Gastropod: Ptomatis and Retispira

Description

Fossil bellerophont gastropods *Ptomatis patulus* (A, PRI 76693) and *Retispira leda* (B, PRI 76694) from the Devonian Moscow Formation of Madison, New York. Specimen is from the collections of the [Paleontological Research Institution](http://www.priweb.org), Ithaca, New York. Longest dimension of specimen is approximately 19 cm (whole slab) / 4.0 cm (*Ptomatis*) / 3.8 cm (*Retispira*). Model by Neil Pezzoni.