5 miles SE of mouth of Pat O'Harra Creek (Eocene of the United States)

Also known as Clark's Fork Basin, Pat O'Hara Creek mouth

Where: Park County, Wyoming (44.9° N, 109.2° W: paleocoordinates 49.7° N, 91.9° W)

• coordinate based on nearby landmark

When: Willwood Formation, Wasatchian (55.8 - 50.3 Ma)

• "above red-banded beds"

•Previously Wasatch Fm, subsequently renamed as Willwood Formation in the early 1940s

Environment/lithology: terrestrial; lithology not reported

Size class: mesofossils

Collected by William Stein in 1912

Primary reference: C. W. Gilmore. 1928. Fossil lizards of North America. Memoirs of the National Academy of Sciences 22(3):1-201 [J. Head/J. Head/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 180118: authorized by Paul Barrett, entered by Terri Cleary on 08.07.2016

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Squamata - Anguidae
Melanosaurus maximus n. gen. n. sp.
Melanosaurus maximus n. gen. n. sp. Gilmore 1928 squamates
AMNH 5168 (holotype), greater portion of a crushed skull and lower jaws, parts of 2 vertebrae, numerous dermal scutes, many fragments