Twin Butte Creek (Cretaceous to of the United States)

Also known as Pteranodon umbrosus holotype

Where: Logan County, Kansas (38.8° N, 100.9° W: paleocoordinates 43.9° N, 68.7° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Smoky Hill Chalk Member (Niobrara Formation), Late/Upper Coniacian to Late/Upper Coniacian (89.3 - 70.6 Ma)

• Specimens probably collected between Marker Units 8 and 20 (Bennett 1994)

• bed-level stratigraphic resolution

Environment/lithology: offshore; chalk

Size class: macrofossils

Collected by Cope in 1871; reposited in the AMNH

Primary reference: E. D. Cope. 1872. On two new ornithosaurians from Kansas. Proceedings of the American Philosophical Society 12:420-422 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 93219: authorized by Richard Butler, entered by Richard Butler on 08.01.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

 Pterosauria -
Ornithocheirus umbrosus n. sp. Cope 1872 pterosaur
AMNH 1571, distal end of the left metacarpal IV nd proxima end of right wing phalanx 1, from different individuals