Perry site 6, bed 16 (Permian of the United States)

Also known as "swamp assemblage"

Where: Noble County, Oklahoma (36.3° N, 97.4° W)

• Paleocoordinates: 1.3° N, 27.4° W (Wright 2013)

• coordinate estimated from map

When: Wellington Formation (Sumner Group), Leonardian (286.0 - 274.4 Ma)

• bed-level stratigraphic resolution

Environment/lithology: mire or swamp; gypsiferous, gray, red, yellow shale and lenticular sandstone

• "swamp deposits formed close to the margin of fresh water lakes"
• "Bed 16 consists of a grey to yellow and red shale, with occasional sandstone lenses. The shales have the highly leached appearance which is characteristic of swamp deposits from this time and contain selenite crystals."

Size class: macrofossils

Preservation: mold/impression

Collected by E. C. Olson; reposited in the FMNH

Primary reference: E. C. Olson. 1970. New and little known genera and species of vertebrates from the Lower Permian of Oklahoma. Fieldiana: Geology 18(3):359-434 [J. Mueller/J. Dummasch/T. Liebrecht]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 85567: authorized by Johannes Mueller, entered by Torsten Liebrecht on 09.01.2009

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Chondrichthyes
 Xenacanthiformes - Xenacanthidae
Xenacanthus sp.
Xenacanthus sp. Beyrich 1848 elasmobranch
Osteichthyes
 Palaeoniscoidea -
Palaeoniscoidea indet.
Palaeoniscoidea indet.
"Paleoniscoids (small, genus undetermined)"
Amphibia
 Nectridea - Diplocaulidae
Diplocaulus cf. magnicornis
Diplocaulus cf. magnicornis Cope 1882 tetrapod
 Temnospondyli - Eryopidae
Eryops cf. megacephalus
Eryops cf. megacephalus Cope 1877 tetrapod
 Temnospondyli - Trimerorhachidae
Trimerorhachis cf. insignis
Trimerorhachis cf. insignis Cope 1878 tetrapod
Osteichthyes
 Synapsida - Sphenacodontidae
Dimetrodon cf. limbatus
Dimetrodon cf. limbatus Cope 1877 synapsid
 Synapsida - Ophiacodontidae
Ophiacodon uniformis
Ophiacodon uniformis Cope 1878 ophiacodont