Where: Arizona (31.7° N, 110.0° W: paleocoordinates 5.4° N, 37.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Colina Limestone Formation (Naco Group), Kungurian (279.3 - 272.3 Ma)

• Naco Group (possibly Colina Limestone). PJW: Was entered as Cochise, but that's the locality; there is a Cambrian formation by that name, but no Permian ones that I can find.

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified limestone

Size class: macrofossils

Primary reference: E. L. Yochelson. 1956. Permian Gastropoda of the southwestern United States. 1. Euomphalacea, Trochonematacea, Pesudophoracea, Anomphalacea, Craspedostomatacea, and Platyceratacea. Bulletin of the American Museum of Natural History 110(3):173-276 [D. Bottjer/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 121355: authorized by Matthew Clapham, entered by Matthew Clapham on 02.12.2011

Creative Commons license: CC BY (attribution)