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16 December 2021 Phylogenetic Position of the Genus Ridleyconcha (Gastropoda, Stylommatophora)
Rodrigo B. Salvador
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Abstract

The Fernando de Noronha Archipelago off NE Brazil harbors a few unique terrestrial gastropod species. One of them, the monotypic genus Ridleyconcha Christensen, 2020, presents such an idiosyncratic shell morphology that, in the 130 years since its description, it has been variously allocated in unrelated families: Streptaxidae, Endodontidae, Charopidae, Camaenidae, and Scolodontidae. Herein, R. quinquelirata is included into a molecular phylogenetic framework of stylommatophoran land snails to clarify its taxonomic position. The analysis supports the latest morphological revision classifying Ridleyconcha in Scolodontidae. Considering the present sampling, Ridleyconcha appears to be the sister taxa of Entodina Ancey, 1887.

Rodrigo B. Salvador "Phylogenetic Position of the Genus Ridleyconcha (Gastropoda, Stylommatophora)," American Malacological Bulletin 38(2), 63-71, (16 December 2021). https://doi.org/10.4003/006.038.0212
Received: 8 June 2021; Accepted: 23 July 2021; Published: 16 December 2021
KEYWORDS
Brazil
Fernando de Noronha
insular fauna
land snails
Scolodontidae
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