Protocythere
Species
Protocythere pyriforma Peterson, 1954
Occurrence: lower Sundance (rare to common)
Reference: Peterson, 1954
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Protocythere pyriforma
Photograph from Peterson, 1954
Protocythere quadricarinata Swain and Peterson, 1952
Occurrence: Redwater, Swift, lower Sundance
Reference: Swain and Peterson, 1952; Peterson, 1954
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Protocythere quadricarinata
Photograph from Swain and Peterson, 1952