Abiquiu Reservoir (Permian of the United States)

Where: Rio Arriba County, New Mexico (36.2° N, 106.5° W: paleocoordinates 6.6° N, 32.9° W)

• coordinate stated in text

When: Arroyo del Agua Formation (Cutler Group), Wolfcampian (298.9 - 286.0 Ma)

• Original publication listed Cutler at formation rank, but this has since been elevated to group status. Berman et al. (2015) list the material from the Arroyo del Agua Fm.

Environment/lithology: wet floodplain; lithified, massive, hematitic mudstone

• "...on the basis of grain size and the lack of a channel-like geometry we assume that the environment of deposition was a floodplain."
• The Seymouria specimens described here were collected from a 5 -7 m thick, massive siltstone-mudstone unit rich in iron oxide (hematite). The matrix surrounding the specimens is a massive siltstone. No sedimentary structures are preserved in this horizon.

Size class: macrofossils

Collected in 1982; reposited in the CM

• Collected by a joint Carnegie Museum / University of Toronto team during sedimentological / stratigraphic expedition (reported by Eberth & Berman, 1983).

Primary reference: D. S. Berman, R. R. Reisz, and D. A. Eberth. 1987. Seymouria sanjuanensis (Amphibia, Batrachosauria) from the Lower Permian Cutler Formation of north-central New Mexico and the occurrence of sexual dimorphism in that genus questioned . Canadian Journal of Earth Sciences 24(9):1769-1784 [B. Gee/B. Gee]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 218165: authorized by Bryan Gee, entered by Bryan Gee on 19.02.2021

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Osteichthyes
 Seymouriamorpha - Seymouriidae
Seymouria sanjuanensis
Seymouria sanjuanensis Vaughn 1966 tetrapod
CM 28596–28599, 34900, 38022, block of six skeletons of varying completeness, all articulated