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A new land snail from the Quaternary of Mallorca (Balearic Islands, Western Mediterranean): Darderia bellverica n. gen., n. sp. (Gastropoda Pulmonata, Helicodontidae)

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Author(s): C. R. Altaba

Journal: Animal Biodiversity and Conservation
ISSN 1578-665X

Volume: 29;
Issue: 2;
Start page: 195;
Date: 2006;
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Keywords: Taxonomy | Land snail | Quaternary | Fossil | Helicodontidae | Balearic Islands

ABSTRACT
A new land snail from the Quaternary of Mallorca (Balearic Islands, Western Mediterranean): Darderia bellverica n. gen., n. sp. (Gastropoda Pulmonata, Helicodontidae A new genus and species of land snail is described from pre-human paleosoils at Bellver hill in the island of Mallorca. It is a medium-sized helicodontid with 6 tight coils, dome-shaped spire, obtuse peripheral keel, eccentric umbilicus, narrow aperture inclined forward, sinuous reflected peristome, a low angular tooth, 5 infrapalatal denticles, teleoconch with many regular riblets and widely scattered hair pits, and protoconch with simple wrinkles and very thin spiral lines. This very rare species had been reported as a member of the Iberian-Maghribian Oestophora. Similar Plio-Pleistocene fossils from the Balearics and Sardinia are placed in the new genus. This may constitute a biogeographic link within the Lindholmiolinae, now surviving at both ends of the Mediterranean basin. It remains unknown when, why or whether it became extinct.

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