Saul, L. R. (1998). Eight Aporrhaid Gastropod Species from the Cretaceous of the Pacific Slope of North America and Clarification of the Type Species of Perissoptera. The Nautilus. 111(4): 119-142.
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Saul, L. R.
1998
Eight Aporrhaid Gastropod Species from the Cretaceous of the Pacific Slope of North America and Clarification of the Type Species of Perissoptera.