Mitchell Creek, 29 (Waggoner Ranch Formation) (Permian to of the United States)

Also known as Locality 29 (Romer 1928), old Bar X pasture, Timber Creek, faunal Zone 3, Upper Wichita Group, Texas red-beds, redbeds, Lucas Ranch

Where: Baylor County, Texas (33.7° N, 99.1° W: paleocoordinates 1.4° N, 29.0° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Waggoner Ranch Formation (Wichita Group), Artinskian to Artinskian (290.1 - 272.3 Ma)

• "It is about 150 feet above the Beaverburk." Details for Faunal Zone 3 of Romer 1928: "approximately 230 feet in thickness...The total thickness of the Wichita group, as thus defined is, in this region, approximately 780 feet." Clyde Formation is approx. equivalent to Waggoner Ranch Formation (Hetz and Brown 1987).

•the Waggoner Ranch Formation is equivalent to the Bead Mountain through Lueders formations (Tabor et al. 2002), which are late Artinskian and early Kungurian according to Wardlaw 2005, Permophiles (JA)

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; limestone and red, blue shale

• "limestones, often impure, with blue and red shales."

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 28250: authorized by John Alroy, entered by Robin Whatley on 03.02.2003, edited by Torsten Liebrecht

Creative Commons license: CC BY (attribution)

Taxonomic list

 Temnospondyli - Eryopidae
Eryops sp. Cope 1877 tetrapod
 Temnospondyli - Dissorophidae
Broiliellus sp. Williston 1914 tetrapod
 Temnospondyli - Trimerorhachidae
Trimerorhachis sp. Cope 1878 tetrapod
entered as "Trimerorachis"
 Eureptilia - Captorhinidae
Captorhinus sp., Captorhinus aguti1, "Pariotichus laticeps n. sp." = Captorhinus laticeps2, "Eocaptorhinus laticeps" = Captorhinus laticeps2, Reiszorhinus olsoni n. gen. n. sp.4
Captorhinus sp. Cope 1896 eureptile
Captorhinus aguti1 Cope 1882 eureptile
FMNH UC 185, 687, P 12757; these specimens are deducted from the originally 11 "Captorhinus sp." occurences of Romer (1928)
"Pariotichus laticeps n. sp." = Captorhinus laticeps2 Williston 1909 eureptile
FMNH UC 642 (type); this specimen is deducted from the originally 11 "Captorhinus sp." occurences of Romer (1928)
"Eocaptorhinus laticeps" = Captorhinus laticeps2 Williston 1909 eureptile
FMNH UC 196*, 228, 701, 1043*, 1045, 1698 (= C 262)*; asterisks designate specimens assigned to Captorhinus aguti by Fox & Bowman (1966); all specimens are deducted from the originaly 11 "Captorhinus sp." occurences of Romer (1928)
Reiszorhinus olsoni n. gen. n. sp.4 Sumida et al. 2010 eureptile
 Araeoscelidia - Araeoscelidae
Araeoscelis casei5 Broom 1913 diapsid
MCZ 1259 to 1262, 1708
 Synapsida - Ophiacodontidae
"Theropleura sp." = Ophiacodon, Varanosaurus wichitaensis3
"Theropleura sp." = Ophiacodon Marsh 1878 ophiacodont
Varanosaurus wichitaensis3 Romer 1937 ophiacodont
 Synapsida - Varanopidae
Mycterosaurus longiceps n. gen. n. sp.3
Mycterosaurus longiceps n. gen. n. sp.3 Williston 1915 synapsid
FMNH UC 169, 692 (type)
 Synapsida - Sphenacodontidae
Dimetrodon sp. Cope 1878 synapsid
 Stegocephali -
Pantylus cordatus Cope 1881 lobe-finned fish
UC 1069 (vertebrae, ribs, pectoral, and pelvic girdles, and limb elements of several individuals (Carroll, 1968)