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, 1998 Page 119 Eight Aporrhaid Gastropod Species from the Cretaceous of the Pacific Slope of North America and Clarification of the Type Species of Perissoptera L. R. Saul Natural Histon Museum of Los Angeles Couiih' 900 Exposition Bo\ile\ard Los Angeles, CA 90007 USA [email protected]()ni ABSTRACT Eight aporrhaiil species iroin Pacific Slope deposits ot late Ear- K' Cretaceous through earlv Late Cretaceous age are assigned among three genera, Aporrltais. Lntialn, and Alaiiiiu'lla n. gen. Except for two species of Lntialn, Lntinln sp. ot Albian age from Oregon and Lntinln hcliaca n. sp. of Cenomanian age from Fresno and Shasta counties, Calitoniia, the species are of Turonian age. Pacific Slope Lntiala was most species-diverse during the Turonian and has not been found in >oimger Pacific Slope deposits. The three Turonian Latinia are Lntinln cnlifor- nica (Gabh) from Sisldvou and Sliasta comities, Cahtonna, Ln- tinln sigiiM n. sp. from the Redding area, Shasta (>ount^

Viewer