EARLY BAJOCIAN MARINE GASTROPODS FROM THE NEUQUÉN BASIN, ARGENTINA

FERRARI, S.M. AND DAMBORENEA, S.E.

AMEGHINIANA

ASOCIACION PALEONTOLOGICA ARGENTINA

Lugar: Buenos Aires; Año: 2015 p. 625 - 646

0002-7014

Nine gastropod species are reported from early Bajocian marine deposits attwo localities in the Neuquén Basin, supplying the first detailed documentationof six gastropod families from the Middle Jurassic of Argentina at that time. Thenew gastropod species include Pleurotomariabajociana sp. nov. (Pleurotomariidae); Cryptaulaxweaveri sp. nov. and Rhabdocolpus(Infacerithium) excavatus sp. nov. (Procerithiidae);Anulifera sigmoidea sp.  nov. (Protorculidae); Globularia andina sp. nov. (Ampullinidae); Eunerinea? neuqueniana sp. nov. (Eunerineidae) and Promathildia? spinosa sp.nov. (Gordenellidae). Leptomaria? leufuensis(Weaver) and Globularia klingamanni(Weaver) are also recorded from the same localities. Rhabdocolpus (Infacerithium)and Promathildia are mentioned herefor the first time in the Argentinean Mesozoic, and Cryptaulax, Anulifera andEunerinea extend their chronostratigraphicaland palaeogeographical distribution into the Bajocian of South America.