The identity of Chiromantes obtusifrons (Dana, 1851), previously considered widespread in the tropical West Pacific region to the eastern Indian Ocean, is revised and found to be a species-complex. Chiromantes obtusifrons is now considered endemic to the Hawaiian Is., and four new species are described from Guam, Taiwan and Christmas Island. Two species live sympatrically in Taiwan. Species separation is based on carapace and frontal shape and granulation, leg proportions, abdominal somite proportions, and distinctive live colouration.
Key words: Sesarmidae, Chiromantes, intertidal, Christmas Island, Indian Ocean, Taiwan, Guam, Hawaiian Islands, Western Pacific, new species, taxonomy
|Chiromantes obitusifrons endemic to Hawaii Islands|
|Chiromantes garfunkel | Chiromantes silusChiromantes leptomerus | Chiromantes eurymerus|
The real Chiromantes obitusifrons is now known to be endemic to Hawaii Islands, while C. garfunkel sp. nov. is endemic to Christmas Island, Indian Ocean. Chiromantes silus sp. nov. is endemic to Guam. Chiromantes leptomerus sp. nov. is known from Taiwan and the Ryukyu Islands, southern Japan while Chiromantes eurymerus sp. nov. is endemic to Taiwan.
Davie, P.J.F & P.K.L. Ng, 2013. A review of Chiromantes obtusifrons (Dana, 1851) (Decapoda: Brachyura: Sesarmidae), with descriptions of four new sibling-species from Christmas Island (Indian Ocean), Guam and Taiwan. Zootaxa. 3609(1):1-25