title: A review of the microgastropod genus Systenostoma Bavay & Dautzenberg, 1908 and a new subterranean species from China (Gastropoda, Pulmonata, Hypselostomatidae).
abstract: A review of the microgastropod genus Systenostoma is provided. Thai and Malaysian species are transferred to a new genus, Angustopila (type species: Systenostoma tamlod Panha & Burch, 1999). A new subterranean Angustopila species is described here. Conchologically, the new species is most similar to the cave-dwelling, Thai A. tamlod (Panha & Burch, 1999). One Thai species (Systenostoma edentata) is transferred to the genus Hypselostoma. Vietnamese members remain in the genus Tonkinospira (nomen novum) for Systenostoma Bavay & Dautzenberg, 1908 (non Systenostoma Marsson, 1887). A comprehensive map of former Systenostoma species is presented. SEM and NanoCT images, including a video of A. huoyani sp. n. internal shell morphology, provide novel perspectives of the shells of Angustopila and of the scarcely known Vietnamese Tonkinospira species. The biology of these snails is not yet known but collection localities suggest a troglophilic ecology.
authors.affiliation: Department of Community Ecology, Institute of Ecology and Evolution, Baltzerstrasse 6, University of Bern, CH-3012 Bern, Switzerland.
authors.forename: Adrienne
authors.initials: A
authors.lastname: Jochum
authors.affiliation: Drnovškova pot 2, Mekinje, 1240 Kamnik, Slovenia.
authors.forename: Rajko
authors.initials: R
authors.lastname: Slapnik
authors.affiliation: Universitätsklinikum Gießen und Marburg GmbH-Standort Gießen, Zentrum für Radiology, Abteilung für Radiologie, Klinik-Str. 33, 35385 Gießen, Germany.
authors.forename: Marian
authors.initials: M
authors.lastname: Kampschulte
authors.affiliation: Universitätsklinikum Gießen und Marburg GmbH-Standort Gießen, Zentrum für Radiology, Abteilung für Radiologie, Klinik-Str. 33, 35385 Gießen, Germany.
authors.forename: Gunhild
authors.initials: G
authors.lastname: Martels
authors.affiliation: RJL Micro & Analytic GmbH, Im Entenfang 11, 76689 Karlsdorf-Neuthard, Germany.
authors.forename: Markus
authors.initials: M
authors.lastname: Heneka
authors.affiliation: Department of Biology, Shinshu University, Matsumoto 390-8621, Japan.
authors.forename: Barna
authors.initials: B
authors.lastname: Páll-Gergely
keywords: Pupillidae; Taxonomy; Vertiginidae; cave-dwelling species; conservation; subterranean snail