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Celtoides unioniformis Newell 1957

Kalenteroidea - Permophoridae

Full reference: N. D. Newell. 1957. Notes on certain primitive heterodont pelecypods. American Museum Novitates 1857:1-14

Belongs to Celtoides according to K.W. Ciriacks 1963

Sister taxa: none

Type specimen: AMNH 28016. Its type locality is AMNH342, Torrey Lake, which is in a Wordian shallow subtidal limestone in the Park City Formation of Wyoming.

Average measurements (in mm): shell length 125.0, valve length 247.6