A TERRESTRIAL GASTROPOD COMMUNITY FROM THE EARLY PLIOCENE (NEOGENE) OF MENDOZA, ARGENTINA, WITH DESCRIPTION OF A NEW SPECIES OF RADIODISCUS PILSBRY AND FERRISS, 1906 (MOLLUSCA: PULMONATA: CHAROPIDAE)
Keywords:Gastropoda, Stylommatophora, Pliocene, Montehermosan SALMA, South America
AbstractNumerous fossil gastropods have been recorded in an edaphic level of the middle section of the the Aisol Formation (Mendoza Province, Argentina). This stratigraphic section bears an association of fossil mammals suggesting an early Pliocene age (possible Montehermosan SALMA). Up to four taxa of gastropods have been identified, belonging in Succinea Draparnaud (Succineidae), Gastrocopta Wollaston (Vertiginidae), Bostryx Troschel (Bulimulidae), and a new species of Radiodiscus Pilsbry and Ferriss (Charopidae). The fossil record of terrestrial pulmonate mollusks in Argentina is scarce and mainly restricted to the Quaternary. Thus, the record of these taxa is of paramount importance because it constitutes the oldest record of Gastrocopta and Succinea in Argentina, the first record of Bostryx in Mendoza Province, and the first record of the family Charopidae (Radiodiscus sanrafaelensis nov. sp.) in Pliocene deposits of Argentina.
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