The freshwater crabs of Danum Valley Conservation Area in Sabah, East Malaysia, with a description of a new species of Thelphusula Bott, 1969 (Crustacea, Brachyura, Gecarcinucidae, Potamidae, Sesarmidae)

By

Ng, Peter K. L.
Ng, Paul

Type

Article

Date of Publication

2018

Original Publication

ZooKeys

Volume

760

Pages

89-112

Subjects

Arachnothelphusa , Borneo , Geosesarma , Isolapotamon , Parathelphusa , phytotelm , taxonomy , Terrathelphusa , Thelphusula capillodigitus

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/zookeys.760.24787

 

Abstract

Seven species of freshwater crabs from three families are recorded from and around the Danum Valley Conservation Area in Sabah, Malaysian Borneo:Thelphusulacapillodigitussp. n.,ThelphusuladicerophilusNg & Stuebing, 1990,ArachnothelphusaterrapesNg, 1991,TerrathelphusaseculaNg & Tan, 2015,ParathelphusavalidaNg & Goh, 1987 (new record) (Gecarcinucidae);IsolapotamoningeriNg & Tan, 1998 (Potamidae); andGeosesarmadanumenseNg, 2002 (Sesarmidae). The new species ofThelphusulaBott, 1979, can be distinguished from all congeners by a unique combination of morphological features, most notably the presence of dense patches of short setae on the fingers of the adult male chelipeds, as well as the structure of the male first gonopod.Arachnothelphusaterrapesis confirmed to be a phytotelm species. A key to all species in the conservation area is provided.