5 km west of Richland Springs (Carboniferous of the United States)

Where: San Saba County, Texas (31.3° N, 99.0° W: paleocoordinates 9.2° S, 36.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Strawn Group, Moscovian (315.2 - 307.0 Ma)

• The locality is the same, or very close to, the Big Uncle Creek Stop in the field trip guidebook of Grayson and Merrill (1991), which is described as being 2.80 km west and slightly north-west of the centre of Richland Springs. This field trip stop is in the upper Strawn Group. The age, as indicated by conodonts Idiognathodus delicatus, Neognathodus medadultimus, Neognathodus medexultimus and Gondolella bella, is early to middle Desmoinesian (Grayson et al. 1985; Barrick et al. 2004).

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified sandstone

• Embedded in a sandstone and conglomerate matrix.

Size class: macrofossils

Reposited in the TMM

• These specimens were found long ago, probably as long ago as the 1893 surveys of E. Cope and W.F. Cummins.

Primary reference: W. M. Itano, K. J. Houck, and M. G. Lockley. 2012. Systematics and occurrences of Edestus (Chondrichthyes) worldwide and new occurrences from Colorado and Texas. Historical Biology 24:397-410 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 132077: authorized by Matthew Clapham, entered by Matthew Clapham on 07.08.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

 Petalodontiformes - Petalodontidae
Petalodus sp. chimaera
In TMM 40111-7
 Eugeneodontiformes - Edestidae
Edestus minor Newberry 1866 chimaera
Nineteen incomplete teeth, TMM 40111-7, 40234-8, 40234-9, 40234-10, 40234-11, 40234-12 and 13 teeth sharing number TMM 40234-1