Abstract

A new species of megasnail, Megalobulimus diluvianus 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 “Megalobulimus bronni complex”, whose representatives inhabit the tropical to subtropical Atlantic plateau of southeastern Brazil. Megalobulimus diluvianus sp. nov. is considered to be presently extinct (substituted by M. oblongus in the stratigraphical record).

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