Parabuccinum, a new genus of Magellanic buccinulid (Gastropoda: Neogastropoda), with a description of a new species

摘要

A new genus, Parabuccinum, is established for four bathyal Magellanic species, of which one, Parabuccinum rauscherti, is described as new. The remaining three species were originally described in the Antarctic genus Chlanidota, from which they differ in the morphology of their protoconch, operculum, radula, stomach, and male reproductive system. Parabuccinum appears to be most closely related to the monotypic circumAntarctic genus Neobuccinum, but may be distinguished on the basis of shell and penis morphology, as well as by the size and shape of the gland of Leiblein. Parabuccinum is endemic to the Magellanic Province, and is the first record of the subfamily Bucinulinae in the malacofauna of this region.