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Cosmopolitan Early Jurassic marine gastropods from west-central Patagonia, Argentina

100%

Ferrari S. M.

nr 3

449-461

A new, relatively diverse gastropod fauna is reported from the Chubut province of west−central Patagonia. The gastropod association at the “El Córdoba” fossiliferous locality (Lower Toarcian of Osta Arena Formation) consists of three new species: the eucyclid Amberleya? espinosa sp. nov. and two procerithiids Cryptaulax damboreneae sp. nov. and Cryptaulax nulloi sp. nov. Other members of the association are the ataphrid Striatoconulus sp., discohelicid Colpomphalus? sp., and an undetermined zygopleurid. Knowledge on Early Jurassic gastropods from South America and other southern continents is reviewed to show that the taxonomic composition of the El Cordoba association strongly resembles other gastropod associations of this age (even those from Europe), suggesting a wide distribution of cosmopolitan genera.

Mantoscyphidia fanthami sp.n., an ectosymbiont [Ciliophora: Peritrichia] from the gills of the marine gastropod Oxystele Philippi, 1847 in South Africa

80%

Basson L. , Botha A. , Van As J. G.

nr 1