Where: Gallatin County County, Montana (45.7° N, 111.2° W: paleocoordinates 46.4° N, 108.0° W)

• coordinate based on political unit

• basin-level geographic resolution

When: Lower Clay Member (Madison Valley Formation), Barstovian (16.3 - 12.5 Ma)

• no details are provided about the stratigraphic and lithologic contexts

• member-level stratigraphic resolution

Environment/lithology: terrestrial

Size class: macrofossils

Primary reference: W. Auffenberg. 1958. A new genus of colubrid snake from the upper Miocene of North America. American Museum Novitates 1874:1-16 [E. Fara/E. Fara/J. Alroy]more details

PaleoDB collection 13095: authorized by Emmanuel Fara, entered by Emmanuel Fara on 21.01.2002

Creative Commons license: CC BY (attribution)