Olson Locality Bac (Vale Formation) (Permian of the United States)

Also known as Beaver Creek, Bac locality

Where: Baylor County, Texas (33.6° N, 99.3° W: paleocoordinates 2.2° N, 28.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Vale Formation (Clear Fork Group), Kungurian (279.3 - 272.3 Ma)

• Lower part of the Vale Formation, about 100 feet above base. Lower Permian (Leonardian).

•the base and top of the Clear Fork Group (i.e., Arroyo, Vale, and Choza formations) are both within the Kungurian: see Wardlaw 2005 (Permophiles) for the base, and DiMichele et al. 2001 (J Paleont) for the top

• bed-level stratigraphic resolution

Environment/lithology: terrestrial

Size class: macrofossils

Reposited in the FMNH

• Original citation for type species Trematopsis seltini sp. nov. is Chicago Natural History Museum (CNHM).

Primary reference: E. C. Olson. 1956. Fauna of the Vale and Choza: 12. A new trematopsid amphibian from the Vale Formation. Fieldiana: Geology 10(26):323-328 [J. Alroy/R. Whatley/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 36571: authorized by John Alroy, entered by Robin Whatley on 04.02.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Milner 1985 reassigns the subjective synonym Trematopsis seltini to Cacops cf. aspidephorus. Cacops is a dissorophoid.

•[Trematopidae: Trematopsis seltini n. gen. et sp. Olson 1956]

Amphibia
 Temnospondyli - Dissorophidae
Cacops cf. aspidephorus Williston 1910 tetrapod