Where: Big Horn County, Wyoming (44.5° N, 107.9° W: paleocoordinates 44.2° N, 58.0° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Little Sheep Mudstone Member (Cloverly Formation), Aptian to Aptian (125.0 - 109.0 Ma)

• 30 feet below unit VI; member = Ostrom's unit V

•

•D'Emic et al. 2019: The overlying Little Sheep Mudstone Member was deposited ca. 124–109 Ma in a time of low sediment supply.

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; claystone

Size class: macrofossils

Collected by J. Ostrom in 1962; reposited in the YPM

Collection methods: quarrying, mechanical,

Primary reference: J. H. Ostrom. 1970. Stratigraphy and paleontology of the Cloverly Formation (Lower Cretaceous) of the Bighorn Basin area, Wyoming and Montana. Peabody Museum Bulletin 35:1-234 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 50352: authorized by Matthew Carrano, entered by Matthew Carrano on 13.05.2005

Creative Commons license: CC BY (attribution)