Where: Colorado (39.5° N, 108.0° W: paleocoordinates 43.3° N, 94.5° 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
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 138664: authorized by Matthew Clapham, entered by Matthew Clapham on 24.01.2013
Creative Commons license: CC BY (attribution)
Taxonomic list
Insecta | |
Gryllinae indet.1, Eogryllus unicolor n. sp.1, ? Eogryllus elongatus n. sp.1, Pronemobius sp.1, Pronemobius ? tertiarius1, ? Eneopterinae indet.1
Pronemobius ? tertiarius1 Scudder 1878 field cricket USNM Kohls 77193/IKAO744, IKAO739-499, IKAO750-525
? Eneopterinae indet.1 Saussure 1874 bush cricket USNM Kohls IKAO745/447, IKAO743/77906, 75763, unnumbered
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Eoerianthus eocaenicus1 Gorochov 2012 monkey grasshopper USNM Kohls 77131, 75277/8, 75264, 77143, 75304/5, 75323, 75283
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Carinibus molestus n. gen. n. sp.2
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Formicidae "indet. C", Kohlsimyrma gracilis n. sp., Myrmecites rotundiceps n. gen. n. sp., Solenopsites minutus n. gen. n. sp., Eoformica globularis n. sp., Eoformica pinguis, Eoformica magna n. sp., Mianeuretus sp., Mianeuretus eocenicus n. sp., Ponerites eocenicus n. gen. n. sp., Dolichoderus kohlsi n. sp., Proiridomyrmex vetulus n. gen. n. sp., Archimyrmex rostratus
Eoformica pinguis Scudder 1877 ant USNM 495897, 899, 900, 903, 910, 913, 915, 918, 920, 924, 929, 931, 934, 938, 960
Dolichoderus kohlsi n. sp. Dlussky and Rasnitsyn 2002 ant USNM 495905, 901, 898, 904, 908, 921, 922, 925, 927, 930, 932, 935, 936, 941, 942, 944, 912, 928
Archimyrmex rostratus Cockerell 1923 bulldog ant USNM 495902; 495894, 985, 986, 909, 496001-005 in Dlussky & Pervilieva, 2003
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