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

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.

Genetic structure of Ilyoplax delsmani (Crustacea: Decapoda: Brachyura: Dotillidae) on the western Indonesian waters

“…These samples were collected from September until November 2020 and have been deposited in Museum Zoologicum Bogoriense (MZB), Directorate of Scientific Collection Management-BRIN, Indonesia. The fixation using gradual concentration of ethanol from 50% until 70% and the preservation using ethanol 90% following the previous study [13]. The morphology of these specimens is confirmed similar with the holotype specimens deposited in Naturalis Biodiversity Center (figure 2).…”