Where: Sioux County, Nebraska (42.9° N, 103.6° W: paleocoordinates 44.1° N, 95.5° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Brule Formation, Orellan (33.9 - 33.3 Ma)

• "late Orellan"

Environment/lithology: terrestrial; lithology not reported

Size class: mesofossils

Collected in the 1970s

• University of Kansas Museum of Natural History collection

Primary reference: J. A. Holman. 1983. A new species of Helagras (Serpentes) from the Middle Oligocene of Nebraska. Journal of Herpetology 17:417-419 [J. Head/J. Head]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 75879: authorized by John Alroy, entered by John Alroy on 04.11.2007, edited by Jason Head

Creative Commons license: CC BY (attribution)