Review of the current knowledge of the systematics of Onchidiidae (Mollusca: Gastropoda: Pulmonata) with a checklist of nominal species

Abstract

Because Onchidiidae (Mollusca: Gastropoda: Pulmonata) has been understudied since the last experts were active more than 70 years ago, systematics of this taxon is in a state of confusion: The nomenclatural status of most species names is unknown; the current supra-specific classification, largely based on Labbé’s work, has not been revised since the 1930s and needs to be re-evaluated through a modern, phylogenetic approach. A checklist of all 143 species names available in Onchidiidae is provided, as a first step towards a systematic revision. In addition, type material information (all existing types were examined by the author), type locality, and comments on the current taxonomic status and classification are provided for each species name. Present state of knowledge of the higher-level systematics of Onchidiidae is also briefly reviewed. Species diversity based on traditional generic taxa is presented. Finally, type localities are listed by region, worldwide, and interesting questions of biogeography are mentioned.