Baldwin bonebed (Permian of the United States)

Also known as type horizon of Sphenacodon ferox & Ophiacodon mirus, Arroya de Agua

Where: Rio Arriba County, New Mexico (36.2° N, 106.7° W: paleocoordinates 6.6° N, 33.1° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Abo/Cutler Formation, Wolfcampian (298.9 - 286.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by D. A. Baldwin

Primary reference: R. R. Reisz. 1986. Pelycosauria. Handbuch der Paläoherpetologie / Encyclopedia of Paleoherpetology 17A:1-102 [J. Mueller/J. Dummasch/T. Liebrecht]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 80833: authorized by Johannes Mueller, entered by Jana Dummasch on 14.05.2008, edited by Torsten Liebrecht and Emma Dunne

Creative Commons license: CC BY (attribution)

Taxonomic list

Osteichthyes
 Cotylosauria - Diadectidae
Diadectes lentus Marsh 1878 tetrapod
 Synapsida - Sphenacodontidae
Sphenacodon ferox n. gen. n. sp.
Sphenacodon ferox n. gen. n. sp. Marsh 1878 synapsid
YMP 806 (type)
 Synapsida - Ophiacodontidae
Ophiacodon mirus n. gen. n. sp.
Ophiacodon mirus n. gen. n. sp. Marsh 1878 ophiacodont
YPM 807 (holotype), 808 (paratype); FMNH (WM) 157, 748; UMMP 3054, 11025; only the two YPM specimens are definetely from this locality, the other may also come from the Miller Bonebed 0.5 miles away (see coll. 80833)
Reptilia
 Eureptilia - Captorhinidae
Rhiodenticulatus heatoni Berman and Reisz 1986 eureptile
Amphibia
 Temnospondyli - Eryopidae
Eryops grandis Marsh 1878 tetrapod
 Temnospondyli - Zatracheidae
Zatrachys serratus Cope 1878 tetrapod
 Temnospondyli - Dissorophidae
Platyhystrix rugosus Case 1910 tetrapod
 Temnospondyli - Cochleosauridae
Chenoprosopus milleri Mehl 1913 tetrapod