title: Early Bajocian Marine Gastropods from the Neuquén Basin, Argentina
abstract: Nine gastropod species are reported from early Bajocian marine deposits at two localities in the Neuquén Basin, supplying the first detailed documentation of six gastropod families from the Middle Jurassic of Argentina at that time. The new gastropod species include Pleurotomaria bajociana sp. nov. (Pleurotomariidae); Cryptaulax weaveri sp. nov. and Rhabdocolpus(Infacerithium) excavatus sp. nov. (Procerithiidae); Anulifera sigmoidea sp. nov. (Protorculidae); Globularia andina sp. nov. (Ampullini
journal: Ameghiniana