Forked Gulch, Old Mountains, locality 40189 (Eocene of the United States)

Where: Colorado (39.5° N, 108.1° W: paleocoordinates 43.3° N, 94.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Green River Formation, Bridgerian (50.3 - 46.2 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine - large; lithified lime mudstone

• Laramide-style block faulting

Size class: macrofossils

Preservation: adpression

Collected by D. Kohls in 1991-1993; reposited in the USNM

Primary reference: G. M. Dlussky and A. P. Rasnitsyn. 2002. Ants (Hymenoptera: Formicidae) of Formation Green River and some other middle Eocene deposits of North America. Russian Entomological Journal 11:411-436 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 138671: authorized by Matthew Clapham, entered by Matthew Clapham on 25.01.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Insecta
 Hemiptera - Tingidae
Gyaclavator kohlsi3 Wappler et al. 2015 lace bug
USNM 582493
 Orthoptera - Eumastacidae
Eoerianthus eocaenicus n. gen. n. sp.1
Eoerianthus eocaenicus n. gen. n. sp.1 Gorochov 2012 monkey grasshopper
USNM Kohls 86916/86927, 86918, 85340-AB, 86909, 86922
 Orthoptera - Tetrigidae
Eotetrix unicornis n. gen. n. sp.1
Eotetrix unicornis n. gen. n. sp.1 Gorochov 2012 pygmy grasshopper
USNM Kohls 86908/80698
 Orthoptera - Gryllidae
Eotrella mira n. gen. n. sp.1 Gorochov 2012 spider cricket
USNM Kohls 85450/85344
Trigonidiinae indet.1 Saussure 1874 true crickets
USNM Kohls 86898
Gryllinae indet.1 Laicharting 1781 field cricket
USNM Kohls 86895, 86896, 86905, 86907, 86920, 86925
Pronemobius sp.1 Scudder 1890 field cricket
USNM Kohls 105006
Pronemobius ? tertiarius1 Scudder 1878 field cricket
USNM Kohls 86906-AB
? Eogryllus elongatus1 Gorochov 2012 field cricket
USNM Kohls 86890, 86891
 Orthoptera - Mogoplistidae
Pteromogoplistes ? smithii1 Scudder 1890 scaly cricket
USNM Kohls 86921
 Hymenoptera - Formicidae
Kohlsimyrma longiceps n. sp. Dlussky and Rasnitsyn 2002 ant
USNM 495878, 877
Dolichoderus kohlsi Dlussky and Rasnitsyn 2002 ant
USNM 495876
Eoformica pinguis Scudder 1877 ant
USNM 495874, 875
 Hymenoptera - Ichneumonidae
? Scambus mandibularis n. sp.2 Spasojevic et al. 2018 ichneumon wasp
USNM 501474