Saturday, February 21, 2015

[Crustacea • 2015] Geosesarma dennerle & G. hagen • New Species of “Vampire Crabs” (Geosesarma De Man, 1892) from central Java, Indonesia, and The Identity of Sesarma (Geosesarma) nodulifera De Man, 1892 (Crustacea, Brachyura, Thoracotremata, Sesarmidae)


Fig. 6. Colours in life. A–C, Geosesarma dennerle, new species, Cilacap, Java;
D–F, G. hagen, new species, Cilacap, Java.

A, B, specimens from type series; C, male (13.1 × 11.7 mm) (ZRC 2014.0271). A, B: 7°25’59”S, 108°55’50”E, Cilacap, Java; F, 7°27’50”S, 108°50’16”E, Cilacap, Java; C–E, from aquarium trade, from Cilacap, Java
(Photographs: Chris Lukhaup [A, B, F]; Tan Heok Hui [C];
Oliver Mengedoht (specimens not preserved) [D, E]).

Abstract
 Two new species of land-dwelling sesarmid crabs of the genus Geosesarma De Man, 1892, are described from central Java, Indonesia. These species have been in the aquarium trade for many years and go by the popular name of “vampire crabs”. The two species, here named Geosesarma dennerle and G. hagen, are formally described and compared with their closest congeners in Java, G. noduliferum (De Man, 1892) and G. bicolor Ng & Davie, 1995. The identities of G. noduliferum, the type species of the genus, and G. confertum (Ortmann, 1894) are also clarified. 

Key words. Crustacea, Brachyura, Sesarmidae, Geosesarma, new species, taxonomy, Java, Indonesia


Geosesarma dennerle Ng, Schubart & Lukhaup, 2015
A, specimens from type series; C, male from aquarium trade, from Cilacap, Java; type locality

Geosesarma hagen Ng, Schubart & Lukhaup, 2015
[left] specimens from aquarium trade, from Cilacap, Java; D, type locality of G. hagen, new species; E, adult on bank of stream; F, an adult male of on moss covered stream bank.



Peter K. L. Ng, Christoph D. Schubart and Christian Lukhaup. 2015. New Species of “Vampire Crabs” (Geosesarma De Man, 1892) from central Java, Indonesia, and The Identity of Sesarma (Geosesarma) nodulifera De Man, 1892 (Crustacea, Brachyura, Thoracotremata, Sesarmidae). Raffles. Bull. Zool. 63.

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