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Latiblattella avita sp. nov. (Blattaria: Ectobiidae) from the Eocene Kishenehn Formation, Montana, USA

Dale E. Greenwalt and Ľubomír Vidlička

Plain Language Abstract

Most of the cockroaches that lived in America about 50 million years ago were, and still are, found in many other parts of the world. However some groups of these insects are now limited to rather small geographical areas. One such group is the genus Latiblattella Hebard, 1917, which is currently restricted to Central America, Mexico and the southern-most portions of the United States. In this paper, we describe the first fossil of the genus Latiblattella from a specimen that was collected from oil shale sediments of a 46 million year-old lake in northwestern Montana. This new species demonstrates that the genus was more widely distributed in the very warm tropical/subtropical environments that existed around most of the world 50 million years ago.

Resumen en Español

Latiblattella avita sp. nov. (Blattaria: Ectobiidae) del Eoceno de la Formación Kishenehn, Montana, EE.UU.

Se describe la especie Latiblattella avita Greenwalt y Vidlička, 2015, sp. nov., la cual constituye el primer fósil del género. El descubrimiento de un representante fósil de este género sugiere que Latiblattella estuvo más ampliamente distribuida en el Eoceno. La fauna americana de cucarachas eocenas está compuesta principalmente de lo que hoy son géneros cosmopolitas, mientras que el género existente en la biota actual Latiblattella Hebard, 1917 está restringido a una distribución geográfica que comprende América Central, México, Florida y Arizona. El descubrimiento de Latiblattella avita, junto a la reciente descripción de Cariblattoides labandeirai Vršansky et al., 2012, también documenta la presencia de representantes más bien derivados de la familia Ectobiidae en un periodo tan temprano como el Eoceno Medio.

Palabras clave: Insecto fósil; Cucarachas cenozoicas; Pseudophyllodromiinae; nueva especie

Traducción: Enrique Peñalver

Résumé en Français

Latiblattella avita sp. nov. (Blattaria: Ectobiidae) de la Formation Eocène Kishenehn, Montana, USA

Latiblattella avita Greenwalt and Vidlička, 2015, sp. nov., et le premier fossile du genre, est décrit. La découverte d'un représentant fossile de ce genre suggère que Latiblattella était plus largement distribué durant l'Éocène. La faune américaine de cafard del'Eocène est principalement constituée de celles qui sont présentes aujourd'hui, des genres cosmopolites, alors que le genre actuel Latiblattella Hebard 1917 est limité dans sa distribution géographique à l'Amérique centrale, au Mexique, à la Floride et à l'Arizona. La découverte de Latiblattella avita, en combinaison avec la description récente de Cariblattoides labandeirai Vršansky et al., 2012, documente également la présence de représentants plutôt dérivée de la famille Ectobiidae dès l'Eocène Moyen.

Mots-clés: insectes fossiles; Cafards Cénozoïque; Pseudophyllodromiinae; nouvelles espèces

Translator: Kenny J. Travouillon

Deutsche Zusammenfassung

Latiblattella avita sp. nov. (Blattaria: Ectobiidae) aus dem Eozän der Kishenehn Formation, Montana, USA

Latiblattella avita Greenwalt and Vidlička 2015, sp. nov., das erste Fossil der Gattung, wird beschrieben. Die Entdeckung eines fossilen Vertreters der Gattung legt nahe, dass Latiblattella im Eozän weiter verbreitet war. Die eozäne amerikanische Schabenfauna ist größtenteils die gleiche wie heute, also cosmopolitische Gattungen, während die Gattung Latiblattella Hebard, 1917 in ihrer geografischen Verbreitung auf Zentralamerika, Mexiko, Florida und Arizona beschränkt ist. Die Entdeckung von Latiblattella avita, zusammen mit der neuesten Beschreibung von Cariblattoides labandeirai Vršansky et al. 2012, dokumentiert zudem das Vorkommen von eher abgeleiteten Vertretern der Familie schon im mittleren Eozän.

Schlüsselwörter: fossiles Insekt; känozoische Schaben; Pseudophyllodromiinae; neue Arten

Translator: Eva Gebauer

Arabic

511 arab

Translator: Ashraf M.T. Elewa

 

 

FIGURE 1. Latiblattella avita sp. nov. (USNM 595139). Tegmen attached (?) to an intact middle leg. Scale bar equals 5 mm.

figure1

FIGURE 2. Latiblattella avita sp. nov. (USNM 595139). 2.1. A photograph of the tegmen. 2.2. A line drawing of the forewing venation. The arrow denotes the boundary between the radial and medial fields. M, medial veins; R, radial veins; Sc, subcostal vein. Scale bar equals 3 mm.

figure2

FIGURE 3. Latiblattella avita sp. nov. (USNM 595139). 3.1. The subcostal field of tegmen showing the wide and darkly pigmented Sc vein. 3.2. The five segmented tarsus. The arrows denote tarsal segments 1 - 5 and the end of the single visible claw. Scale bars equal 1 mm.

figure3

 

 

author1Dale E. Greenwalt
Department of Paleobiology
NMNH, Smithsonian Institution
Washington, District of Columbia,
USA 20013-7012
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Dale Greenwalt received his B.A. from the University of Minnesota, an M.Sc. from Bemidji State University and his Ph.D. from Iowa State University. He was an Assistant Professor of Biochemistry at San Jose State University before moving to the biotechnology industry, working at Human Genome Sciences and Poietic Technologies, the latter at which he was Director of Research. He is currently a Research Collaborator at the Smithsonian National Museum of Natural History where he is establishing a collection of fossil insects from the Eocene Kishenehn Formation in northwestern Montana.

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author2Ľubomír Vidlička
Institute of Zoology
Slovak Academy of Sciences
Dúbravská cesta 9
845 06 Bratislava
Slovakia
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and Department of Zoology
Faculty of Natural Sciences
Comenius University
Mlynská dolina
Bratislava, 811 04
Slovakia

Ľubomir Vidlička graduated from the Faculty of Natural Sciences of Comenius University in Bratislava with a degree in systematic entomology. In 1997 he defended PhD thesis 'Revision of the Central European cockroaches of the genera Phyllodromica and Ectobius (Blattaria: Ectobiidae: Ectobiinae)' at the Institute of Experimental Phytopathology and Entomology of the Slovak Academy of Sciences in Ivanka pri Dunaji. Now is a senior researcher at the Institute of Zoology of the Slovak Academy of Sciences in Bratislava.

Current interests: taxonomy, systematic, faunistics and ethology of the cockroaches (Blattaria) and neuropterans (Neuroptera).

Up to now he described 13 new species of the recent and fossil cockroaches from Europe (Hungary, Romania, Bulgaria and Russia), Asia (Laos, Thailand) and America (USA, Mexica, Ecuador) and published 3 monographs and more then 70 papers and short notes on cockroaches and neuropteran insects.

 

TABLE 1. The Cenozoic fossils of Ectobiidae.

Subfamily*

Genus

Species

Epoch

Location

Reference

Anaplectinae

Anaplecta

sp.

Miocene

Dominican amber

Gutiérrez and Pérez-Gelabert, 2000

Blattellinae

Ischnoptera

sp.

Miocene

Chiapas amber (Mexico)

Solórzano Kraemer, 2007

Blattellinae

?Symploce

rete

Pleistocene

African copal

Gorochov, 2007

Ectobiinae

Agrabtoblatta

symmetrica

Pleistocene

African copal

Gorochov, 2007

Ectobiinae

Ectobius

arverniensis

Paleocene

Menat (France)

Piton, 1940

Ectobiinae

Ectobius

balticus

Eocene

Baltic amber

Germar and Berendt, 1856

Ectobiinae

Ectobius

menatensis

Paleocene

Menat (France)

Piton, 1940

Ectobiinae

Ectobius

glabellus

Late Oligocene

Rott (Germany)

Statz, 1939

Ectobiinae

Ectobius

kohlsi

Early Eocene

Green River (USA)

Vršanský et al., 2014

Ectobiinae

Ectobius

spp. (3)

Early Eocene

Green River (USA)

Vršanský et al., 2011

Ectobiinae

Isoplates

longipennis

Middle Eocene

Gieseltal (Germany)

Haupt, 1956

Ectobiinae

Telmablatta

impar

Middle Eocene

Gieseltal (Germany)

Haupt, 1956

Nyctoborinae

Nyctibora

elongata

Late Oligocene

Rott (Germany)

Statz, 1939

Pseudophyllodromiinae

Cariblatta

spp. (2)

Miocene

Dominican amber

Gutiérrez and Pérez-Gelabert, 2000

Pseudophyllodromiina

Cariblattoides

labandeirae

Early Eocene

Green River (USA)

Vršanský et al., 2012

Pseudophyllodromiina

Euthlastoblatta

sp.

Miocene

Dominican amber

Gutiérrez and Pérez-Gelabert, 2000

Pseudophyllodromiinae

Latiblattella

Avita sp. nov.

Middle Eocene

Kishenehn Formation (USA)

Vidlička and Greenwalt (This study)

Pseudophyllodromiinae

Plectoptera

sp.

Miocene

Dominican amber

Gutiérrez and Pérez-Gelabert, 2000

Pseudophyllodromiinae

Plectoptera

electrina

Miocene

Haitian amber

Gorochov, 2007

Pseudophyllodromiinae

Pseudosymploce

sp.

Miocene

Dominican amber

Gutiérrez and Pérez-Gelabert, 2000

Pseudophyllodromiinae

Supella

miocenica

Miocene

Chiapas amber (Mexico)

Vršanský et al., 2011

 

 

 

 

 

 

*Subfamily assignments based on Beccaloni (2014)