Abstract
A new species of swimming crab belonging to the genus Catoptrus A. Milne-Edwards, 1870, is described based on a single female specimen collected from a submarine cave at Ie Island, Ryukyu Islands, Japan. The new species can be easily distinguished from all five congeners by its proportionally longer pereopods as well as by combinations of the characters of the carapace, eyes, and cheliped.
References
Milne-Edwards, A. (1870) Note sur le Catoptrus nouveau genre appartenant à la division des crustacés brachyoures catométopes. Annales des Sciences naturelles, Zoologie (Paris), ser. 5, 13, 82.
Ng, P.K.L. (2011) Pele ramseyi, a new genus and new species of anchialine swimming crab (Crustacea: Brachyura: Portunidae) from the Hawaiian Islands. Zootaxa, 2737, 34–48.
Ng, P.K.L. & Takeda, M. (2003) Atoportunus, a remarkable new genus of cryptic swimming crab (Crustacea; Decapoda; Brachyura: Portunidae), with descriptions of two new species from the Indo-West Pacific. Micronesica, 35–36, 417–430.
Ng, P.K.L., Guinot, D. & Davie, P.J.F. (2008) Systema Brachyurorum: Part I. An annotated checklist of extant brachyuran crabs of the world. Raffles Bulletin of Zoology, Supplement 16, 1–286.
Paul'son, O. (1875) Investigations on the Crustaceans of the Red Sea with Notes on Crustacea of the Adjacent Sea, Part 1, Podophthalmata and Edriophthalmata (Cumacea) with 21 Plates of Figures, xiv +144 pp., pls. 1–21, Kulzhenko, Kiev [in Russian].
Rafinesque, C.S. (1815) Analyse de la Nature ou Tableau de l'Univers et des Corps organisés. Palermo, pp. 12–24. Palermo.
Rathbun, M.J. (1906) The Brachyura and Macrura of the Hawaiian Islands. Bulletin of the United States Fish Commission, 23(3)[1903], 827–930, pls. 1–24.
Serène, R. (1966) Notes sur les genres Catoptrus et Lybistes et les Catoptrinae. Bulletin du Muséum national d’Histoire naturelle, (2)37(6), 929–1000.
Takeda, M. (1993) A new swimming crab of the genus Carupa from submarine caves in the Ryukyus. Bulletin of the National Science Museum, Tokyo, (A)19(4), 145–150.
Takeda, M. (2003) Atoportunus dolichopus, a new cavernicolous crab of the family Portunidae (Crustacea: Decapoda) from the Ryukyu Islands. Bulletin of the National Science Museum, Tokyo, (A)29(3), 141–146.
Yang, S.-L., Chen, H.-L. & Tang, B.-P. (2006) On two new species of Catoptrus A. Milne-Edwards, 1870 (Decapoda, Brachyura, Portunidae) from China. Crustaceana, 79(7), 835–842.