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PE Note: Erratum to Hanagata and Nobuharai. 2015
2 February 2015

An incorrect version of Figure 16 was presented in Hanagata and Nobuharai, 2015. Illustrated guide to Pliocene foraminifera from Miyakojima, Ryukyu Island Arc, with comments on biostratigraphy. Palaeontologia Electronica 18.1.3A: 1-140. palaeo-electronica.org/content/2015/1016-foraminifera-of-miyakojima. The following is the correct figure.

 figure16 corrected

PE Note: Corrigendum to Hanagata and Nobuharai. 2015
3 January 2016

Corrigendum to “Illustrated guide to Pliocene foraminifera from Miyakojima, Ryukyu Island Arc, with comments on biostratigraphy,”

Hanagata, Satoshi and Nobuhara, Takami. 2015. Palaeontologia Electronica 18.1.3A: 1-140.

palaeo-electronica.org/content/2015/1016-foraminifera-of-miyakojima

 

Figure Cited number Correct number
Figure 17.20 MPC-26018 MPC-26020
Figure 18.10 MPC-25926 MPC-25929
Figure 19.12 MPC-25941 MPC-25946
 
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Illustrated guide to Pliocene foraminifera from Miyakojima, Ryukyu Island Arc, with comments on biostratigraphy

Satoshi Hanagata and Takami Nobuhara

Plain Language Abstract

Miyakojima Island is situated in the southwestern part of the Ryukyu Island Arc, the tropical region of the Japanese islands. The Pliocene Shimajiri Group in the island is composed mostly of sublittoral (shelf) and bathyal (slope) sediments and is accessible in a number of conspicuous outcrops along the east and southeast coast and inland in the southwest. Forty-seven planktonic and 267 benthic foraminiferal species have been identified from 31 rock samples collected from outcrops that cover almost all horizons of the island sections. The taxonomy of these foraminifera is discussed, inclusive of comments on synonymy of "endemic" species described from Japan with ubiquitous/well-established species reported mainly from southeast Asia. Planktonic foraminiferal biostratigraphy shows the age of the Shimajiri Group to be Early to Late Pliocene. All species are illustrated using focus-stacking software from an assembly of digital camera images taken in optical microscopy. The multi-focus illustrations can show natural color, texture and inner structures, including septum. More specimens are illustrated for each species, pictures having been taken from at least two directions in order to show three-dimensional morphological variations of the species so as to furnish an effective guide for future study.

Resumen en Español

Guía ilustrada de foraminíferos pliocenos de Miyakojima, arco insular Ryukyu, con comentarios sobre bioestratigrafía

Este es la primera recopilación sistemática exhaustiva y totalmente ilustrada de los foraminíferos tanto planctónicos como bentónicos del Plioceno del Grupo Shimajiri en Miyakojima, al sur del arco insular Ryukyu. Se han identificado un total de 47 especies planctónicas en 18 géneros y 267 taxones bentónicos en 151 géneros a partir de 31 muestras de matriz rocosa que abarcan casi todos los horizontes en las secciones insulares. Todas las especies, junto con las variedades morfológicas, se ilustran usando software que integra fotografías tomadas a diferente distancia focal con una cámara digital acoplada a un microscopio óptico. Estas ilustraciones multi-foco pueden mostrar el color y la textura naturales (reflexión y transmisión), y las estructuras internas, incluyendo la forma del septo, el cual no es visible con microscopía electrónica de barrido. Las notas sistemáticas incluyen comentarios de sinonimias de especies ubicuas y bien establecidas que han sido descritas de otras áreas. La presente compilación exhaustiva con ilustraciones novedosas proporciona una guía eficaz para la investigación futura de los foraminíferos en las regiones circundantes.

La bioestratigrafía basada en los foraminíferos planctónicos en Miyakojima también se ha reexaminado considerando el ambiente sedimentario para explicar la ausencia de algunas especies guía. Se confirma la edad Plioceno temprano hasta Plioceno terminal del Grupo Shimajiri en Miyakojima, correlativo con la Zona Pl1 (Formación Oura), zonas Pl1 a Pl2 (Formación Onogoshi), zonas Pl2 a Pl4 (Formación Yonahama) y la Zona Pl5 (Formación Minebari), respectivamente.

Palabras clave: taxonomía; foraminíferos; Ryukyu; Plioceno; micrografías ópticas

Traducción: Enrique Peñalver

Résumé en Français

Guide illustré des foraminifères du Pliocène de Miyakojima, Arc volcanique de Ryukyu, avec des commentaires sur la biostratigraphie

Ceci est le premier rapport systématique complet entièrement illustré sur les foraminifères à la fois planctoniques et benthiques provenant du Groupe Shimajiri du Pliocène sur l'île de Miyakojima, dans le sud de l'Arc volcanique de Ryukyu. Un total de 47 espèces planctoniques dans 18 genres et 267 taxons benthiques dans 151 genres ont été identifiés dans 31 échantillons de matrice couvrant presque tous les horizons dans les sections de l'île. Toutes les espèces, ainsi que leurs variétés morphologiques, sont illustrés en utilisant des logiciels de mise au point d'empilage, en assemblant des images d'appareils photo numériques prises en microscopie optique. Ces illustrations à multiples distances focales peuvent montrer la couleur naturelle et la texture (réflexion et transmission), et les structures internes, y compris la forme du septum, qui ne sont pas disponibles en microscopie électronique à balayage. Les notes systématiques comprennent des commentaires sur les synonymes d'espèces ubiquistes / bien établies décrites dans d'autres régions. Le présent rapport complet avec de nouvelles illustrations fournit un guide efficace pour la recherche future des foraminifères dans les régions environnantes.

La biostratigraphie des foraminifères planctoniques dans l'île de Miyakojima a également été réexaminé en tenant compte de l'environnement sédimentaire pour expliquer l'absence de certaines espèces indices. L'âge du début jusqu'à la fin du Pliocène du Groupe Shimajiri sur l'île de Miyakojima, en corrélation avec la zone Pl1 (Formation d'Oura), les zones Pl1 à PL2 (Formation d'Onogoshi), les zones Pl2 à PI4 (Formation de Yonahama) et la zone PL5 (Formation de Minebari), respectivement, est confirmée.

Mots-clés: taxonomie; foraminifères; Ryukyu; Pliocène; micrographies optiques

Translator: Kenny J. Travouillon

Deutsche Zusammenfassung

Ein illustrierter Führer zu den pliozänen Foraminiferen von Miyakojima, Ryukyu Inselbogen, mit Bemerkungen zur Biostratigrafie

Dies ist der erste umfassende und komplett illustrierte bericht über planktonische und benthische Foraminiferen aus der pliozänen Shimajiri Gruppe der Miyakojima Insel im südlichen Ryukyu Inselbogen. Insgesamt wurden 47 planktonische Arten in 18 Gattungen und 267 benthische Taxa in 151 Gattungen in 31 Matrixproben, die fast alle Horizonte der Inselsektionen abdecken, identifiziert. Alle Arten, auch die morphologischen Varietäten, wurden mit Focus-Stacking-Software durch Zusammensetzen von digitalen Bildern, aufgenommen mit optischer Mikroskopie, illustriert. Diese Multi-Fokus-Illustrationen können die natürliche Farbe und Textur zeigen (Reflektion und Transmission) sowie innere Strukturen wie Form des Septums, was mit Rasterelektronenmikroskopie nicht möglich ist. Systematische Anmerkungen enthalten Hinweise auf Synonyme von ubiquitären/etablierten Arten die aus anderen Gegenden beschrieben wurden. Der vorliegende umfassende Bericht mit neuartigen Illustrationen stellt einen aktuellen Leitfaden für zukünftige Forschung an Foraminiferen in umliegenden Regionen dar. Die Biostratigrafie planktonischer Foraminiferen auf der Miyakojima Insel wurde ebenso erneut unter Berücksichtigung der Sedimente geprüft, um die Abwesenheit einiger Indexarten zu erklären. Das früh-bis spätpliozäne Alter der Shimajiri Gruppe auf der Miyakojima Insel, das mit der Pl1 Zone (Oura Formation), den Pl1 bis Pl2 Zonen (Onogoshi Formation), den Pl2 bis Pl4 Zonen (Yonahama Formation) und der Pl5 Zone (Minebari Formation) korreliert, wird bestätigt.

Schlüsselwörter: Taxonomie; Foraminifera; Ryukyu; Pliozän; optische Aufnahmen

Translator: Eva Gebauer

Arabic

444 arab

Translator: Ashraf M.T. Elewa

 

 

TABLE 1. Explanations of outcrop and sample. For detailed sampling locality, see Figure 2.

OutcropExplanationSampleLithology and sampling position

 

 

 

 

OU1 Located in north of Shimajiri settlement northernmost of Miyakojima; lower three meters, alternations of decimeter order gray sandy siltstone and fine sandstone beds; upper three meter, massive siltstone. 18 Silty sandstone; taken from uppermost of lower alternation member.
OG1 Located in cliff at about 1.2km northwest of Pisseoganzaki cape; about 10m high; composed of well-sorted very fine sandstone or sandy siltstone, contains bivalve shell fossils. 11 Siltstone; taken from lower part of the outcrop.
OG2 Located in about 800m southwest of Pisseoganzaki cape; a small outcrop of about 1m high on ground floor of residental development land; gray clayey siltstone overlain by poorly sorted sandstone bed containing rip-up clasts; sand-pipes, 1cm in diameter, penetrating into the lower siltstone bed from the base of upper sandstone bed. 3 Mixture of sandstone and siltstone; taken from lower siltstone bed of exposure but contains sand-pipes extending from upper sandstone bed.
3-2-low-silt Siltstone; taken from the lower bed.
3-2-up-sand Fine sandstone; taken from upper sandstone bed.
OG3 Located about 200m southwest of Locality OG2; composed mainly of massive siltstone and occasionally contains very fine to medium sandstone. 10 Siltstone; taken from a massive siltstone part.
YH1 Located in about 200m east of shrimp farm south of Takano fishing port; approximately 5m high and 5m wide; composed of massive and gray siltstone. 17 Siltstone; taken from middle of the outcrop.
YH4 Located in the western part of Yonahamazaki (cape); approximately 5m high; massive siltstone-clayey siltstone facies. 6 Both samples 6 and 6-2, siltstone; taken from lowermost of the exposure, almost the same horizon.
6-2
YH3 Located about 1400m west of Yonahamazaki; about 2m high; massive siltstone facies. 16 Siltstone; taken from upper part of the exposure.
YH2 Located close to the YH3; 4m high; consists of massive siltstone with intercalations of thin tuff beds, 5-10cm rhick. 15 Siltstone; taken from approximately 1m high from the base of exposure.
YH5 Located about 700m southeast of Yonahamazaki; about 15m high; massive siltstone facies, molluscan fossils rare. 7 Siltstone; taken from basal part of the exposure.
YH6 Coastal cliff, located 2300m southeast of Yonahamazaki; 3m high and 3m wide ; massive siltstone facies. 14 Both samples 14 and 14-2, siltstone; taken from the basal part of the exposure.
14-2
YH7 Coastal cliff, 200m south of the YH6; 5-6m high and 10m wide; consists mostly of massive siltstone and intercalates several thin (2-3cm) fine acidic tuff layers and sandy siltstone beds. 8 Sandy siltstone; taken from 3m high from base of the exposure.
8-2 Siltstone; taken from about 20cm higher horizon of sample 8.
YH8 Located near Sugama village, southwestern part of Miyakojima; about 1m high; composed of massive siltstone; probably correlatable to the lower part of the Yonahama formation in northeast coast section. MK01 Siltstone; taken from the base of exposure.
MB1 Located about 1km south of the YH7, 500m inland from the Urasoko beach: about 20m high; rhysmic alternations of fine sandstone and siltstone, sanstone beds 2-5cm thick and siltstone beds 10-20cm; only one outcrop of Minebari Formation in east coast of Miyakojima in this study. 9 Siltstone; no molluscan fossil.
MB4 Located in south coast of the island, south of Bora settlement (also MB2~8); about 1m high; massive clayey siltstone rich in trace fossils; molluscan fossil not found. 5, 5-2 Both samples 5 and 5-2, siltstone; taken from almost the same horizon, middle of the exposure.
MB5 Located about 10m above the MB4; 4m high and 18m width; bedded alternation of sandy siltstone intercalating thin fine sandstone. 2 Taken from sandy siltstone bed of alternation; diverse molluscan fossils included.
2-2 Taken about 1m below the sample 2, close to the bottom of exposure; lithology is the same as sample 2.
MB6 Located about 7m above the MB5; almost massive facies intercalating thin sandstone beds; This outcrop and following MB7 and MB8 expose almost continuously. 1, 1-2 Both samples 1 and 1-2, sandy siltstone; taken from almost the same horizon of massive sandy siltstone facies.
MB7 Located about 50cm above the MB6; siltstones intercalating thin sandstone beds. 12 siltstone just above thin sandstone bed rich in fossil foraminifers
MB8 Located above MB7. 4 Pumiceous massive sandy siltstone; taken about 0.5m above the horizon of Sample 12.
4-2 Pumiceous massive sandy siltstone; about 1m above the Sample 4.
MB3 Basal part of coastal cliff located in west of Bora beach; 1-2m thick below a large floatstone of the Ryukyu Limestone; sandy siltstone and sandstone; a number of sand-pipes in the silty part. MK02A Sandy siltstone including abundant molluscan fossils.
MK02A-2 Sandy siltstone; almost the same horizon of Sample MK02A.
MK02B Siltstone; taken from massive siltstone bed above the mollusca-rich sandstone bed of Sample MK02A.
MB2 Small outcrop of fine silty sandstone contaning abundat rip-up clasts of siltstone in chatic texture, about 2m high and 2m wide below limestone block; significant bioturbation, including bivalve and fragmental simple coral fossils. 13 Taken from a sandy siltstone clast of the exposure.

TABLE 2. List of fossil foraminifera from the Shimajiri Group of Miyakojima (presented in PDF format).

 

 

author1Satoshi Hanagata
Akita-shi Asahikawa-minamimachi 15-21
Akita 010-0834
Japan
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1992-2001 Researcher of micropaleontology (foraminifera) at Japan Petroluem Exploration Co. Ltd (JAPEX Research Center). 2001-now Independent researcher of the Cenozoic and Mesozoic foraminifera from Japan. 2004 Ph.D. in Science (Nagoya University).

divider

author2Takami Nobuhara
Department of Science Education (Geology)
Faculty of Education
Shizuoka University
Oya 836, Suruga-ku
Shizuoka 422-8529
Japan
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Professor of Science Education (Geology), Shizuoka University, Japan. Researcher in Cenozoic marine molluscan palaeontology, especially in deep-sea palaeoecology containing chemosynthetic fauna.
Member of the Palaeontological Society of Japan, the Geological Society of Japan, and the Malacological Society of Japan. Main investigation areas are Cenozoic offshore to deep-sea muddy facies in SW Japan.

 

FIGURE 1. Index map of Miyakojima (left) and location of studied fossiliferous outcrops plotted on geologic sketch map compiled after Nakamori (1982) (right).

 figure1

FIGURE 2. Map of sampling sites. Each map is made from 1:25,000 digital map of Geospatial Information Authority of Japan.

 figure2

FIGURE 3. Image examples of focus stacking process. Combined image is processed gathering clearly focused part from pictures taken at several sequential focus depths. Above example is edge view of Globorotalia cultrata from sample MK01. The figure below in the frame is a principle image of focus stacking of optical micrograph. Specimen is mounted on a microscale slide to see its size (background line is used to make scale bar).

 figure3

FIGURE 4. Occurrences of representative foraminiferal species. Scales of abundances are percentage in the assemblages (%). For more detail, see PDF version.

figure4a

 figure4b

FIGURE 5. Lithologic column of outcrops, occurrences of index and stratigraphically important planktonic foraminifera. Stratigraphic intervals of each outcrop are not to scale. Thick arrows in the figure indicate first or last occurrences of index and stratigraphically important species of planktonic foraminiferal zones.

figure5 

FIGURE 6. Family Hormosinidae, Ammosphaeroidinidae, Spiroplectamminidae, Duquepsamminidae, Verneuilinidae, and Eggerellidae. All scale bars = 0.1mm, unless otherwise indicated in 2.1, 23.1, 26.1 as 1mm-line. 1, 2. Rhabdammina sp., 1: MPC-26061, 2: MPC-26062, both from sample 7 (Yonahama Formation, PL4), broken specimens. 3 . Hormosinella distans (Brady), MPC-26051, from sample 15 (Yonahama F., PL3), depressed specimen. 4 . Reophax sp., MPC-26060, from sample 7 (Yonahama F., PL4). 5, 6. Ammosphaeroidina sphaeroidiniformis (Brady); 5: MPC-26033 from sample 6 (Yonahama F., PL2); 6: MPC-26034, from sample 6-2 (Yonahama F., PL2). 7, 8. Spiroplectinella wrightii (Silvestri), 7: MPC-26065 from sample 6-2 (Yonahama F., PL2); 8: MPC-26066 from sample MK02A-2 (Minebari F., PL5). 9, 10. Duquepsammia bulbosa (Cushman), 9: MPC-26041 from sample 8 (Yonahama F., PL4), 10: MPC-26042 from sample 15 (Yonahama F., PL3). 11, 12 . Trochammina sp., 11: MPC-26077, laterally depressed specimen, 12: MPC26078, vertically depressed specimen, both from sample 7 (Yonahama F., PL4). 13, 14. Gaudryina arenaria Galloway and Wissler, 13: MPC-26045 from sample 6-2 (Yonahama F., PL2); 14: MPC26046 from sample 17 (Yonahama F., PL2). 15, 16. Gaudryina sp.A., 15: MPC-26047 from sample 3-2-low-silt (Onogoshi F., PL1); 16: MPC-26048 from sample 11 (Onogoshi F., ?PL1). 17, 18. Gaydryinella cf. japonica Asano, 17 MPC-26049, 18 MPC-26050, both from sample 18 (Oura F., ?PL1). 19, 20. Eggerella bradyi (Cushman), 19: MPC-26043 from sample 14-2 (Yonahama F., PL4); 20: MPC-26044 from sample 15 (Yonahama F., PL3). 21, 22. Karreriella bradyi (Cushman), 21: MPC-26052 from sample 2 (Minebari F., PL5); 22: MPC-26053 from sample MK02A (Minebari F., PL5). 23, 24. Martinottiella communis (d'Orbigny), 23: MPC-26054 from sample 3 (Onogoshi F., PL1); 24: MPC-26055 from sample 3-2-low-silt (Onogoshi F., PL1). 25, 26. Martinottiella victorensis (Cushman), 25: MPC-26056 from sample 6-2 (Yonahama F., PL2); 26: MPC-26057 from sample 16 (Yonahama F., PL3).

 figure6

FIGURE 7. Family Textulariidae, Pseudogaudryinidae, and Valvulinidae. All scale bars = 0.1mm, unless otherwise indicated. 1, 2. Bigenerina nodosaria d'Orbigny, 1: MPC-26035 from sample 2 (Minebari Formation, PF5); 2: MPC-26036 from sample 11 (Onogoshi F., ?PF1). Difference of coarseness and test size between specimens of figured 1 and 2 probably reflect eco-phenotypic variation and preservation. 3, 4. Textularia agglutinans d'Orbigny, 3: MPC-26067, 4: MPC26068, both from sample 18 (Oura F., ?PF1). 5. Textularia cf. candeiana d'Orbigny, MPC-26069, broken specimen from sample 18 (Oura F., ?PF1). 6, 7. Textularia pseudosolita Zheng, 6: MPC-26070 from sample 6 (Yonahama F., PL2); 7: MPC-26071 from sample 6-2 (Yonahama F., PL2). 8, 9. Textularia vola Lalicker and McCulloch, 8: MPC-26072 from sample 8 (Yonahama F., PL4); 9: MPC-26073 from sample 15 (Yonahama F., PL3). 10, 11. Textularia sp.A, 10: MPC-26074, 11: MPC-26075, both from sample 18 (Oura F., ?PL1). 12, 13. Siphotextularia foliosa Zheng, 12: MPC-26063 from sample 1 (Minebari F., PL5); 13: MPC-26064 from sample 15 (Yonahama F., PL3). 14, 15. Pseudoclavulina serventyi (Chapman and Parr), 14: MPC-26058 from sample 11 (Onogoshi F., ?PL1); 15: MPC-26059 from sample 18 (Oura F., ?PL1). 16, 17. Clavulina multicamerata Chapman, 16: MPC-26037 from sample 5-2 (Minebari F., PL5); 17: MPC-26038 from sample 18 (Oura F., ?PL1). 18, 19. Cribrogoesella robusta (Brady), 18: MPC-26039, 19: MPC-26040, both from sample 18 (Oura F., ?PL1).

 figure7

FIGURE 8. Family Spiroloculinidae and Hauerinidae. All scale bars = 0.1mm, unless otherwise indicated. 1. Adelosina schreibersii (d'Orbigny), MPC-26079 from sample 6 (Yonahama Formation, PL2). 2, 3. Ammomassilina alveoliniformis (Millett), 2: MPC-26080 from sample 12 (Minebari F., PL5); 3: MPC-26081 from sample MK02A (Minebari F., PL5). 4. Cycloforina rugosa (d'Orbigny), MPC-26082 from sample 18 (Oura F., ?PL1). 5, 6 . Massilina minuta Collins, 5: MPC-26083, 6: MPC-26084, both from sample 14 (Yonahama F., PL4). 7, 8. Quinqueloculina akneriana d'Orbigny, 7: MPC-26088, 8: MPC-26089, both from sample 18 (Oura F., ?PL1). 9, 10. Quinqueloculina auberiana d'Orbigny, 9: MPC-26090 from sample 6 (Yonahama F., PL2); 10: MPC-26091 from sample 6-2 (Yonahama F., PL2). 11. Quinqueloculina sagamiensis Asano, MPC-26092 from sample 6-2 (Yonahama F., PL2). 12, 13. Quinqueloculina seminulum (Linnaeus), 12: MPC-26093 from sample 18 (Oura F., ?PL1); 13: MPC-26094 from sample MK02B (Minebari F., PL5). 14, 15. Quinqueloculina starkeri Loeblich and Tappan, 14: MPC-26095, 15: MPC-26096, both from sample 1 (Minebari F., PL5). 16. Pyrgo murrhina (Schwager), MPC-26085 from sample MK02A (Minebari F., PL5).

 figure8

FIGURE 9. Family Hauerinidae and Nodosariidae. All scale bars = 0.1mm, unless otherwise indicated. 1. Pyrgo subsphaerica (d'Orbigny), MPC-26087 from sample 6-2 (Yonahama Formation, PL2). 2. Pyrgo simplex (d'Orbigny), MPC-26086 from sample MK02B (Minebari F., PL5). 3. Triloculina tricarinata Parker, Jones, and Brady (young form), MPC-26104 from sample 1 (Minebari F., PL5). 4. Sigmoilina cf. sigmoidea (Brady), MPC-26097 from sample 6 (Yonahama F., PL2), aperture broken. 5, 6. Spirosigmoilina tenuis (Cžjžek), 5: MPC-26100 from sample 11 (Onogoshi F., ?PL1); 6: MPC-26101 from sample 18 (Oura F., PL1). 7, 8. Spirosigmoilina pusilla (Earland), 7: MPC-26102 from sample 5-2 (Minebari F., PL5); 8: MPC-26103 from sample 11 (Onogoshi F., ?PL1). 9, 10. Sigmoilopsis schlumbergeri (Silvestri), 9: MPC-26098 from sample 18 (Oura F., ?PL1); 10: MPC-26099 from sample MK01 (Yonahama F., PL2). 11. Chrysalogonium equisetiformis (Schwager), MPC-26196 from sample 16 (Yonahama F., PL3). 12, 13. Dentalina albatrossi (Cushman), 12: MPC-26216, 13: MPC-26217, both from sample 2-2 (Minebari F., PL5). 14. Chrysalogonium deceptorium (Schwager), MPC-26195 from sample 2-2 (Minebari F., PL5). 15, 16. Dentalina aff. catenulata (Brady), 15: MPC-26218 from sample 6-2 (Yonahama F., PL2); 16: MPC-26219 from sample 11 (Onogoshi F., ?PL1). 17, 18. Dentalina mutsui Hada, 17: MPC-26220 from sample 18 (Oura F., ?PL1); 18: MPC-26221 from sample MK01 (Yonahama F., PL2). 19. Dentalina sp.A, MPC-26222 from sample 8-2 (Yonahama F., PL4).

 figure9

FIGURE 10. Family Nodosariidae, Stilostomellidae, and Vaginulinidae. All scale bars = 0.1mm, unless otherwise indicated. 1, 2. Grigelis orectus Loeblich and Tappan, 1: MPC-26294, 2: MPC-26295, both from sample 3-2-low-silt (Onogoshi Formation, PL1). 3, 4. Laevidentalina advena (Cushman), 3: MPC-26334 from sample 5 (Minebari F., PL5); 4: MPC-26335 from sample MK02A-2 (Minebari F., PL5). 5. Laevidentalina antarctica (Parr), MPC-26336 from sample 8 (Yonahama F., PL4). 6, 7. Laevidentalina ariena (Patterson and Pettis), 6: MPC-26337 from sample 3-2-low-silt (Onogoshi F., PL1); 7: MPC-26338 from sample 11 (Onogoshi F., ?PL1). 8. Laevidentalina bradyensis (Dervieux), MPC-26339 from sample 1 (Minebari F., PL5); 8.3 magnified view of aperture. 9, 10. Laevidentalina subemaciata (Parr), 9: MPC-26340 from sample 3 (Onogoshi F., PL1); 10: MPC-26341 from sample 3-2-low-silt (Onogoshi F., PL1); 10.4 magnified aperture oblique-view. 11. Laevidentalina sp.A, MPC-26342 from sample 6 (Yonahama F., PL2). 12. Mucronina hasta (Parker, Jones, and Brady), MPC-26379 from sample 8-2 (Yonahama F., PL4). 13, 14. Neugeborina longiscata (d'Orbigny), 13: MPC-26547 from sample 6-2 (Yonahama F., PL2); 14: MPC-26391 from sample MK02B (Minebari F., PL5). 15—18. Pseudonodosaria discreta (Reuss), 15: MPC-26434 from sample 2-2 (Minebari F., PL5); 16: MPC-26435 from sample MK01 (Yonahama F., PL2); 17: MPC-26436 from sample 2-2 (Minebari F., PL5); 18: MPC-26437 from sample MK02A (Minebari F., PL5); 15 and 16 megalospheric forms, 17 and 18 microspheric forms. 19, 20. Parafrondicularia helenae (Chapman), 19: MPC-26418 from sample 3-2-low-silt (Onogoshi F., PL1); 20: MPC-26419 from sample MK01 (Yonahama F., PL2). 21, 22. Proxifrons inaequalis (Costa), 21: MPC-26428 from sample 3-2-up-sand (Onogoshi F., PL1); 22: MPC-26429 from sample 6 (Yonahama F., PL2). 23, 24. Lenticulina aculeata (d'Orbigny), 23: MPC-26350 from sample 10 (Onogoshi F., PL1); 24: MPC-26351 from sample 18 (Oura F., ?PL1).

 figure10

FIGURE 11. Family Vaginulinidae. All scale bars = 0.1mm, unless otherwise indicated. 1, 2. Lenticulina cultrata (de Montfort), 1: MPC-26352 from sample 2 (Minebari Formation, PL5); 2: MPC-26353 from sample MK02A-2 (Minebari F., PL5). 3, 4. Lenticulina depressa (Asano), 3: MPC-26354 from sample 11 (Onogoshi F., ?PL1); last three chambers show aberrant inflation; 4: MPC-26355 from sample 18 (Oura F., ?PL1) broken specimen. 5, 6. Lenticulina inornata (d'Orbigny), 5: MPC-26356 from sample 3-2-up-sand (Onogoshi F., PL1); 6: MPC-26357 from sample MK02B (Minebari F., PL5). 7. Lenticulina iota (Cushman), MPC-26358 from sample 3-2-up-sand (Onogoshi F., PL1). 8, 9. Lenticulina orbicularis (d'Orbigny), 8: MPC-26359 from sample 6 (Yonahama F., PL2); 9: MPC-26360 from sample MK01 (Yonahama F., PL2). 10, 11. Lenticulina sintikuensis Nakamura, 10: MPC-26361, 11: MPC-26362, both from sample 6-2 (Yonahama F., PL2). 12. Lenticulina thalmanni (Hessland), MPC-26363 from sample 2-2 (Minebari F., PL5). 13, 14. Lenticulina vortex (Fichtel and Moll), 13: MPC-26364 from sample 2-2 (Minebari F., PL5); 14: MPC-26365 from sample MK02A-2 (Minebari F., PL5); 13, broken specimen. 15. Marginulinopsis striatulus (Cushman), MPC-26369 from sample 4 (Minebari F., PL5). 16, 17. Neolenticulina variabilis (Reuss), 16: MPC-26389 from sample 1-2 (Minebari F., PL5); 17: MPC-26390 from sample 18 (Oura F., ?PL1).

 figure11

FIGURE 12. Family Vaginulinidae. All scale bars = 0.1mm, unless otherwise indicated. 1, 2. Saracenaria aff. akitaensis Iwasa and Kikuchi, 1: MPC-26485 from sample 2 (Minebari Formation, PL5); 2: MPC-26486 from sample 17 (Yonahama F., PL2). 3. Saracenaria altifrons (Parr), MPC-26487 from sample 15 (Yonahama F., PL3). 4, 5. Saracenaria italica Defrance, 4: MPC-26488, 5: MPC-26489, both from sample 2-2 (Minebari F., PL5). 6. Spincterules sp.A, MPC-26507 from sample 5-2 (Minebari F., PL5). 7, 8. Amphicoryna hispida (d'Orbigny), 7: MPC-26118 from sample 3-2-low-silt (Onogoshi F., PL1); 8: MPC-26119 from sample MK01 (Yonahama F., PL2). 9—11. Amphicoryna separans (Brady), 9: MPC-26120 from sample 3-2-low-silt (Onogoshi F., PL1); 10: MPC-26121 from sample 14-2 (Yonahama F., PL4), 11: MPC-26122 from sample 5 (Minebari F., PL5). 12, 13. Astacolus japonicus (Asano), 12: MPC-26132 from sample 2 (Minebari F., PL5); 13: MPC-26133 from sample 6-2 (Yonahama F., PL2). 14. Astacolus insolitus (Schwager), MPC-26131 from sample 15 (Yonahama F., PL3). 15, 16. Hemirobulina aff. obesa (Cushman), 15: MPC-26546 from sample 16 (Yonahama F., PL3); 16: MPC-26315 from sample MK01 (Yonahama F., PL2). 17. Hemirobulina aff. uedai (Asano), MPC-26316 from sample 15 (Yonahama F., PL3). 18. Vaginulinopsis sublegumen Parr, MPC-26528 from sample 3 (Oura F., PL1).

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FIGURE 13. Family Vaginulinidae, Lagenidae, Polymorphinidae, and Ellipsolagenidae. All scale bars = 0.1mm, unless otherwise indicated. 1, 2. Vaginulinopsis tenuis (Bornemann), 1: MPC-26529, 2: MPC-26530, both from sample 2-2 (Minebari Formation, PL5). 3, 4. Planularia californica (Galloway and Wissler), 3: MPC-26414, 4: MPC-26415, both from sample 2-2 (Minebari F., PL5). 5, 6. Vaginulina bradyi Cushman, 5: MPC-26526 from sample 4 (Minebari F., PL5); 6: MPC-26527 from sample MK01 (Yonahama F., PL2). 7. Conolagena favosopunctata (Brady), MPC-26209 from sample MK02A-2 (Minebari F., PL5). 8. 9. Hyalinonetrion gracillium (Costa), 8: MPC-26332 from sample 6-2 (Yonahama F., PL2); 9: MPC-26333 from sample MK02A-2 (Minebari F., PL5). 10, 11. Lagena sulcata (Walker and Jacob), 10: MPC-26343 from sample 3-2-up-sand (Onogoshi F., PL1); 11: MPC-26344 from sample 17 (Yonahama F., PL2). 12. Procerolagena gracilis (Williamson), MPC-26425 from sample 14-2 (Yonahama F., PL4). 13, 14. Procerolagena multilatera (McCulloch), 13: MPC-26426 from sample 8-2 (Yonahama F., PL4); 14: MPC-26427 from sample 14 (Yonahama F., PL4). 15, 16. Pygmaeoseistron aspera (Reuss), 15: MPC-26446 from sample 3-2-up-sand (Onogoshi F., PL1); 16: MPC-26447 from sample 16 (Yonahama F., PL3). 17, 18. Pygmaeoseistron hispidulum (Cushman), 17: MPC-26448 from sample 1 (Minebari F., PL5); 18: MPC-26449 from sample 15 (Yonahama F., PL3). 19—22. Pygmaeoseistron oceanicum (Albani), 19: MPC-26450 from sample 5 (Minebari F., PL5); 20: MPC-26451 from sample 7 (Yonahama F., PL4); 21: MPC-26549 from sample 11 (Onogoshi F., ?PL1), 22: MPC-26550 from sample 17 (Yonahama F., PL2). 23. Pygmaeoseistron sp. indet. MPC-26452 from sample 10 (Onogoshi F., PL2). 24—26. Sigmoidella elegantissima (Parker and Jones), 24: MPC-46490 from sample 2-2 (Minebari F., PL5); 25: MPC-46491 and 26: MPC-46492 from sample 18 (Oura F., ?PL1). 27. Exsculptina glaphyraheda Loeblich and Tappan, MPC-26254 from sample 17 (Yonahama F., PL2). 28. Favulina melo (d'Orbigny), MPC-26257 from sample 4-2 (Minebari F., PL5).

figure13 

FIGURE 14. Family Ellipsolagenidae, Glandulinidae, and Epistominidae. All scale bars = 0.1mm. 1. Favulina scalariformis (Williamson), MPC-26258 from sample 4 (Minebari Formation, PL5). 2, 3. Fissurina angulata (Uchio), 2: MPC-26261, 3: MPC-26262, both from sample MK01 (Yonahama F., PL2). 4, 5. Fissurina bradii Silvestri, 4: MPC-26263 from sample 6 (Yonahama F., PL2); 5: MPC-26264 from sample 14-2 (Yonahama F., PL4). 6, 7. Fissurina caribaea (Cushman), 6: MPC-26265 from sample 15 (Yonahama F., PL3); 7: MPC-26266 from sample MK01 (Yonahama F., PL2). 8, 9. Fissurina circularis Todd, 8: MPC-26267 from sample 3-2-low-silt (Onogoshi F., PL1); 9: MPC-26268 from sample MK02B (Minebari F., PL5). 10, 11. Fissurina marginata (Montagu), 10: MPC-26269 from sample 3-2-low-silt (Onogoshi F., PL1); 11: MPC-26270 from sample 16 (Yonahama F., PL3). 12. Fissurina quadrata (Williamson), MPC-26271 from sample 1 (Minebari F., PL5). 13. Parafissurina basispinata McCulloch, MPC-26404 from sample 7 (Yonahama F., PL4). 14, 15. Parafissurina lata (Wiesner), 14: MPC-26405 from sample 2 (Minebari F., PL5); 15: MPC-26406 from sample MK01 (Yonahama F., PL2). 16, 17. Pseudofissurina metaconica (McCulloch), 16: MPC-26432 from sample 8-2 (Yonahama F., PL4); 17: MPC-26433 from sample 17 (Yonahama F., PL2). 18, 19. Montcharmontzeiana leminiscata (Loeblich and Tappan), 18: MPC-26377, 19: MPC-26378, both from sample 7 (Yonahama F., PL4). 20, 21. Glandulina ovula d'Orbigny, 20: MPC-26279 from sample 7 (Yonahama F., PL4); 21: MPC-26280 from sample 10 (Onogoshi F., PL2). 22, 23. Hoeglundina elegans (d'Orbigny), 22: MPC-26322 from sample 4 (Minebari F., PL5); 23: MPC-26323 from sample 13 (Minebari F., PL5).

 figure14

FIGURE 15. Family Epistominidae and Globorotaliidae. All scale bars = 0.1mm, unless otherwise indicated. 1, 2. Hoeglundina elegans (d'Orbigny) large form, 1: MPC-26324 from sample 2-2 (Minebari Formation, PL5); 2: MPC-26325 from sample 4 (Minebari F., PL5). 3, 4. Clavatorella aff. suturanii Giannelli and Salvatorini, 3: MPC-25930 from sample 5 (Minebari F., PL5); 4: MPC-25931 from sample MK01 (Yonahama F., PL2). 5, 6. Globorotalia conoidea Walters, 5: MPC-25968 from sample 7 (Yonahama F., PL4); 6: MPC-25969 from sample 8-2 (Yonahama F., PL4). 7, 8. Globorotalia conomiozea Kennett, 7: MPC-25970 from sample 3 (Onogoshi F., PL1); 8: MPC-25971 from sample 6 (Yonahama F., PL2). 9, 10. Globorotalia crassaformis (Galloway and Wissler), 9: MPC-25972 from sample MK02A (Minebari F., PL5); 10: MPC-25973 from sample MK02B (Minebari F., PL5). 11, 12. Globorotalia cultrata (d'Orbigny), 11: MPC-25974 from sample MK01 (Yonahama F., PL2); 12: MPC-25975 from sample MK02A (Minebari F., PL5).

 figure15

FIGURE 16. Family Globorotaliidae. All scale bars = 0.1mm, unless otherwise indicated. 1, 2. Globorotalia margaritae Bolli and Bermúdez, 1: MPC-25976 from sample 3 (Onogoshi Formation, PL1); 2: MPC-25977 from sample 10 (Onogoshi F., PL2). 3, 4. Globorotalia oceanica Cushman and Bermúdez, 3: MPC-25978, 4: MPC-25979, both from sample MK02A (Minebari F., PL5). 5, 6. Globorotalia scitula (Brady), 5: MPC-25980 from sample 8 (Yonahama F., PL4); 6: MPC-25981 from sample MK01 (Yonahama F., PL2). 7, 8. Globorotalia tumida (Brady), 7: MPC-25982 from sample MK01 (Yonahama F., PL2); 8: MPC-25983 from sample MK02A (Minebari F., PL5). 9, 10. Globorotalia tumida flexuosa (Koch), 9: MPC-25984 from sample 15 (Yonahama F., PL3); 10: MPC-25985 from sample 16 (Yonahama F., PL3). 11, 12. Globorotalia viola Blow, 11: MPC-25987 from sample 1 (Minebari F., PL5); 12: MPC-25986 from sample MK02A (Minebari F., PL5).

 figure16

FIGURE 17. Family Globorotaliidae and Pulleniatinidae. All scale bars = 0.1mm. 1, 2. Neogloboquadrina acostaensis (Blow), 1: MPC-25996 from sample MK01 (Yonahama Formation, PL2); 2: MPC-25997 from sample MK02B (Minebari F., PL5). 3, 4. Neogloboquadrina blowi (Rögl and Bolli), 3: MPC-25998 from sample 6 (Yonahama F., PL2); 4: MPC-25999 from sample 6-2 (Yonahama F., Yonahama F., PL2). 5, 6. Neogloboquadrina humerosa (Takayanagi and Saito), 5: MPC-26000 from sample 15 (Yonahama F., PL3); 6: MPC-26001 from sample MK02A (Minebari F., PL5). 7—14. Neogloboquadrina incompta (Cifelli), 7: MPC-26002 from sample 14-2 (Yonahama F., PL4); 8: MPC-26003 from sample 16 (Yonahama F., PL3); 9: MPC-26004 from sample 3-2-low-silt (Onogoshi F., PL1); 10: MPC-26005 from sample 10 (Onogoshi F., PL2); 11: MPC-26006 from sample 15 (Yonahama F., PL3); 12: MPC-26007 from sample MK01 (Yonahama F., PL2); 13: MPC-26008 from sample 6-2 (Yonahama F., PL2); 14: MPC-26009 from sample 3-2-up-sand (Onogoshi F., PL1). Specimens of 8—10, right coiling (dextral) form; 11—14, left coiling (sinistral) form. 15—17. Neogloboquadrina pseudopachyderma (Cita, Premoli-Silva, and Rossi), 15: MPC-26010 from sample 12 (Minebari F., PL5); 16: MPC-26011 from sample MK01 (Yonahama F., PL2); 17: MPC-26012 from sample 2-2 (Minebari F., PL5). 15 and 16, right coiling (dextral) form; 17, left coiling (sinistral) form. 18, 19. Neogloboquadrina praehumerosa (Natori), 18: MPC-26013 from sample MK01 (Yonahama F., PL2); 19: MPC-26014 from sample MK02B (Minebari F., PL5). 20, 21. Pulleniatina obliquiloculata (Parker and Jones), 20: MPC-26018 from sample 17 (Yonahama F., PL2); 21: MPC-26019 from sample 5 (Minebari F., PL5). 20, left coiling (sinistral) form; 21, right coiling (dextral) form.

 figure17

FIGURE 18. Family Pulleniatinidae, Candeinidae, Catapsydracidae, and Globigerinidae. All scale bars = 0.1mm. 1, 2. Pulleniatina okinawaensis Natori, 1: MPC-26021 from sample 4-2 (Minebari Formation, PL5); 2: MPC-26022 from sample 12 (Minebari F., PL5); both right coiling (dextral) specimens. 3, 4. Pulleniatina praecursor Banner and Blow, 3: MPC-26023, 4: MPC-26024, both from sample 6 (Yonahama F., PL2). 5—7. Globigerinita glutinata (Egger), 5: MPC-25950 from sample MK01 (Yonahama F., PL2); 6: MPC-25951 and 7: MPC-25952 from sample MK02B (Minebari F., PL5). Specimen of 7 lacks bulla-like cover on the umbilicus. 8, 9. Globigerinita uvula (Ehrenberg), 8: MPC-25953 from sample 10 (Onogoshi F., PL2); 9: MPC-25954 from sample MK01 (Yonahama F., PL2). 10. Candeina nitida d'Orbigny, MPC-25926 from sample 5-2 (Minebari F., PL5). 11, 12. Dentoglobigerina altispira (Cushman and Jarvis), 11: MPC-25932 from sample 10 (Onogoshi F., PL2); 12: MPC-25933 from sample MK01 (Yonahama F., PL2). 13, 14. Globorotaloides hexagona (Natland), 13: MPC-25988 from sample 1 (Minebari F., PL5); 14: MPC-25989 from sample 5 (Minebari F., PL5). 15—18. Alloglobigerinoides conglobatus (Brady), 15: MPC-25925 from sample 12 (Minebari F., PL5); 16: MPC-25926 from sample MK02A (Minebari F., PL5); 17: MPC-25927 from sample 5 (Minebari F., PL5); 18: MPC-25928 from sample 14 (Yonahama F., PL4). 17 and 18, variation final chamber covering umbilicus. 19, 20. Globigerina bulloides d'Orbigny, 19: MPC-25936 from sample MK01 (Yonahama F., PL2); 20: MPC-25937 from sample MK02B (Minebari F., PL5).

 figure18

FIGURE 19. Family Globigerinidae. All scale bars = 0.1mm. 1, 2. Globigerina falconensis Blow, 1: MPC-25938 from sample 1 (Minebari Formation, PL5); 2: MPC-25939 from sample MK02B (Minebari F., PL5). 3—6. Globigerina foliata Bolli, 3: MPC-25940 from sample MK01 (Yonahama F., PL2); 4: MPC-25941 from sample MK02B (Minebari F., PL5); 5: MPC-25942 from sample 14 (Yonahama F., PL4); 6: MPC-25943 from sample 16 (Yonahama F., PL3). Specimens of 5 and 6 are morphotype distinguished by Ujiié (1985) as G. foliata var.A. 7, 8. Globigerina bulbosa LeRoy, 7: MPC-25934 from sample 4 (Minebari F., PL5); 8: MPC-25935 from sample 7 (Yonahama F., PL4). 9—11. Globigerinella praecalida Blow, 9: MPC-25944 from sample 4 (Minebari F., PL5); 10: MPC-25945 from sample 8-2 (Yonahama F., PL4); 11: MPC-26544 from sample MK01 (Yonahama F., PL2). Last chamber of specimen of 11 lacks last chamber. 12, 13. Globigerinella pseudobesa (Salvatorini), 12: MPC-25941 from sample 5 (Minebari F., PL5); 13: MPC-25947 from sample 11 (Onogoshi F., ?PL1). Specimen of 13 shows a young stage of the species. 14, 15. Globigerinella siphonifera (d'Orbigny), 14: MPC-25948 from sample 1 (Minebari F., PL5); 15: MPC-25949 from sample 13 (Minebari F., PL5).

 figure19

FIGURE 20. Family Globigerinidae. All scale bars = 0.1mm. 1, 2. Globigerinoides extremus Bolli and Bermúdez, 1: MPC-25955 from sample 14 (Yonahama Formation, PL4); 2: MPC-25956 from sample 15 (Yonahama F., PL3). 3, 4. Globigerinoides obliquus Bolli, 3: MPC-25957 from sample 6 (Yonahama F., PL2); 4: MPC-25958 from sample MK01 (Yonahama F., PL2). 5, 6. Globigerinoides pyramidalis (Van den Broeck), 5: MPC-25959 from sample 1 (Minebari F., PL5); 6: MPC-25960 from sample 2 (Minebari F., PL5). 7—9. Globigerinoides ruber (d'Orbigny), 7: MPC-25961 from sample MK01 (Yonahama F., PL2); 8: MPC-25962 from sample MK02B (Minebari F., PL5); 9: MPC-25963 from sample 1-2 (Minebari F., PL5). Specimen of 9 has aberrant sac-like last chamber. 10—12. Globigerinoides sacculifer (Brady), 10: MPC-25964 and 11: MPC-25965 from sample MK01 (Yonahama F., PL2); 12: MPC-25966 from sample MK02A (Minebari F., PL5). Specimen of 10, young form assignable to G. immatura LeRoy; Specimen of 12 preserves sac-like last chamber.

 figure20

FIGURE 21. Family Globigerinidae, All scale bars = 0.1mm. 1. Globigerinoidesella fistulosa (Schubert), MPC-25967 from sample 8-2 (Yonahama Formation, PL4). Poor preservation is due to serious recrystallization. 2, 3. Globoturborotalita decoraperta (Takayanagi and Saito), 2: MPC-25990 from sample 6 (Yonahama F., PL2); 3: MPC-25991 from sample MK01 (Yonahama F., PL2). 4, 5. Globoturborotalita nepenthes (Todd), 4: MPC-25992 from sample 3 (Onogoshi F., PL1); 5: MPC-25993 from sample 11 (Onogoshi F., ?PL1). Specimens of this study are young form lack elongate later chambers, but narrow-raising aperture with distinct rim characterize this species. 6, 7. Globoturborotalita rubescens (Hofker), 6: MPC-25994 from sample 6 (Yonahama F., PL2); 7: MPC-25995 from sample MK01 (Yonahama F., PL2). 8, 9. Sphaeroidinella dehiscens (Parker and Jones), 8: MPC-26025 from sample 8-2 (Yonahama F., PL4); 9: MPC-26026 from sample MK02B (Minebari F., PL5). 10, 11. Sphaeroidinellopsis seminulina (Schwager), 10: MPC-26027 from sample MK01 (Yonahama F., PL2); 11: MPC-26028 from sample 6 (Yonahama F., PL2). 12, 13. Turborotalita humilis (Brady), 12: MPC-26029 from sample 10 (Onogoshi F., PL2); 13: MPC-26030 from sample MK01 (Yonahama F., PL2). 14, 15. Turborotalita quinqueloba (Natland), 14: MPC-26031 from sample MK01 (Yonahama F., PL2); 15: MPC-26032 from sample MK02B (Minebari F., PL5). 16, 17. Orbulina suturalis Brönnimann, 16: MPC-26015 from sample 8 (Yonahama F., PL4); 17: MPC-26016 from sample 14 (Yonahama F., PL4). 18, 19. Orbulina universa d'Orbigny, 18: MPC-26017 from sample 8-2 (Yonahama F., PL4); 19: MPC-26018 from sample MK02A (Minebari F., PL5).

 figure21

FIGURE 22. Family Bolivinidae. All scale bars = 0.1mm. 1, 2. Bolivina antiqua d'Orbigny, 1: MPC-26140, 2: MPC-26141, both from sample 18 (Oura Formation, ?PL1). 3—6. Bolivina cacozela Vella, 3: MPC-26142 from sample 2-2 (Minebari F., PL5); 4: MPC-26143 from sample 5 (Minebari F., PL5); 5: MPC-26144 from sample 10 (Onogoshi F., PL2); 6: MPC-26145 from sample 16 (Yonahama F., PL3). Specimens of 3 and 4 have larger test size than those of 5 and 6. 7, 8. Bolivina glutinata Egger, 7: MPC-26148 from sample 15 (Yonahama F., PL3); 8: MPC-26149 from sample 16 (Yonahama F., PL3). 9, 10. Bolivina retia Oki, 9: MPC-26154, 10: MPC-26545, both from sample 4 (Minebari F., PL5); 9.4, moisturized specimen showing internal septa. 11, 12. Bolivina robusta Brady, 11: MPC-26155 from sample 5 (Minebari F., PL5); 12: MPC-26156 from sample 10 (Onogoshi F., PL2). 13, 14. Bolivina striatula Cushman, 13: MPC-26157 from sample 14-2 (Yonahama F., PL4); 14: MPC-26158 from sample MK01 (Yonahama F., PL2). 15, 16. Bolivina variabilis (Williamson), 15: MPC-26161 from sample 16 (Yonahama F., PL3); 16: MPC-26162 from sample MK01 (Yonahama F., PL2). 17, 18. Bolivina cochei Cushman and Adams, 17: MPC-26146, 18: MPC-26147, both from sample MK01 (Yonahama F., PL2). 19, 20. Bolivina kiiensis Asano, 19: MPC-26150 from sample 3 (Onogoshi F., PL1); 20: MPC-26151 from sample 3-2-low-silt (Onogoshi F., PL1). 21, 22. Bolivina pacifica Cushman and McCulloch, 21: MPC-26152 from sample 1-2 (Minebari F., PL5); 22: MPC-26153 from sample MK01 (Yonahama F., PL2). 23. Bolivina cf. subspinescens Cushman, MPC-26159 from sample MK01 (Yonahama F., PL2). 24. Bolivina cf. yabei Takayanagi, MPC-26163 from sample MK01 (Yonahama F., PL2). 25, 26. Bolivina sp.A, 25: MPC-26164 from sample 11 (Onogoshi F., ?PL1); 26: MPC-26165 from sample 16 (Yonahama F., PL3). 27. Bolivina translucens Phleger and Parker, MPC-26160 from sample 5-2 (Minebari F., PL5).

 figure22

FIGURE 23. Family Bolivinidae, Bolivinitidae, and Cassidulinidae. All scale bars = 0.1mm. 1, 2. Latibolivina subreticulata (Parr), 1: MPC-26346 from sample 2 (Minebari Formation, PL5); 2: MPC-26347 from sample 5-2 (Minebari F., PL5). 3, 4. Abditodentrix pseudothalmanni (Boltovskoy and Guissani de Kahn), 3: MPC-26105 from sample 7 (Yonahama F., PL4); 4: MPC-26106 from sample 15 (Yonahama F., PL3). 5, 6. Bolivinita quadrilatera (Schwager), 5: MPC-26166 from sample 5-2 (Minebari F., PL5); 6: MPC-26167 from sample MK02B (Minebari F., PL5). 7, 8. Cassidulina carinata Silvestri, 7: MPC-26189 from sample MK01 (Yonahama F., PL2); 8: MPC-26190 from sample MK02B (Minebari F., PL5). 9. Cassidulina cf. laevigata d'Orbigny, MPC-26191 from sample 2-2 (Minebari F., PL5). 10, 11. Cassidulina reniforme Nørvang, 10: MPC-26192 from sample 1 (Minebari F., PL5); 11: MPC-26193 from sample 11 (Onogoshi F., ?PL1). 12, 13. Evolvocassidulina belfordi Nomura, 12: MPC-26249 from sample 14-2 (Yonahama F., PL4); 13: MPC-26250 from sample MK02B (Minebari F., PL5). 14. Evolvocassidulina bradyi (Norman), MPC-26251 from sample 1 (Minebari F., PL5). 15, 16. Evolvocassidulina brevis (Aoki), 15: MPC-26252 from sample 5 (Minebari F., PL5); 16: MPC-26253 from sample 5-2 (Minebari F., PL5). 17, 18. Globocassidulina bisecta Nomura, 17: MPC-26284 from sample 1 (Minebari F., PL5); 18: MPC-26285 from sample 11 (Onogoshi F., ?PL1). 19, 20. Globocassidulina crassa (d'Orbigny), 19: MPC-26286 from sample MK01 (Yonahama F., PL2); 20: MPC-26287 from sample MK02B (Minebari F., PL5). 21, 22. Globocassidulina decorata (Sidebottom), 21: MPC-26288 from sample 8-2 (Yonahama F., PL4); 22: MPC-26289 from sample 14 (Yonahama F., PL4).

 figure23

FIGURE 24. Family Cassidulinidae and Stainforthiidae. All scale bars = 0.1mm. 1, 2. Globocassidulina okinawaensis (LeRoy), 1: MPC-26290 from sample 14-2 (Yonahama Formation., PL4); 2: MPC-26291 from sample MK02A (Minebari F., PL5). 3, 4. Globocassidulina subglobosa (Brady), 3: MPC-26292 from sample 17 (Yonahama F., PL2); 4: MPC-26293 from sample MK01 (Yonahama F., PL2). 5. Lernella inflata (LeRoy), MPC-26366 from sample 12 (Minebari F., PL5). 6. Paracassidulina sagamiensis (Asano and Nakamura), MPC-26403 from sample 7 (Yonahama F., PL4). 7, 8. Burseolina pacifica (Cushman), 7: MPC-26185 from sample 2 (Minebari F., PL5); 8: MPC-26186 from sample 2-2 (Minebari F., PL5). 9, 10. Ehrenbergina carinata Eade, 9: MPC-26226 from sample 14 (Yonahama F., PL4); 10: MPC-26227 from sample 14-2 (Yonahama F., PL4). 11, 12. Ehrenbergina trigona Goës, 11: MPC-26228 from sample 2 (Minebari F., PL5); 12: MPC-26229 from sample MK02A (Minebari F., PL5). 13, 14. Stainforthia ishikiensis (Asano), 13: MPC-26508 from sample 14 (Yonahama F., PL4); 14: MPC-26509 from sample 14-2 (Yonahama F., PL4).

figure24 

FIGURE 25. Family Stainforthiidae and Siphogenerinoididae. All scale bars = 0.1mm. 1, 2. Stainforthia tenuata (Cushman), 1: MPC-26510 from sample 8-2 (Yonahama Formation, PL4); 2: MPC-26511 from sample 15 (Yonahama F., PL3). 3, 4. Euloxostomum bradyi (Asano), 3: MPC-26239 from sample 8-2 (Yonahama F., PL4); 4: MPC-26240 from sample MK02B (Minebari F., PL5). 5, 6. Euloxostomum pseudobeyrichi (Cushman), 5: MPC-26241 from sample 5 (Minebari F., PL5); 6: MPC-26242 from sample 5-2 (Minebari F., PL5). 7, 8. Hopkinsinella glabra (Millett), 7: MPC-26326 from sample 1 (Minebari F., PL5); 8: MPC-26327 from sample 14-2 (Yonahama F., PL4). 9, 10. Rectobolivina asanoi Murata, 9: MPC-26453 from sample 18 (Oura F., ?PL1); 10: MPC-26454 from sample MK02A (Minebari F., PL5); 9 microspheric form, 10 megalospheric form. 11, 12. Rectobolivina bifrons (Brady), 11: MPC-26455 from sample 17 (Yonahama F., PL2); 12: MPC-26456 from sample MK01 (Yonahama F., PL2); 11 microspheric form, 12 megalospheric form. 13, 14. Rectobolivina sp.A, 13: MPC-26457 from sample 6 (Yonahama F., PL2); 14: MPC-26458 from sample 17 (Yonahama F., PL2). 15. Sagrinella convallaria (Millett), MPC-26476 from sample 10 (Onogoshi F., PL2). 16, 17. Sagrinella durrandii (Millett), 16: MPC-26477 from sample 1 (Minebari F., PL5); 17: MPC-26478 from sample 5 (Minebari F., PL5). 18, 19. Sagrinella jugosa (Brady), 18: MPC-26479, 19: MPC-26480, both from sample MK01 (Yonahama F., PL2). 20, 21. Saidovina formosana (Nakamura), 20: MPC-26481, 21: MPC-26482, both from sample 18 (Oura F., ?PL1). 22, 23. Saidovina karreriana (Brady), 22: MPC-26483 from sample 5 (Minebari F., PL5); 23: MPC-26484 from sample MK02B (Minebari F., PL5). 24, 25. Rectuvigerina striata (Schwager), 24: MPC-26459 from sample 8-2 (Yonahama F., PL4); 25: MPC-26460 from sample 14 (Yonahama F., PL4). 26. Allassoida tonohamaensis (Takayanagi), MPC-26110 from sample 1-2 (Minebari F., PL5).

 figure25

FIGURE 26. Family Buliminidae, Buliminellidae, and Uvigerinidae. All scale bars = 0.1mm, unless otherwise indicated. 1, 2. Bulimina aculeata d'Orbigny, 1: MPC-26168 from sample 8 (Yonahama Formation, PL4); 2: MPC-26169 from sample 8-2 (Yonahama F., PL4). 3, 4. Bulimina aff. kochiensis Takayanagi, 3: MPC-26174 from sample 1 (Minebari F., PL5); 4: MPC-26175 from sample 2 (Minebari F., PL5). 5, 6. Bulimina gutta Cushman and Parr, 5: MPC-26170 from sample 14 (Yonahama F., PL4); 6: MPC-26171 from sample 14-2 (Yonahama F., PL4). 7, 8. Bulimina inflata Seguenza, 7: MPC-26172, 8: MPC-26173, both from sample MK01 (Yonahama F., PL2). 9, 10. Bulimina marginata d'Orbigny, 9: MPC-26176 from sample MK01 (Yonahama F., PL2); 10: MPC-26177 from sample MK02B (Minebari F., PL5). 11, 12. Bulimina striata d'Orbigny, 11: MPC-26178 from sample 3-2-low-silt (Onogoshi F., PL1); 12: MPC-26179 from sample 4-2 (Minebari F., PL5). 13, 14. Bulimina subornata Brady, 13: MPC-26180 from sample 5 (Minebari F., PL5); 14: MPC-26181 from sample MK02B (Minebari F., PL5). 15, 16. Bulimina truncana Gümbel, 15: MPC-26182 from sample 7 (Yonahama F., PL4); 16: MPC-26183 from sample 14-2 (Yonahama F., PL4). 17—19. Globobulimina pyrula (d'Orbigny), 17: MPC-26281 from sample 17 (Yonahama F., PL2); 18: MPC-26282 from sample MK02B (Minebari F., PL5); 19: MPC-26283 from sample 2-2 (Minebari F., PL5). 20. Buliminella elegantissima (d'Orbigny), MPC-26184 from sample MK02B (Minebari F., PL5). 21, 22. Euuvigerina asperula (Cžjžek), 21: MPC-26243 from sample 8 (Yonahama F., PL4); 22: MPC-26244 from sample 16 (Yonahama F., PL3). 23, 24. Euuvigerina canariensis (d'Orbigny), 23: MPC-26245 from sample 2 (Minebari F., PL5); 24: MPC-26246 from sample MK02A (Minebari F., PL5).

 figure26

FIGURE 27. Family Uvigerinidae, Reussellidae, Fursenkoinidae, and Pleurostomellidae. All scale bars = 0.1mm. 1, 2. Euuvigerina vadescens (Cushman), 1: MPC-26247 from sample 10 (Onogoshi Formation, PL2); 2: MPC-26248 from sample 11 (Onogoshi F., ?PL1). 3—5. Uvigerina flintii Cushman, 3: MPC-26519 from sample 2-2 (Minebari F., PL5); 4: MPC-26520 from sample 3 (Onogoshi F., PL1); 5: MPC-26521 from sample 17 (Yonahama F., PL2). 6, 7. Uvigerina peregrina Cushman, 6: MPC-26522 from sample 6 (Yonahama F., PL2); 7: MPC-26523 from sample 6-2 (Yonahama F., PL2). 8. Uvigerina schencki Asano, MPC-26524 from sample 2 (Minebari F., PL5). 9. Uvigerina schwageri Brady, MPC-26525 from sample 5-2 (Minebari F., PL5). 10, 11. Angulogerina angulosa (Williamson), 10: MPC-26125 from sample MK01 (Yonahama F., PL2); 11: MPC-26126 from sample MK02B (Minebari F., PL5). 12, 13. Trifarina bradyi Cushman, 12: MPC-26517 from sample 3-2-up-sand (Onogoshi F., PL1); 13: MPC-26518 from sample 8 (Yonahama F., PL4). 14, 15. Reussella pulchra Cushman, 14: MPC-26461 from sample 2 (Minebari F., PL5); 15: MPC-26462 from sample MK01 (Yonahama F., PL2). 16. Fursenkoina acuta (d'Orbigny), MPC-26274 from sample 4-2 (Minebari F., PL5). 17—19. Neocassidulina hadai (Uchio), 17: MPC-26384 from sample 1 (Minebari F., PL5); 18: MPC-26385 from sample 15 (Yonahama F., PL3); 19: MPC-26386 from sample 16 (Yonahama F., PL3). 20, 21. Rutherfordoides mexicanus (Cushman), 20: MPC-26472 from sample 4 (Minebari F., PL5); 21: MPC-26473 from sample 5 (Minebari F., PL5). 22, 23. Rutherfordoides virgus (Nomura), 22: MPC-26474 from sample 1 (Minebari F., PL5); 23: MPC-26475 from sample 3-2-low-silt (Onogoshi F., PL1). 24, 25. Pleurostomella acuminata Cushman, 24: MPC-26420 from sample 7 (Yonahama F., PL4); 25: MPC-26421 from sample 17 (Yonahama F., PL2). 26—28. Pleurostomella alternans Schwager, 26: MPC-26422 from sample 7 (Yonahama F., PL4); 27: MPC-26423 and 28: MPC-26424 from sample 8-2 (Yonahama F., PL4); 27 large variation.

 figure27

FIGURE 28. Family Stilostomellidae and Bagginidae. All scale bars = 0.1mm. 1, 2. Myllostomella fijiensis (Cushman), 1: MPC-26382 from sample 7 (Yonahama Formation, PL4); 2: MPC-26383 from sample 15 (Yonahama F., PL3); 3, 4. Strictocostella hyugaensis (Ishizaki), 3: MPC-26513 from sample 3-2-low-silt (Onogoshi F., PL1); 4: MPC-26514 from sample 7 (Yonahama F., PL4). 5. Orthomorphina perversa (Schwager), MPC-26398 from sample 4-2 (Minebari F., PL5). 6, 7. Siphonodosaria aff. consobrina (d'Orbigny), 6: MPC-26495, 7: MPC-26496, both from sample 14-2 (Yonahama F., PL4). 8, 9. Siphonodosaria hayasakai (Ishizaki), 8: MPC-26497 from sample 4 (Minebari F., PL5); 9: MPC-26498 from sample 6 (Yonahama F., PL2). 10, 11. Siphonodosaria longispina (Egger), 10: MPC-26499 from sample 8 (Yonahama F., PL4); 11: MPC-26500 from sample 8-2 (Yonahama F., PL4). 12, 13. Siphonodosaria ketienziensis (Ishizaki), 12: MPC-26501 from sample 14 (Yonahama F., PL4); 13: MPC-26502 from sample 14-2 (Yonahama F., PL4). 14, 15. Siphonodosaria lepidula (Schwager), 14: MPC-26503 from sample 5 (Minebari F., PL5); 15: MPC-26504 from sample MK01 (Yonahama F., PL2). 16, 17. Strictocostella modesta (Bermudez), 16: MPC-26515 from sample 14 (Yonahama F., PL4); 17: MPC-26516 from sample 16 (Yonahama F., PL3); 16, apertural projection broken. 18, 19. Baggina totomiensis Makiyama, 18: MPC-26138 from sample 3 (Onogoshi F., PL1); 19: MPC-26139 from sample 11 (Onogoshi F., ?PL1). 20, 21. Cancris auriculus (Fichtel and Moll), 20: MPC-26187 from sample 2 (Minebari F., PL5); 21: MPC-26188 from sample 18 (Oura F., ?PL1). 22, 23. Valvulineria glabra Cushman, 22: MPC-26531 from sample MK02B (Minebari F., PL5); 23: MPC-26532 from sample 14-2 (Yonahama F., PL4).

 figure28

FIGURE 29. Family Discorbidae, Rosalinidae, Sphaeroidinidae, Glabratellidae, Siphonidae, and Parrelloididae. All scale bars = 0.1mm. 1, 2. Rotorbis auberi (d'Orbigny), 1: MPC-26470 from sample 4 (Minebari Formation, PL5); 2: MPC-26471 from sample 12 (Minebari F., PL5). 3, 4. Neoeponides bradyi Le Calvez, 3: MPC-26387 from sample 2-2 (Minebari F., PL5); 4: MPC-26388 from sample 6-2 (Yonahama F., PL2). 5. Strebloides advenus (Cushman), MPC-26512 from sample 8-2 (Yonahama F., PL4). 6, 7. Gavelinopsis lobatulus (Parr), 6: MPC-26275 from sample 15 (Yonahama F., PL3); 7: MPC-26276 from sample MK01 (Yonahama F., PL2). 8, 9. Gavelinopsis praegeri (Heron-Allen and Earland), 8: MPC-26277 from sample 11 (Onogoshi F., ?PL1); 9: MPC-26278 from sample 18 (Oura F., ?PL1). 10, 11. Planodiscorbis rarescens (Brady), 10: MPC-26411 from sample 2 (Minebari F., PL5); 11: MPC-26412 from sample 3-2-up-sand (Onogoshi F., PL1). 12. Rosalina australis (Parr), MPC-26463 from sample MK01 (Yonahama F., PL2). 13, 14. Rosalina globularis d'Orbigny, 13: MPC-26464 from sample 5-2 (Minebari F., PL5); 14: MPC-26465 from sample MK01 (Yonahama F., PL2). 15, 16. Sphaeroidina bulloides d'Orbigny, 15: MPC-26505 from sample 3-2-low-silt (Onogoshi F., PL1); 16: MPC-26506 from sample MK01 (Yonahama F., PL2). 17, 18. Murrayinella globosa (Millett), 17: MPC-26380 from sample 1 (Minebari F., PL5); 18: MPC-26381 from sample 14-2 (Yonahama F., PL4). 19. Planoglabratella opercularis (d'Orbigny), MPC-26413 from sample MK02B (Minebari F., PL5), juvenile specimen. 20, 21. Siphonina australis Cushman, 20: MPC-26493 from sample 15 (Yonahama F., PL3); 21: MPC-26494 from sample MK01 (Yonahama F., PL2). 22—24. Cibicidoides ornatus (Cushman), 22: MPC-26200 from sample 6 (Yonahama F., PL2); 23: MPC-26201 from sample MK01 (Yonahama F., PL2); 24: MPC-26202 from sample 4-2 (Minebari F., PL5).

 figure29

FIGURE 30. Family Parrelloididae, Pseudoparrellidae, Discorbinellidae, and Planulinidae. All scale bars = 0.1mm. 1—4. Cibicidoides pachyderma (Rzehak), 1: MPC-26203 from sample MK01 (Yonahama Formation, PL2); 2: MPC-26204 from sample 4-2 (Minebari F., PL5); 3: MPC-26205 from sample 3-2-up-sand (Onogoshi F., PL1); 4: MPC-26206 from sample 5-2 (Minebari F., PL5); 3 and 4, inflate-chamber variation. 5, 6. Cibicidoides sp.A, 5: MPC-26207, 6: MPC-26208, both from sample MK01 (Yonahama F., PL2). 7, 8. Parrelloides bradyi (Trauth), 7: MPC-26409 from sample 7 (Yonahama F., PL4); 8: MPC-26410 from sample MK01 (Yonahama F., PL2). 9, 10. Alabaminoides exiguus (Brady), 9: MPC-26108 from sample MK01 (Yonahama F., PL2); 10: MPC-26109 from sample MK02A (Minebari F., PL5). 11, 12. Eilohedra rotunda (Husezima and Maruhasi), 11: MPC-26230 from sample 1-2 (Minebari F., PL5); 12: MPC-26231 from sample MK02B (Minebari F., PL5). 13, 14. Facetocochlea pulchra (Cushman), 13: MPC-26255 from sample 3-2-low-silt (Onogoshi F., PL1); 14: MPC-26256 from sample 5-2 (Minebari F., PL5). 15. Discorbinella montereyensis Cushman and Martin, MPC-26223 from sample 12 (Minebari F., PL5). 16, 17. Laticarinina pauperata (Parker and Jones), 16: MPC-26348 from sample 7 (Yonahama F., PL4); 17: MPC-26349 from sample MK01 (Yonahama F., PL2). 18—21. Hyalinea balthica (Schröter), 18: MPC-26328 from sample MK01 (Yonahama F., PL2); 19: MPC-26329 from sample MK02B (Minebari F., PL5); 20: MPC-26330 from sample 5 (Minebari F., PL5); 21: MPC-26331 from sample 5-2 (Minebari F., PL5); 20 and 21, inflated-chamber variation.

 figure30

FIGURE 31. Family Planulinidae, Cibicididae, Epistomariidae, Amphisteginidae, and Nonionidae. All scale bars = 0.1mm. 1, 2. Planulina retia Belford, 1: MPC-26416 from sample 2 (Minebari Formation, PL5); 2: MPC-26417 from sample 5-2 (Minebari F., PL5). 3, 4. Cibicides refulgens de Montfort, 3: MPC-26197 from sample 2-2 (Minebari F., PL5); 4: MPC-26198 from sample 14-2 (Yonahama F., PL4). 5. Cibicides tenuimargo (Brady), MPC-26199 from sample 4-2 (Minebari F., PL5); stripe pattern on the dorsal side implies attached material. 6, 7. Fontbotia wuellerstorfi (Schwager), 6: MPC-26272 from sample MK01 (Yonahama F., PL2); 7: MPC-26273 from sample MK02A (Minebari F., PL5). 8, 9. Lobatula lobatula (Walker and Jacob), 8: MPC-26367 from sample 5 (Minebari F., PL5); 9: MPC-26368 from sample 5-2 (Minebari F., PL5). 10, 11. Dyocibicides biserialis Cushman and Valentine, 10: MPC-26224 from sample 2-2 (Minebari F., PL5); 11: MPC-26225 from sample 3-2-up-sand (Onogoshi F., PL1). 12—14. Pseudoeponides japonicus Uchio, 12: MPC-26430 from sample 14 (Yonahama F., PL4); 13: MPC-26431 and 14: MPC-26548 from sample MK02B (Minebari F., PL5); arrows in 14 shows slit opening along dorsal sutures. 15, 16. Amphistegina lessonii d'Orbigny, 15: MPC-26123 from sample 2 (Minebari F., PL5); 16: MPC-26124 from sample 2-2 (Minebari F., PL5); all specimens of this study are juveniles. 17, 18. Nonion japonicum Asano, 17: MPC-26392 from sample 5-2 (Minebari F., PL5); 18: MPC-26393 from sample 11 (Onogoshi F., ?PL1). 19, 20. Nonionellina labradorica (Dawson), 19: MPC-26394 from sample 1-2 (Minebari F., PL5); 20: MPC-26395 from sample MK02B (Minebari F., PL5). 21, 22. Pseudononion cuevasensis Saunder and Müller-Merz, 21: MPC-26438 from sample 10 (Onogoshi F., PL2); 22: MPC-26439 from sample MK02B (Minebari F., PL5). 23, 24. Pseudononion subcostatum Fujita and Ito, 23: MPC-26440 from sample 14-2 (Yonahama F., PL4); 24: MPC-26441 from sample MK02B (Minebari F., PL5).

figure31 

FIGURE 32. Family Nonionidae, Chilostomellidae, Alabaminidae, Osangulariidae, and Oridorsalidae. All scale bars = 0.1mm. 1. Astrononion hayamaense Kurihara, MPC-26136 from sample 18 (Oura Formation, ?PL1). 2. Astrononion stelligerum (d'Orbigny), MPC-26137 from sample MK01 (Yonahama F., PL2). 3, 4. Fijinonion fijiensis (Cushman and Edwards), 3: MPC-26259, 4: MPC-26260, both from sample 2-2 (Minebari F., PL5). 5. Laminononion tumidum (Cushman and Edwards), MPC-26345 from sample 15 (Yonahama F., PL3). 6, 7. Pacinonion umbilicatulum (Uchio), 6: MPC-26401 from sample 1 (Minebari F., PL5); 7: MPC-26402 from sample 12 (Minebari F., PL5). 8, 9. Melonis barleeanum (Williamson), 8: MPC-26370 from sample MK01 (Yonahama F., PL2); 9: MPC-26371 from sample MK02 (Minebari F., PL5). 10, 11. Melonis pacificum (Cushman), 10: MPC-26372 from sample 5-2 (Minebari F., PL5); 11: MPC-26373 from sample MK02B (Minebari F., PL5). 12—14. Melonis pompilioides (Fichtel and Moll), 12: MPC-26374 from sample 3 (Onogoshi F., PL1); 13: MPC-26375 from sample 3-2-up-sand (Onogoshi F., PL1); 14: MPC-26376 from sample MK01 (Yonahama F., PL2). 15, 16. Pullenia bulloides (d'Orbigny), 15: MPC-26443 from sample 6 (Yonahama F., PL2); 16: MPC-26442 from sample MK01 (Yonahama F., PL2). 17, 18. Pullenia quinqueloba (Reuss), 17: MPC-26444 from sample 1 (Minebari F., PL5); 18: MPC-26445 from sample 7 (Yonahama F., PL4). 19. Chilostomella cushmani Chapman, MPC-26194 from sample 5 (Minebari F., PL5). 20. Alabamina japonica (Asano), MPC-26107 from sample 12 (Minebari F., PL5). 21, 22. Osangularia culter (Parker and Jones), 21: MPC-26399 from sample 7 (Yonahama F., PL4); 22: MPC-26400 from sample 16 (Yonahama F., PL3). 23, 24. Oridorsalis umbonatus (Reuss), 23: MPC-26396 from sample 1-2 (Minebari F., PL5); 24: MPC-26397 from sample MK01 (Yonahama F., PL2).

 figure32

FIGURE 33. Family Heterolepidae and Gavelinellidae. All scale bars = 0.1mm, unless otherwise indicated. 1, 2. Anomalinoides glabratus (Cushman), 1: MPC-26127 from sample 3 (Onogoshi Formation, PL1); 2: MPC-26128 from sample 3-2-up-sand (Onogoshi F., PL1). 3, 4. Anomalinoides globulosus (Chapman and Parr), 3: MPC-26129, 4: MPC-26130, both from sample 10 (Onogoshi F., PL2). 5—7. Heterolepa dutemplei (d'Orbigny), 5: MPC-26317 and 6: MPC-26318, from sample MK01 (Yonahama F., PL2); 7: MPC-26319 from sample 18 (Oura F., ?PL1); 5: plano-convex, acute-periphery morphotype; 6: biconvex, round-periphery morphotype; 7: umbilico-convex, acute periphery morphotype. 8, 9. Heterolepa praecincta (Karrer), 8: MPC-26320 from sample 2-2 (Minebari F., PL5); 9: MPC-26321 from sample 6-2 (Yonahama F., PL2). 10, 11. Gyroidinoides altiformis (Stewart and Stewart), 10: MPC-26300 from sample 3 (Onogoshi F., PL1); 11: MPC-26301 from sample 18 (Oura F., ?PL1). 12, 13. Gyroidinoides broeckhiana (Karrer), 12: MPC-26302 from sample 5-2 (Minebari F., PL5); 13: MPC-26303 from sample MK01 (Yonahama F., PL2).

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FIGURE 34. Family Gavelinellidae. All scale bars = 0.1mm. 1, 2. Gyroidinoides aff. gemmus (Bandy), 1: MPC-26304 from sample 17 (Yonahama Formation, PL2); 2: MPC-26305 from sample MK01 (Yonahama F., PL2). 3, 4. Gyroidinoides soldanii (d'Orbigny), 3: MPC-26306 from sample 3-2-low-silt (Onogoshi F., PL1); 4: MPC-26307 from sample MK01 (Yonahama F., PL2). 5, 6. Gyroidinoides sp.A, 5: MPC-26308 from sample 3-2-low-silt (Onogoshi F., PL1); 6: MPC-26309 from sample 8 (Yonahama F., PL4). 7, 8. Gyroidina nipponica Ishizaki, 7: MPC-26296 from sample 11 (Onogoshi F., ?PL1); 8: MPC-26297 from sample MK02B (Minebari F., PL5). 9, 10. Gyroidina sp.A, 9: MPC-26298 from sample 15 (Yonahama F., PL3); 10: MPC-26299 from sample MK02A-2 (Minebari F., PL5). 11, 12. Hanzawaia asterizana (Fichtel and Moll), 11: MPC-26310 from sample 2 (Minebari F., PL5); 12: MPC-26311 from sample MK02A (Minebari F., PL5). 13. Hanzawaia cf. coronata (Heron-Allen and Earland), MPC-26312 from sample MK01 (Yonahama F., PL2). 14, 15. Hanzawaia nipponica Asano, 14: MPC-26313 from sample 4 (Minebari F., PL5); 15: MPC-26314 from sample 18 (Oura F., ?PL1).

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FIGURE 35. Family Rotaliidae. All scale bars = 0.1mm, unless otherwise indicated. 1, 2. Pararotalia cf. nipponica (Asano), 1: MPC-26407, 2: MPC-26408, both from sample MK02B (Minebari Formation, PL5). 3—6. Ammonia maruhasii (Kuwano), 3: MPC-26112 from sample 18 (Oura F., ?PL1); 4: MPC-26113 from sample MK02B (Minebari F., PL5); 5: MPC-26114 from sample 3-2-up-sand (Onogoshi F., PL1); 6: MPC-26115 from sample MK01 (Yonahama F., PL2); 5 and 6, high trochospiral variety. 7, 8. Ammonia parkinsoniana (d'Orbigny), 7: MPC-26116 from sample 14 (Yonahama F., PL4); 8: MPC-26117 from sample 14-2 (Yonahama F., PL4). 9, 10. Asterorotalia pulchella (d'Orbigny), 9: MPC-26134 from sample 10 (Onogoshi F., PL2); 10: MPC-26135 from sample 18 (Oura F., ?PL1). 11, 12. Rotalinoides compressiuscula (Brady), 11: MPC-26466 from sample 5-2 (Minebari F., PL5); 12: MPC-26467 from sample 18 (Oura F., ?PL1).

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FIGURE 36. Family Rotaliidae and Elphidiidae. All scale bars = 0.1mm, unless otherwise indicated. 1, 2. Rotalinoides gaimardii (Fornasini), 1: MPC-26468 from sample 3-2-up-sand (Onogoshi Formation, PL1); 2: MPC-26469 from sample 18 (Oura F., ?PL1). 3, 4. Cribroelphidium clavatum (Cushman), 3: MPC-26210 from sample 2 (Minebari F., PL5); 4: MPC-26211 from sample MK02B (Minebari F., PL5). 5, 6. Cribroelphidium subincertum (Asano), 5: MPC-26212 from sample 1 (Minebari F., PL5); 6: MPC-26213 from sample 1-2 (Minebari F., PL5). 7, 8. Cribroelphidium sp.A, 7: MPC-26214 from sample 14 (Yonahama F., PL4); 8: MPC-26215 from sample 14-2 (Yonahama F., PL4). 9, 10. Elphidium advenum (Cushman), 9: MPC-26232 from sample 5 (Minebari F., PL5); 10: MPC-26233 from sample MK02A (Minebari F., PL5). 11, 12. Elphidium crispum (Linnaeus), 11: MPC-26234 from sample 2 (Minebari F., PL5); 12: MPC-26235 from sample 16 (Yonahama F., PL3). 13, 14. Elphidium aff . neosimplex (McCulloch), 13: MPC-26236 from sample 11 (Onogoshi F., ?PL1); 14: MPC-26237 from sample 18 (Oura F., ?PL1). 15. Elphidium planulatum (Lamarck), MPC-26238 from sample 5-2 (Minebari F., PL5); broken specimen. 

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