Conchological differentiation and genital anatomy of Nepalese Glessulinae (Gastropoda, Stylommatophora, Subulinidae), with descriptions of six new species

Prem B Budha; Fred Naggs; Thierry Backeljau

doi:10.3897/zookeys.675.13252

Conchological differentiation and genital anatomy of Nepalese Glessulinae (Gastropoda, Stylommatophora, Subulinidae), with descriptions of six new species

Zookeys. 2017 May 23:(675):129-156. doi: 10.3897/zookeys.675.13252. eCollection 2017.

Authors

Prem B Budha^{1

2}, Fred Naggs³, Thierry Backeljau^{1

4}

Affiliations

¹ University of Antwerp, Evolutionary Ecology Group, Universiteitsplein 1, B-2610, Antwerp, Belgium.
² Central Department of Zoology, Tribhuvan University, Kirtipur, Kathmandu, Nepal.
³ Natural History Museum, Cromwell Road, London, SW7 5BD, UK.
⁴ Royal Belgian Institute of Natural Sciences, Vautierstraat 29, B-1000, Brussels, Belgium.

Abstract

Eleven species of Glessulinae belonging to the genera Glessula Martens, 1860 (three species) and Rishetia Godwin-Austen, 1920 (eight species) are reported from Nepal, six of which are new to science and are described here, viz., G. tamakoshi Budha & Backeljau, sp. n., R. kathmandica Budha & Backeljau, sp. n., R. nagarjunensis Budha & Naggs, sp. n., R. rishikeshi Budha & Naggs, sp. n., R. subulata Budha & Naggs and R. tribhuvana Budha, sp. n. and two are new records for Nepal viz. G. cf. hebetata and R. cf. mastersi. The relation between the shell height-width ratio and the structure of the proximal part of the male reproductive organs in Glessulinae is explored. Illustrations and a key for the identification of the Nepalese Glessulinae are provided, including the first record of a spermatophore in Rishetia.

Keywords: Glessula; Nepal; Rishetia; flagellum; genitalia; identification key; shell sculpture; spermatophore.