Plagiostoma
(a subgenus of Lima)
Species
Plagiostoma occidentalis Hall and Whitfield, 1877
Occurrence: Carmel; Watton Canyon Member of Twin Creek Limestone
Also called Lima (Plagiostoma) occidentalis
Reference: Imlay, 1964; Imlay, 1967
Plagiostoma occidentalis
Photograph from Imlay, 1964
Plagiostoma ziona Imlay, 1964
Distinguished from P. occidentalis by having only half as many ribs, which are broader, flat-topped, and tend to split
Occurrence: Carmel
Reference: Imlay, 1964
Plagiostoma ziona
Photograph from Imlay, 1964
