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)

Guillermo Fidel Turazzini, Sergio Miquel

Abstract


Numerous 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.

Keywords


Gastropoda; Stylommatophora; Pliocene; Montehermosan SALMA; South America

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DOI: http://dx.doi.org/10.5710/AMEGH.23.06.2014.2724