Warfield Springs (Eocene of the United States)

Also known as Locality K

Where: Lincoln County, Wyoming (41.7° N, 110.7° W: paleocoordinates 46.8° N, 94.4° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Fossil Butte Member (Green River Formation), Wasatchian (55.8 - 50.3 Ma)

• "Eocene" and from the "F-2 deposits": age assignment is based on other Fossil Butte collections

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine deltaic; lithified limestone

• "Fossil Lake was thought to have been a subtropical freshwater lake... [the] locality is located in the southeastern near-shore part of what was Fossil Lake" and is "thought to have been part of a large delta system"
• lizard is on a "limestone slab"

Size class: macrofossils

Preservation: adpression

Reposited in the FMNH

Primary reference: J. L. Conrad, O. Rieppel, and L. Grande. 2007. A Green River (Eocene) polychrotid (Squamata, Reptilia) and a re-examination of iguanian systematics. Journal of Paleontology 81(6):1365-1373 [J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 85026: authorized by John Alroy, entered by John Alroy on 22.11.2008, edited by Graeme Lloyd

Creative Commons license: CC BY (attribution)

Taxonomic list

• list of fishes is incomplete and omits species names
Actinopteri
 Clupeiformes - Clupeoidei
Knightia sp. Jordan 1907 hering
 Ellimmichthyiformes - Ellimmichthyidae
Diplomystus sp. Cope 1877
Aves
 Lithornithiformes - Lithornithidae
Calciavis grandei n. gen. n. sp.1
Calciavis grandei n. gen. n. sp.1 Nesbitt and Clarke 2016 bird
AMNH 30578, AMNH 30560
Reptilia
 Squamata -
Saniwa ensidens2 Leidy 1870 squamates
FMNH PR2380, cast of a complete skeleton (original in a private collection, Black Hills Institute)
 Squamata - Polychrotidae
Afairiguana avius n. gen. n. sp.
Afairiguana avius n. gen. n. sp. Conrad et al. 2007 squamates