East Alkali Gulch head, south of De Beque (Eocene of the United States)

Where: Colorado (39.2° N, 108.2° W: paleocoordinates 43.0° N, 94.8° 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 shale

Size classes: macrofossils, mesofossils

Preservation: adpression

Collected by John P. Byram in 1922

Primary reference: T. D. A. Cockerell. 1925. Fossil insects in the United States National Museum. Proceedings of the United States National Museum 64(13):1-15 [C. Labandeira/C. Labandeira/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 122746: authorized by Matthew Clapham, entered by Matthew Clapham on 05.01.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Insecta
 Diptera - Mycetophilidae
Acnemia cyclosoma n. sp.
Acnemia cyclosoma n. sp. Cockerell 1925 fungus gnat
USNM 69176
 Diptera - Bibionidae
Plecia rhodopterina n. sp.
Plecia rhodopterina n. sp. Cockerell 1925 love bug
USNM 69177
 Diptera - Eophlebomyiidae
Eophlebomyia claripennis n. gen. n. sp.
Eophlebomyia claripennis n. gen. n. sp. Cockerell 1925 fly
USNM 69175
 Hymenoptera - Cimbicidae
"Amasis byrami n. sp." = Eopachylosticta byrami
"Amasis byrami n. sp." = Eopachylosticta byrami Cockerell 1925 cimbicid sawfly
USNM 69181
 Coleoptera - Elateridae
Cardiophorus exhumatus n. sp.
Cardiophorus exhumatus n. sp. Cockerell 1925 click beetle
USNM 69614
Arachnida
 Araneae - Linyphiidae
Linyphia byrami n. sp.
Linyphia byrami n. sp. Cockerell 1925 money spider/sheet weaver
USNM 69184