Clarification of the taxonomic status of Isomeria morula (Hidalgo 1870), from ecuador (Gastropoda: Pleurodontidae)

摘要

A clarification of the status of Isomeria morula (Hidalgo 1870) is given, based on the recently rediscovered, likely type specimen at Museo Nacional de Ciencias Naturales (MNCN, Madrid, Spain), and additional material from University of Michigan Museum of Zoology (UMMZ, Ann Arbor USA). The available material (three specimens) comes from older collections (i.e., mid- to late 1800's)from Ecuador. The specimen at MNCN is here designated as the lectotype of I. morula (Hidalgo 1870). Conchological characteristics are discussed and this species is fully illustrated for the first time. Comparisons of this taxon with other Isomeria from western South America and a partial key are also given, thus contributing to clarifying its status and recognizing it from other species in the genus. The geographic distribution of I. morula and its conservation status remain unknown.