First railroad cutting east of Florissant (Eocene of the United States)

Where: Teller County, Colorado (38.9° N, 105.3° W: paleocoordinates 40.4° N, 97.0° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Florissant Formation, Chadronian (37.2 - 33.9 Ma)

• "Believed to belong near the top of the series. It may represent a later period than that in which most of the numerons species described by Scudder lived."

Environment/lithology: lacustrine - large; lithified, diatomaceous, tuffaceous shale

• "shales"

Size classes: macrofossils, mesofossils

Preservation: adpression

Collected by Judge J. Henderson, Dr. F. Ramaley; reposited in the UCM

Primary reference: T. D. A. Cockerell. 1906. A fossil water-bug. The Canadian Entomologist 38:209 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 152074: authorized by Matthew Clapham, entered by Matthew Clapham on 05.11.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Insecta
 Hemiptera - Corixidae
"Corixa florissantella n. sp." = Sigaretta florissantella
"Corixa florissantella n. sp." = Sigaretta florissantella Cockerell 1906 water boatman
UCM-1665F (counterpart NHM-I.8424A), "numerous individuals"
Arachnida
 Araneae - Clubionidae
Clubiona arcana
Clubiona arcana Scudder 1890 sac spider