Gray's Creek, 37 (Arroyo Formation) (Permian of the United States)

Also known as Locality 37 (Romer 1928), Craddock's ranch, faunal Zone 4, Lower Clear Fork Group, Texas red-beds, redbeds

Where: Baylor County, Texas (33.8° N, 99.1° W: paleocoordinates 2.2° N, 28.7° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

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

• "The beds average about 150 feet above the base of the Clear Fork." Details for Faunal Zone 4 of Romer 1928: "The vertebrate remains are confined to approximately the lowest 250 feet or so of the Clear Fork.."

•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

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; red claystone and conglomeratic sandstone

• "red beds... red clays, with small amounts of sandstone and conglomerates."

Size class: macrofossils

Collection methods: Romer (1928) paper is a review of vertebrates from the Texas red-beds with previously unreported (or undetailed) localities.

Primary reference: A. S. Romer. 1928. Vertebrate faunal horizons in the Texas Permo-Carboniferous red beds. University of Texas Bulletin 2801:67-108 [J. Alroy/R. Whatley/W. Clyde]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 28266: authorized by John Alroy, entered by Robin Whatley on 03.02.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

 Temnospondyli - Dissorophidae
Dissorophus sp., "Otocoelus testudineus n. gen. n. sp." = Dissorophus multicinctus
Dissorophus sp. Cope 1895 tetrapod
"Otocoelus testudineus n. gen. n. sp." = Dissorophus multicinctus Cope 1895 tetrapod
originally entered as "Otococlus testudineus"
 Cotylosauria - Conodectidae
Conodectes favosus n. gen. n. sp.
Conodectes favosus n. gen. n. sp. Cope 1896 tetrapod
 Seymouriamorpha - Seymouriidae
Seymouria sp. Broili 1904 tetrapod
 Nectridea - Diplocaulidae
Diplocaulus sp. Cope 1877 tetrapod