Lake Frederick site OMNH V247; table 1 (Permian of the United States)

Where: Tillman County, Oklahoma (34.5° N, 98.9° W: paleocoordinates 2.8° N, 28.1° W)

• coordinate based on nearby landmark

When: Garber Sandstone Formation (Sumner Group), Permian (298.9 - 251.9 Ma)

• upper part of Garber Sandstone Formation; early Permian

Environment/lithology: terrestrial; sandstone and claystone

• deposited in fluvial and lacustrine environments in a coastal plain
• 49-64 m of reddish-brown, coarse-grained sandstone, reddish-brown to grayish mudstone conglomerates, and gray claystone

Size classes: macrofossils, mesofossils

• all Frederick Lake site specimens, undivided by layer - also see individual collections

Primary reference: J. Zidek, G.D. Johnson, W. May and A. Claborn. 2003. New Specimens of Xenacanth and Hybodont Sharks (Elasmobranchii: Xenacanthida and Hybodontoidea) from the Lower Permian of Southwestern Oklahoma. Oklahoma Geology Notes 63(4):136-147 [B. Seuss/B. Seuss/B. Seuss]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 221392: authorized by Barbara Seuss, entered by Barbara Seuss on 02.08.2021

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Palaeoniscidea indet.
Osteichthyes
 Recumbirostra - Gymnarthridae
Cardiocephalus sternbergi
Cardiocephalus sternbergi Broili 1904 amniote
occurrences are near the Lake Frederick site
 Synapsida - Sphenacodontidae
Dimetrodon limbatus
Dimetrodon limbatus Cope 1877 synapsid
occurrences are near the Lake Frederick site
Reptilia
 Eureptilia - Captorhinidae
Captorhinus aguti
Captorhinus aguti Cope 1882 eureptile
Amphibia
 Nectridea - Diplocaulidae
Diplocaulus sp.
Diplocaulus sp. Cope 1877 tetrapod
 Temnospondyli - Eryopidae
Eryops megacephalus
Eryops megacephalus Cope 1877 tetrapod
occurrences are near the Lake Frederick site
 Temnospondyli - Trimerorhachidae
Trimerorhachis insignis
Trimerorhachis insignis Cope 1878 tetrapod
 Temnospondyli - Trematopidae
Acheloma sp.
Acheloma sp. Cope 1882 tetrapod
occurrences are near the Lake Frederick site
Osteichthyes
 Palaeonisciformes - Platysomidae
Platysomus palmaris
 Elonichthyiformes - Acrolepididae
Acrolepis sp.
Acrolepis sp. Agassiz 1833 ray-finned fish
Chondrichthyes
 Hybodontiformes -
Hybodontoidea indet.
Hybodontoidea indet. Agassiz 1834 elasmobranch
new gen., new sp.
 Hybodontiformes - Polyacrodontidae
Polyacrodus zideki
Polyacrodus zideki Johnson 1981 elasmobranch
P. (=Lissodus?) zideki
 Hybodontiformes - Acrodontidae
? Acrodus sweetlacruzensis, ? Acrodus cf. olsoni
? Acrodus sweetlacruzensis Johnson 1981 elasmobranch
? Acrodus cf. olsoni Johnson 1981 elasmobranch
 Xenacanthida - Orthacanthidae
Orthacanthus sp., Orthacanthus texensis, Orthacanthus platypternus
Orthacanthus sp. Agassiz 1843 elasmobranch
Orthacanthus texensis Cope 1888 elasmobranch
Orthacanthus platypternus Cope 1884 elasmobranch
 Acanthodiformes - Acanthodidae
Acanthodes sp.
Acanthodes sp. Agassiz 1833 spiny fish