A re-examination of the Pleurodontid land snails from the Sierra Nevada de Santa Marta region, Colombia, with the description of a new species of Isomeria ALBERS (Gastropoda Pulmonata: Stylommatophora: Pleurodontidae)

摘要

The species of Labyrinthus BECKand Isomeria ALBERSknown from the Sierra Nevada de Santa Marta (SNSM) are reviewed and illustrated. Isomeria goettingi n. sp. is described as the seventh species of the family Pleurodontidae known from this region. The new taxon resembles species from the SNSM and from the Andean region of Colombia and Ecuador. The relationships between the two genera of "toothed" Pleurodontidae from northern South America are discussed, but these relationships remain unclear due to scarcity of material suitable for anatomic and molecular studies. Lectotype designations are made for Labyrinthus colombiensis DACOSTA1901 and Helix dunkeri PFEIFFER1852.