Abstract
Charybdis moretonensis Rees & Stephenson, 1966, is known only from the holotype and has been suspected to be conspecific with C. granulata (de Haan, 1833). Comparison of the holotype of C. moretonensis with a large series of C. granulata from Australia and various Indo-Pacific localities showed that the two nominal species are morphologically indistinguishable. Characters thought to distinguish the two species are not reliable, being based on a misinterpretation of the damaged holotype of C. moretonensis, the incomplete type description of C. beauforti Leene & Buitendijk, 1949 (= C. granulata), and a failure to account for allometric variation. Therefore, C. moretonensis is synonymised with C. granulata. We also report the largest known specimen of C. granulata and confirm its presence in eastern Australia.
References
Crosnier, A. (1984) Sur quelques Portunidae (Crustacea Decapoda Brachyura) des îles Seychelles. Bulletin du Muséum national d’Histoire naturelle, section A, series 4, 6(2), 397¨C418, pl. 1.
Davie, P.J.F. (2002) Crustacea: Malacostraca: Eucarida (Part 2): Decapoda¨CAnomura, Brachyura In: Wells, A. & Houston, W.W.K. (Eds.) Zoological Catalogue of Australia. Vol. 19.3B. CSIRO Publishing, Melbourne. 641 pp.
Haan, W. de (1833¨C1850) Crustacea In: von Siebold, Ph. F. (Ed.) Fauna Japonica sive descriptio animalium, quae in itinere per Japoniam, jusse et auspiciis superiorum, qui summum in India Batavia Imperium tenent, suscepto, annis 1823¨C1830 collegit, notis observationibus et adumbrationibus illustravit. A. Arnz, Lugdunum Batavorum, Leiden, 243 pp.
Leene, J.E. & Buitendijk, A.M. (1949) Note on Charybdis ihlei nov. spec., Charybdis beauforti nov. spec., and Charybdis edwardsi nom. nov., from the collections of the British Museum (Natural History), London. Bijdragen tot de Dierkunde, 28, 291¨C298, figs. 14.
Poore, G. C.B. (2004) Marine Decapod Crustacea of Southern Australia: a guide to identification. CSIRO Publishing, Melbourne, 574 pp.
Rees, M. & Stephenson, W. (1966) Some portunids (Crustacea: Portunidae) mostly from Queensland. Proceedings of the Royal Society of Queensland, 78(3), 29¨C42, pl. 7.
Sakai, T. (1976) Crabs of Japan and the Adjacent Seas. Kodansha Ltd., Tokyo. [In three volumes: xxix + 1¨C773 (English text), 1¨C461 (Japanese text), 1¨C16, pls. 1¨C251 (plates)].
Wee, D.P.C. & Ng, P.K.L. (1995) Swimming crabs of the genera Charybdis de Haan, 1833, and Thalamita Latreille, 1829 (Crustacea: Decapoda: Brachyura: Portunidae) from Peninsular Malaysia and Singapore. Raffles Bulletin of Zoology, Supplement 1, 1¨C128.
Yamaguchi, T. & Baba, K. (1993) Crustacean specimens collected in Japan by Ph. F. von Siebold and H. Bürger and held by the Nationaal Natuurhistorisch Museum in Leiden and other museums In: T. Yamaguchi (Ed.) Ph. F. von Siebold and natural history of Japan Crustacea. The Carcinological Society of Japan, Kumamoto, pp. 145¨C570.