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Angiosperm pollen grains from the Cuayuca Formation (Late Eocene to Early Oligocene), Puebla, Mexico

Elia Ramírez-Arriaga, Mercedes B. Prámparo, and Enrique Martínez-Hernández

Plain Language Abstract

The present contribution describes pollen morphology of flowering plants from the Cuayuca Formation (Mexico), which includes semiarid vegetation such as tropical deciduous forest, chaparral, arid tropical scrub and temperate flora of Pinus and cloud forests. Pollen grain taxonomy is a valuable tool for understanding the evolution of Mexican plant diversity. Most of these plant families are currently part of the vegetation that has been growing within the Balsas Basin region since the Paleogene.

Resumen en Español

Granos de polen de angiospermas de la Formación Cuayuca (Eoceno tardío a Oligoceno temprano), Puebla, México

Se ilustran y se describen sistemáticamente los granos de polen de angiospermas mejor conservados (Monocotyledonae ó o Liliopsida: n= 7 y Dicotyledonae ó o Magnoliopsida: n= 41) recuperados de la Formación Cuayuca (Eoceno tardío-Oligoceno temprano) en Puebla, México, algunos de ellos de importancia cronoestratigráfica (Aglaoreidia pristina, Armeria, Bombacacidites, Corsinipollenites, Eucommia, Favitricolporites, Intratriporopollenites, Lymingtonia, Magnaperiporites, Malvacipollis spinulosa, Margocolporites aff. vanwijhei, Momipites coryloides, Momipites tenuipolus, Mutisiapollis, Ranunculacidites operculatus, y Thomsonipollis sabinetownensis). Los taxones identificados en la Formación Cuayuca sugieren vegetación semiárida local tal como selva baja caducifolia, chaparral, pastizal y matorral xerófilo, en donde dominan las angiospermas. No obstante, los taxones templados del bosque de pino y bosque mesófilo de montaña estuvieron también presentes en la vegetación regional. Resulta notorio que en la actualidad tales taxones estén bien representados en la vegetación de la Cuenca del Río Balsas, lo cual podría sugerir la existencia de este tipo de flora en la región de Cuayuca desde el Oligoceno.

Palabras clave: palinología sistemática; granos de polen de angiospermas; Formación Cuayuca; vegetación paleógena; cuencas cenozoicas mexicanas

Traducción: Enrique Peñalver

Résumé en Français

Des grains de pollen d'angiospermes de la Formation Cuayuca (Eocène supérieur à Oligocène inférieur), Puebla, Mexique

Des descriptions et illustrations systématiques de grains de pollen d'angiospermes les mieux conservés (Monocotyledonae ou Liliopsida: n = 7 et Dicotyledonae ou Magnoliopsida: n = 41) récupérés dans la Formation Cuayuca (Eocène supérieur-Oligocène inférieur), dans l'État de Puebla, au Mexique, sont fournies ici, certaines d'entre elles d'une importance chronostratigraphique (Aglaoreidia pristina, Armeria, Bombacacidites, Corsinipollenites, Eucommia, Favitricolporites, Intratriporopollenites, Lymingtonia, Magnaperiporites, Malvacipollis spinulosa, Margocolporites aff. vanwijhei, Momipites coryloides, Momipites tenuipolus, Mutisiapollis, Ranunculacidites operculatus, et Thomsonipollis sabinetownensis). Les taxons identifiés de la Formation Cuayuca suggèrent une végétation semi-aride locale tels qu'une forêt tropicale à feuilles caduques, chaparral, prairies, et des broussailles tropicales arides, dans lesquelles les angiospermes sont l'un des principaux représentants. Néanmoins, les taxons de forêt tempérée de forêts de Pinus et de brouillard ont été également enregistrés dans la végétation régionale. Il est à noter qu'à l'heure actuelle, ces taxons sont bien représentés dans la végétation du bassin de la rivière Balsas, ce qui suggère l'existence de ce type de flore dans la région Cuayuca depuis l'Oligocène.

Mots-clés: palynologie systématique; grains de pollen d'angiospermes; Formation Cuayuca; végétation Paléogène; Bassins mexicain Cénozoïque

Translator: Kenny J. Travouillon

Deutsche Zusammenfassung

Angiospermen-Pollen aus der Cuayuca Formation (spätes Eozän bis frühes Oligozän), Puebla, Mexiko

Es werden systematische Beschreibungen und Illustrationen der am besten erhaltenen Pollen (Monocotyledonae oder Liliopsida: n= 7 und Dicotyledonae oder Magnoliopsida: n= 41) aus der Cuayuca Formation (spätes Eozän-frühes Oligozän), Puebla Staat, Mexiko zur Verfügung gestellt, einige davon mit chronostratigrafischer Bedeutung. (Aglaoreidia pristina, Armeria, Bombacacidites, Corsinipollenites, Eucommia, Favitricolporites, Intratriporopollenites, Lymingtonia, Magnaperiporites, Malvacipollis spinulosa, Margocolporites aff. vanwijhei, Momipites coryloides, Momipites tenuipolus, Mutisiapollis, Ranunculacidites operculatus und Thomsonipollis sabinetownensis). Die Taxa aus der Cuayuca Formation weisen auf eine lokal semiaride Vegetation hin wie tropische Laubwälder, Chaparral, Grasland und arides tropisches Buschland wo Angiospermen eine der Hauptvertreter waren. Allerdings wurden auch gemäßigte Taxa aus Pinienwäldern und Nebelwäldern aus der regionalen Vegetation registriert. Es ist bemerkenswert, dass solche Taxa heute in der Vegetation des Balsas River Beckens gut vertreten sind, was auf ein Vorkommen dieses Florentyps in der Cuayuca Region seit dem Oligozän hindeuten würde.

Schlüsselwörter: systematische Palynologie; angiosperme Pollenkörner; Cuayuca Formation; Paläogene Vegetation; Mexikanische känozoische Becken

Translator: Eva Gebauer

Arabic

465 arab

Translator: Ashraf M.T. Elewa

 

 

APPENDIX 3.

List of palynomorphs from Cuayuca Formation Mcy Member with identification numbers that correspond to the cladogram (Figure 9) obtained from the parsimony analysis of endemicity (PAE) anlaysis.

0

Deltoidospora

 

23

Fabaceae types

1

Leptolepidites

 

24

Momipites coryloides

2

Retitriletes

 

25

Momipites microcoryphaeus

3

Lusatisporis dettmannae

 

26

Momipites tenuipolus

4

Stereigranisporis granula

 

27

Momipites triradiatus

5

Laevigatosporites

 

28

Myrtaceidites

6

Polypodiisporites

 

29

Platanoidites

7

Cupressacites /Taxodiaceaepollenites

 

30

Ranunculacidites operculatus

8

Ephedripites

 

31

Quercoidites

9

Pinuspollenites /Piceapollis

 

32

Rhoipites aff. cryptoporus

10

Aglaoreidia

 

33

Rugulitriporites

11

Arecipites

 

34

Sapindaceidites

12

Monoporopollenites

 

35

Striatricolporites

13

Liliacidites

 

36

Thomsonipollis aff. sabinetawnensis

14

Polyadopollenites aff. pflugii

 

37

Aeschynomene

15

Alnus vera

 

38

Armeria type

16

Caryapollenites

 

39

Moraceae type

17

Casuarinidites

 

40

Sterculiaceae

18

Corsinipollenites

 

41

Typha type

19

Cupuliferoidaepollenites

 

42

Tubulifloridites

20

Chenopodipollis

 

43

Ulmoideipites

21

Eucommia

 

44

Leiosphaeridia

22

Juglanspollenites

 

 

 

 

APPENDIX 2.

Botanical affinity of Angiosperm pollen grains described from the Cuayuca Formation. Total number of genera (No. G) and species (spp.) reported currently in the Balsas River Basin region taken from Fernández-Nava et al. (1998).

 

BOTANICAL AFFINITY

Balsas River Basin region

No. G (spp.)

MONOCOTYLEDONEAE

 

 

Arecipites

Arecaceae

2(3)

Liliacidites

 

Liliaceae,

Amaryllidaceae,

Bromeliaceae

23(62)

11(49)

7 (59)

Monocolpopollenties aff. texensis

Monocotyledoneae

 

Monoporopollenites

Gramineae.

84 (253)

DICOTYLEDONEAE

 

 

Armeria

Armeria (Plumbaginaceae)

 

Bombacacidites

Bombacaceae

Sterculiaceae

Tiliaceae

3(5)

8 (21)

5 (19)

Casuarinidites

Casuarina (Casuarinaceae)

(1)

Chenopodipollis

Amaranthaceae

Chenopodiaceae

6 (20)

1 (4)

Corsinipollenites

Onagraceae.

8 (29)

Clavainaperturites

Croton (Euphorbiaceae)

(11)

Eucommia pollen type

Eucommia (Eucommiaceae)

 

Fabaceae pollen type

Fabaceae

90 (486)

Favitricolporites sp.

Aeschynomene (Fabaceae)

(13)

Glycydendron pollen type

Glycydendron (Euphorbiaceae)

 

Intratriporopollenites

Mortoniodendron (Graham, 1979) or Fremontodendron (Sterculiaceae)

8(21)

Landolphia pollen type

Landolphia (Apocynaceae).

 

Fabaceae pollen type

Fabaceae

90 (486)

Linum pollen type

Linum (Linaceae)

(2)

Lymingtonia

Nyctaginaceae and/or

Portulacaceae

9 (24)

4 (4)

Magnaperiporites

Nyctaginaceae

9 (24)

Malpighiaceoidites

Malpighiaceae

13 (33)

Margocolporites

Caesalpinia (Fabaceae).

(9)

Mutisiapollis

Mutisia (Compositae).

 

Perisyncolporites

Malpighiaceae

13 (33)

Polyadopollenites

Acacia (Fabaceae).

(27)

Polygalacidites

Polygalaceae.

3 (12)

Ranunculacidites cf. communis

Euphorbiaceae

18 (103)

Rhamnaceaepollenites

Rhamnaceae

6 (19)

Rhoipites

Araliaceae

4(8)

Brosipollis

Bursera (Burseraceae).

(43)

Sabicea pollen type

Probably Sabicea

(Rubiaceae)

23(66)

Striatricolporites

Anacardiaceae

10(20)

Tubulifloridites

Compositae

136 (573)

Ulmipollenites

Ulmaceae

3 (14)

 

APPENDIX 1.

List of angiosperm pollen grains described in the present work.

a.1. Monocotyledonae
a.1.1 Sulcate Arecipites sp.
  Liliacidites sp.1
  Liliacidites sp.2
  Liliacidites sp.3
  Monocolpopollenites aff. texensis Nichols, Ames and Traverse, 1973
   
a.1.2 Porate Aglaoreidia pristina Fowler 1971
  Monoporopollenites Potonié 1960
   
b.2. Dicotyledonae
b.2.1 Colpate  
b.2.1.1 Tricolpates Armeria pollen type
  Glycydendron pollen type
  Linum pollen type
  Ranunculacidites operculatus (Van der Hammen and Wijmstra 1964) Jaramillo and Dilcher 2001
b.2.1.2 Pericolpate Lymingtonia sp.
b.2.1.3 Syncolpate Polyadopollenites sp. 2
   
b.2.2 Tricolporoidate Eucommia pollen type
  Fabaceae pollen type 1
   
b.2.3 Colporate  
b.2.3.1 Tricolporate Bombacacidites sp.
  Landolphia pollen type
  Fabaceae pollen type 2
  Fabaceae pollen type 3
  Margocolporites aff. vanwijhei Germeraad, Hopping and Müller 1968
  Margocolporites sp.
  Mutisiapollis sp.
  Ranunculacidites cf. communis Sah 1967
  Rhamnaceaepollenites sp.
  Rhoipites aff. cryptoporus Srivastava 1972
  Rhoipites sp.
  Rugulitriporites sp.
  Striatricolporites sp.
  Tubulifloridites sp .
b.2.3.2 Stephanocolporate Polygalacidites sp.
b.2.3.3 Syncolporate Favitricolporites sp.
b.2.3.4 Perisyncolporate Malpighiaceoidites sp.
  Perisyncolporites sp.
   
b.2.4 Porate  
b.2.4.1 Triporate Casuarinidites sp.
  Corsinipollenites sp. 1
  Corsinipollenites sp. 2
  Corsinipollenites sp. 3
  Intratriporopollenites sp.
  Momipites coryloides Wodehouse 1933
  Momipites tenuipolus Anderson 1960
  Sabicea pollen type
  Thomsonipollis sabinetownensis Elsik
b.2.4.2 Tetraporate-pentaporate Ulmipollenites sp.
b.2.4.3 Stephanoporate Malvacipollis spinulosa Frederiksen 1
b.2.4.4 Periporate Chenopodipollis sp.
  Magnaperiporites sp.
   
b.2.5 Inaperturate Polyadopollenites sp. 1
  Clavainaperturites sp.
 

FIGURE 1. Location of the nine sections studied from the Cuayuca Formation, Puebla, Mexico. 1, Principal, “A” and “B” sections; 2, “F”, “H” and second sections; and 3, Lagunillas, Lagunillas de Rayón and Tzompahuacan sections.

 figure1

FIGURE 2. Stratigraphic columns with the location of the palynological samples studied from the Cuayuca Formation, Puebla, Mexico.

 figure2

FIGURE 3. Angiosperm pollen grains from the Cuayuca Formation. 1, Arecipites sp., Pb-9137(1): EF R41/1; 2-3, Liliacidites sp. 1, Pb-9136(1): EF U36/1); 4, Casuarinidites sp., Pb-9136(2): EF J41/3; 5, Monoporopollenites sp., Pb-9334(4): Y38/1; 6, Liliacidites sp. 2, Pb-9334(4): EF M31/3; 7 , Aglaoreidia pristina, Pb-9334(4): 96.6/4; 8, Liliacidites sp. 3, Pb-8871 (A): EF V41/4; 9, Chenopodipollis sp., Pb-9334(4): EF U43/1; 10, Favitricolporites sp., Pb-9138(’1): EF S32/3; 11, Armeria pollen type, Pb-9340(1): EF P33/3; 12-13, Fabaceae pollen type 1, Pb-9334(4): EF N37/1; 14-15, Glycydendron pollen type, Pb-8872(1): EF O45/2; 16, Eucommia sp., Pb-9334(1): EF E40/3; 17, Intratriporopollenites sp., Pb-9340(1): EF H27/3; 18-20, Fabaceae pollen type 2, Pb-8890(1): N27/4; 21-22, Rhoipites aff. cryptoporus , Pb-8890(1): EF Q30/2; 23, Bombacacidites sp., Pb-9334(4): EF V39/1. Scale bar represents 10 µm.

 figure3

FIGURE 4. Angiosperm pollen grains from the Cuayuca Formation. 1, Corsinipollenites sp. 1, Pb-9334(1): EF G33/3; 2, Corsinipollenites sp. 3, Pb-9334(4): EF R36/1; 3, Corsinipollenites sp. 2, Pb-9334(4): EF T35/3; 4-5, Margocolporites sp., Pb-9340(1): EF N35/3; 6, Margocolporites aff. vanwijhei , Pb-9334(1'): EF T39/2; 7, Monocolpopollenites aff. texensis Nichols, Ames and Traverse 1973 Pb-8872(1A): EF W29/1; 8-9 Rhoipites sp., Pb-8890(1):101.9/17.2; 10,  Lymingtonia sp., Pb-9334(4): EF S32/4; 11, Momipites tenuipolus Pb-9334(4): 101.6/12.5; 12, Momipites coryloides, Pb-9138’(1): 92.2/2.8; 13, Fabaceae pollen type 3, Pb-9334(4): EF M34/4; 14, Clavainaperturites sp., Pb-9147(2): EF R34/2; 15, Linum pollen type, Pb-9334 (1’): EF S33/2; 16, Magnaperiporites sp., Pb-9334(4): EF R39/2; 9. Scale bar represnts 10 µm.

 figure4

FIGURE 5. Angiosperm pollen grains from the Cuayuca Formation. 1, Polyadopollenites sp. 2, Pb-9334(4): EF R37/4; 2-3, Polyadopollenites sp. 1, Pb-9340(1): 101.4/12.6; 4, Landolphia pollen type, Pb-9334(1): EF T41/1; 5, Perisyncolporites sp., Pb-9334(4): EF E44/1; 6, 10, Malpighiaceoidites sp., Pb-9334(4): EF H42/2; 7, 11, Mutisiapollis sp., Pb-8872(3): EF P33/4; 8-9, Striatricolporites sp., Pb-9336(1): EF G32/1; 12, Malvacipollis spinulosa , Pb-9334(4): 94/7; 13, Ranunculacidites cf. communis , Pb-9334(4): EF D34/1/4; 14-15, Brosipollis sp., Pb-9334(4): EF U41/3; 16, Polyadopollenites sp. 1 Pb-9334(4): EF S39/4; 17, Tubulifloridites sp., Pb-9136(1): EF F39/4; 18, Ulmipollenites sp., Pb-9334(4): EF N40/1; 19, Thomsonipollis sabinetownensis , Pb-9334(4): 94.2/7.4; 20, Sabicea pollen type, Pb-9334(4): EF E42/1; 21, Ranunculacidites operculatus , Pb-9334(4): 101.8/7.2; 22 Rhamnaceaepollenites sp., Pb-9334(4): EF T32/2. Scale bar represents 10 µm.

 figure5

FIGURE 6. Hierarchical cluster of the Cuayuca Formation pollen grains. Names of taxa were highlighted according to the vegetation type in which they are usually found in present days in Mexico.

 figure6

FIGURE 7. PAE anlaysis between studied sections from the Cuayuca Formation Mcy member: second section, Izúcar de Matamoros (IzS); Tzompahuacan (Tzo); Lagunillas de Rayón (LagRay); Lagunillas (Lag); “B” section, Cuayuca (CyB); “F” section, Izúcar de Matamoros (IzF); “H” section, Izúcar de Matamoros (IzH); Principal section (CyPrincipal); “A” section (CyA).

 figure7

FIGURE 8. Paleopalynological assemblage of the Cuayuca Formation Mcy member and CONISS analysis. Sections were organized considering PAE analysis of Figure 7.

 figure8

FIGURE 9. Index taxa recovered from the Cuayuca Formation, Puebla.

 figure9

FIGURE 10. Correlations between two outcrops from the Izucar de Matamoros (F and H sections from the El Calvario) with the stratotype sections from the Cuayuca Formation.

 figure10

 

 

TABLE. List of angiosperm and gymnosperm pollen grains identified in Cuayuca Mcy Member: second section (Second); Tzompahuacan section (Tz); Lagunillas de Rayón section (LR); Lagunillas section (L); “B”section (“B”); “F” section (“F”); “H” section (“H”); Principal section (Principal); “A” section (“A”).

SECTIONS Second Tz LR L "B" "F" "H" Principal "A"
Samples Pb-8899 Pb-8902 Pb-9141 Pb-9515 Pb-9147 Pb-9343 Pb-8868 Pb-8869 Pb-8870 Pb-8871 Pb-8872 Pb-8890 Pb-8891 Pb-8896 Pb-8897 Pb-8898 Pb-9136 Pb-9137 Pb-9138 Pb-9334 Pb-9337 Pb-9339 Pb-9340
DYCOTYLEDONAE                                              
Alnus vera 1 11 1 3 3 2 1 1
Armeria sp. 2 1 2 1 2 1
Bombacacidites sp. 1 1
Brosipollis spp. 5 2 12 41 11
Caryophyllaceae type 1
Caryapollenites sp. 2 1 1 1 1
Casuarinidites sp. 1 1 2 1 3 1 4 1
Chenopodipollis sp. 1 2 3 1 2 6 3 12 92 65
Clavainaperturites sp. 1 1
Corsinipollenites spp. 4 1 2 4 2
Cupuliferoidaepollenites sp. 3
Cupuliferoipollenites sp. 1
Eucommia pollen type 3 1 1 10 2
Euphorbiaceae type 2 1
Fabaceae type 4 1 1 2
Favitricolporites sp. 1
Ficus type 1
Gesneriaceae type 1
Glycydendron pollen type 1
Intratriporopollenites sp. 1 1
Juglanspollenites sp. 1 1
Labiatae type 1
Landolphia pollen type 1 1 1
Linum pollen type 1
Lisianthus type 2
Liquidambarpollenites sp. 3 3
Lymingtonia sp. 3 1
Magnaperiporites sp. 1
Malpighiaceoidites sp. 5
Malvacipollis spinulosa 1 3
Margocolporites aff. vanwijhei 1
Margocolporites sp. 1
Meliaceae type 1
Mimosa type 1
Momipites coryloides 1 1 17 4 9 28 37 9 15
Momipites microcoryphaeus 3 11 7 9 1 27 5 7
Momipites tenuipolus 1
Momipites triradiatus 2
Moraceae type 1 3 1
Mutisiapollis sp. 1
Myrtaceidites sp. 1 1 1 2 1
Perisyncolporites sp. 1
Platanoidites sp. 2 1 4
Polyadopollenites aff. pflugii 1
Polyadopollenites spp. 2 1
Polygalacidites sp. 1
Polygonaceae type 2
Pterocaryapollenites sp. 1
Quercoidites sp. 1 8 1 3 2 1 3 3 2 6 1 1
Ranunculacidites cf. communis 1
Ranunculacidites operculatus 3 3 1
Rhamnaceaepollenites sp. 2
Rhoipites aff. cryptoporus 1 1
Rhoipites sp. 1 28 7 1 1
Sabicea pollen type 1
Salixpollenites sp. 1
Sapindaceidites sp. 2 1 1 4 12 4
Striatricolporites sp. 1 2 1 5 3 1 1
Striatricolporites sp.2 1 2 1 2 1
Thomsonipollis sabinetawnensis 1 1
Thymelaeaceae type 1
Tubulifloridites spp. 1 26 3 3 58 1 1 1 14 1 1
Ulmipollenites sp. 1 1 1 3 1 3 9 27
Urticaceae type 1
Valerianaceae type 1
Vitaceae type 2
MONOCOTYLEDONAE                                              
Aglaoreidia pristina 1
Aglaoreidia sp. 1 1
Annonaceae type 1
Arecipites sp.
4 2 3 2 2 2
Commelinaceae type 1
Cyperaceae type 2
Liliaciadites spp. 1 7 1 16 65 2 11 2 12 2 8
Monocolpopollenites aff. texensis 1
Typha type 1
GYMNOSPERMS                                              
Cupressacites/ Taxodiaceaepollenites 2 1 2
Ephedripites spp. 1 1 1 8 13 71
Piceapollis sp. 1
Pinuspollenites sp. 1 4 5 21 5 2 12 1 11 2 46 1 195 440 1 239
Pityosporites sp. 2
 

ramirezarriagaElia Ramírez-Arriaga
Departamento de Paleontología
Instituto de Geología
Universidad Nacional Autónoma de México
Av. Universidad 3000
Ciudad Universitaria
C.P. 04510
México, Distrito Federal
This email address is being protected from spambots. You need JavaScript enabled to view it.

ELIA RAMÍREZ ARRIAGA is a researcher at the Institute of Geology, Universidad Nacional Autónoma de México (UNAM). She received a B.S.c degree in Biology from the UNAM in 1989, majoring in Palynology, and has been working since 1992 in the UNAM Palynology Laboratory, Paleontology Department, Institute of Geology. She achieved an UNAM Ph.D. in Biological Sciences in 2005, for doctoral research on Cenozoic palynostratigraphy based on pollen grains and spores. She currently teaches Palynology in the Biological Sciences Postgraduate Program, UNAM, and conducts research on both Cenozoic Palynology and Actuopalynology (Melissopalynology and Aeropalynology). She has experience working with Paleogene and Neogene palynofloras recovered both from south-central continental Mexican paleobasins and from marine paleobasins in Baja California Sur. She is contributing to the systematic taxonomy of Cenozoic pollen grains and spores, as well as to the study of Cenozoic evolution of Mexican plant communities, with particular emphasis on semiarid vegetation from Morelos, Puebla (Tehuacán-Cuicatlán Valley), Oaxaca and Baja California Sur, Mexico.

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pramparoMercedes B. Prámparo
Centro Regional de Investigaciones Científicas y Tecnológicas
Instituto Argentino de Nivología
Glaciología y Ciencias Ambientales
Unidad de Paleopalinología
Mendoza
Argentina
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MERCEDES B. PRÁMPARO is senior researcher at the Consejo Nacional de Investigaciones Científicas y Técnicas (CCT-CONICET-Mendoza, Argentina). She has been a palynologist at the Argentinian Institute for Snow, Ice and Environmental Research (IANIGLA) since 1984. She has a degree in geology and received a PhD from the Rio Cuarto University, Cordoba, Argentina in 1989 for a thesis on the Early Cretaceous spores, pollen grains and algae of a central-western lacustrine Argentinian basin. She has mainly worked on the Mesozoic palynology of both continental and marine basins in Argentina. Her current interests include the palynostratigraphy of the lower Cretaceous, K/T boundary, Paleogene of central-western Argentina, Bolivia and Mexico, palynomorph provincialism, and the paleoenvironmental and systematic classification of pollen, spores and dinoflagellate cysts. She participated (January to April 2008) in an applied scientific research project at TNO, Utrecht, the Netherlands, on the Jurassic and late Cretaceous biostratigraphy of a northern sea basin. She was member of the Ameghiniana (the journal of the Argentinian Palaeontological Association) editorial board between 2003 and 2007.

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martinezhernandezEnrique Martínez-Hernández
Departamento de Paleontología
Instituto de Geología
Universidad Nacional Autónoma de México
Av. Universidad 3000
Ciudad Universitaria
C.P. 04510
México, Distrito Federal
This email address is being protected from spambots. You need JavaScript enabled to view it.

ENRIQUE MARTÍNEZ-HERNÁNDEZ received a B.Sc. degree in Biology from the Universidad Nacional Autónoma de México (UNAM) in 1970, majoring in Botany (Palynology). He worked on the description of recent pollen from the vegetation of Laguna Madre, Tamaulipas, Mexico. Shortly thereafter, Enrique obtained a postgraduate scholarship at Michigan State University, East Lancing, U.S.A. under Dr. Aureal T. Cross, his research was on the Upper Cretaceous palynostratigraphy of the Mesa Verde Group in Craig, Colorado, U.S.A. Upon graduating in 1975, Enrique became professor of palynology at the UNAM, in which he has worked on northeastern, northwestern and south-southwestern Mexican Mesozoic and Cenozoic paleobasin, focused on palynostratigraphy of pollen spores and dinoflagellates; on the other hand, Professor Martínez has participated in the study of recent pollen (Melissopalynology and Forensic Palynology). He has produced a collection of recent pollen with close to 12,000 samples, and has processed nearly 11,000 pre-Quaternary rock samples. Enrique has formed working palynology teams in other Mexican universities such as the Instituto de Antropología e Historia, the Universidad Metropolitana, and the Instituto Politécnico Nacional.