Two new species of Tmethypocoelis Koelbel, 1897 (Decapoda, Brachyura, Dotillidae) from Sulawesi, Indonesia

By

Murniati, Dewi
Asakura, Akira
Davie, Peter

Type

Article

Date of Publication

2023

Original Publication

ZooKeys

Volume

1156

Pages

159--190

Subjects

Biogeography , Celebes , dotillid crabs , gastric mill , Morphology

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/zookeys.1156.98930

 

Abstract

Tmethypocoelis Koelbel, 1897, is a central Indo-West Pacific genus of small intertidal, soft sediment dotillid crabs that includes five recognised species. Two new species, Tmethypocoelis simplexsp. nov. and T. celebensissp. nov., are here described from Sulawesi, Indonesia. Tmethypocoelis simplexsp. nov. is found on the west coast of Central Sulawesi, while T. celebensissp. nov. occurs in the north-eastern part of Sulawesi. Both new species differ from each other and known congeners by the male cheliped, male pleon, and male first gonopod characters. The differences in gastric mill morphology further confirm the two species as new. The distinct water current patterns in the Makassar Strait and the Maluku Channel might have contributed to the evolution of these two sibling species.