Abstract
Mirograpsus asper is described as a new genus and new species in the subfamily Ilyograpsinae Števčić, 2005, of the family Macrophthalmidae Dana, 1851, on the basis of a single male specimen from Ishigaki Island, Ryukyu Islands, Japan. The new genus most closely resembles the monotypic Apograpsus Komai & Wada, 2008 (type species, Ilyograpsus paantu Naruse & Kishino, 2006), sharing a similar carapace shape, but is differentiated chiefly by the fusion of the male pleomeres 4–6 and the unarmed meri of the ambulatory legs. The functional fusion of the male pleomeres 4–6 is unique in the Macrophthalmidae.
References
Ahyong, S.T. (2014) Paramoguai kavieng, a new genus and species of camptandriid crab from Papua New Guinea (Crustacea: Brachyura). Zootaxa, 3856 (4), 578–584.
https://doi.org/10.11646/zootaxa.3856.4.6
HTML Mapping Table
Barnes, R.S.K. (2010) A review of the sentinel & allied crabs (Crustacea: Brachyura: Macrophthalmidae), with particular reference to the genus Macrophthalmus. Raffles Bulletin of Zoology, 58, 31–49.
Dana, J. (1851) On the classification of the Crustacea Grapsoidea. American Journal of Science and Arts, Series 2, 12, 283–291.
Davie, P.J.F. (2009) A new genus and species of Macrophthalmidae (Crustacea: Brachyura: Ocypodoidea) from the Northern Territory, Australia. Crustaceana, 82, 815–827.
https://doi.org/10.1163/156854009X427360Davie, P.J.F. (2012) A review of Macrophthalmus sensu lato (Crustacea: Decapoda: Macrophthalmidae) from Australia, including two new species and new records. Memoirs of the Queensland Museum, Nature, 56, 149–219.
Komai, T. & Wada, K. (2008) A revision of the estuarine crab genus Ilyograpsus (Crustacea: Decapoda: Brachyura: Macrophthalmidae), with descriptions of a new genus and one new species. Raffles Bulletin of Zoology, 56, 357–384.
Naderloo, R. (2013) The sentinel crabs of the genus Chaenostoma Stimpson, 1858 (Crustacea: Brachyura: Macrophthalmidae), with description of a new species and new records. Journal of Natural History, 47, 2835–2848.
https://doi.org/10.1080/00222933.2013.807948
Naruse, T. & Kishino, T. (2006) New species of Ilyograpsus from the Ryukyu Islands, Japan, with notes on I. nodulosus Sakai, 1983. Crustacean Research, 35, 67–78.
https://doi.org/10.18353/crustacea.35.0_67
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, 17 (Supplement), 1–286.
Tan, C.G.S. & Ng, P.K.L. (1999) A revision of the genus Camptandrium Stimpson, 1858 (Crustacea: Decapoda: Brachyura: Camptandriidae). Raffles Bulletin of Zoology, 47 (1), 193–219.
Teng, S.-J., Shih, H.-T., Naderloo, R. & Corbari, L. (2016) A review of the Chaenostoma boscii species-complex (Decapoda: Brachyura: Macrophthalmidae) from the Indo-West Pacific. Crustacean Research, 45, 15–27.
https://doi.org/10.18353/crustacea.45.0_15
Števčić, Z. (2005) The reclassification of brachyuran crabs (Crustacea: Decapoda: Brachyura). Natura Croatica, 14 (1), 1–159.