ammonites
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Pseudopermophorus annettae Ciriacks 1963 (clam)

Bivalvia - Kalenteridae

Full reference: K.W. Ciriacks. 1963. Permian and Eotriassic bivalves of the middle Rockies. Bulletin of the American Museum of Natural History 125(1):1-100

Belongs to Pseudopermophorus according to K.W. Ciriacks 1963

Sister taxon: Pseudopermophorus uedai

Type specimen: USNM 140506, a shell (Bivalved). Its type locality is Hidden Pastures (Franson Mb), Big Sheep Canyon, Beaverhead County, which is in a Wordian shallow subtidal limestone in the Park City Formation of Montana.

Ecology: facultatively mobile infaunal suspension feeder

Average measurements (in mm): shell 61.8 x 14.6, valve length 53.6