A new freshwater snail genus and species (Gastropoda: Caenogastropoda, Cochliopidae) with extremely spinous shells from sub-recent spring deposits in northeastern Mexico-Reference-Cited by-同舟云学术

A new freshwater snail genus and species (Gastropoda: Caenogastropoda, Cochliopidae) with extremely spinous shells from sub-recent spring deposits in northeastern Mexico

Published:2022-08-02 Issue:5 Volume:5169 Page:472-480
ISSN:1175-5334
Container-title:Zootaxa
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Short-container-title:Zootaxa

Author:

CZAJA ALEXANDER^ORCID,COVICH ALAN P.^ORCID,NEUBAUER THOMAS A.^ORCID,ESTRADA-RODRÍGUEZ JOSÉ LUIS^ORCID,ÁVILA-RODRÍGUEZ VERÓNICA^ORCID,MATA JORGE SÁENZ^ORCID

Abstract

A new monotypic genus of freshwater snail from late Holocene spring deposits in Viesca, Coahuila (Mexico), is described based on shell morphology. Spinopyrgus luismaedai n. gen. et n. sp. has two to three carinate shells with long and wide shovel-shaped spines, strong axial ridges and a pointed protoconch. All sculptural ornamentations on the teleoconch are part of the calcareous shell material and not projections of the periostracum. This combination of shell features and their almost “marine-like” appearance is unknown among North American recent and fossil freshwater snails. Because of its shell characteristics, we placed the new genus tentatively in the Cochliopidae. The springs of Viesca dried up in the second half of the 20th century so that any living occurrence of this species in neighboring areas is unlikely, rendering the new genus and species possibly extinct.

Publisher

Magnolia Press

Subject

Animal Science and Zoology,Ecology, Evolution, Behavior and Systematics

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