A molecular and conchological dissection of the “scaly” Georissa of Malaysian Borneo (Gastropoda, Neritimorpha, Hydrocenidae)

By

Khalik, Mohd Zacaery
Hendriks, Kasper
Vermeulen, J. J., 1955-
Schilthuizen, Menno, 1965-

Type

Article

Date of Publication

2018

Original Publication

ZooKeys

Volume

773

Pages

Jan-55

Subjects

gastropods , land snail , limestone karst , Malaysian Borneo , Micro-computed tomography , Sabah , Sarawak , species delimitation

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/zookeys.773.24878

 

Abstract

The Bornean hydrocenids have so far been understudied compared to other non-pulmonate snails in this region. In the present study, we review a first group of minute land snail species belonging to the genusGeorissa(Gastropoda, Hydrocenidae) from Malaysian Borneo. This group is restricted to the species with conspicuous scale-like sculpture on the shell. Based on materials from recent fieldwork, museums, and personal collections, Malaysian Borneo hydrocenids are more complex and diverse in shell characters than previously anticipated. Here, a molecular, conchological, and biogeographic study of this “scaly group” is presented. We recognise 13 species of which six are new to science, namelyGeorissaanyiensissp. n.,Georissamuluensissp. n.,Georissabauensissp. n.,Georissasilaburensissp. n.,Georissakinabatanganensissp. n., andGeorissasepulutensissp. n.