A new species of Megalobulimus from the early Holocene of southeastern Brazil (Gastropoda: Strophocheilidae)

Abstract

A new species of megasnail, <i>Megalobulimus diluvianus</i> sp. nov., is herein described based on subfossil material from limestone caves in the area of Lagoa Santa, Minas Gerais state, southeastern Brazil. The specimens come from a context of archaeological strata of early Holocene age. Considering the morphological features of the shell, the new species seems closely allied to the so-called <i>Megalobulimus bronni</i> complex”, whose representatives inhabit the tropical to subtropical Atlantic plateau of southeastern Brazil. <i>Megalobulimus diluvianus</i> sp. nov. is considered to be presently extinct (substituted by <i>M. oblongus</i> in the stratigraphical record).