Abstract
A new sentinel crab of the genus Macrophthalmus is described from Mayotte Island, western Indian Ocean. The new species is remarkable by its very small size, with a carapace width not longer than 5.5 mm for the largest ovigerous females. It is closely related to Macrophthalmus (Chaenostoma) boscii Audouin, 1826.Affinities of these two species are discussed.References
Audouin, J.V. (1826) Explication sommaire des planches de Crustacés de l'Egypte et de la Syrie, publiées par Jules-César Savigny, Membre de l'Institut; offrant un exposé des caractères naturels des genres, avec la distinction des espèces. In: Savigny, J.-C. Description de l'Egypte, Histoire naturelle, Paris 1(4), 77–98.
Barnes, R.S.K. (1967) The Macrophthalminae of Australasia; with a review of the evolution and morphological diversity of the type genus Macrophthalmus (Crustacea: Brachyura). Transactions of the Zoological Society of London, 31, 195–262.
Barnes, R.S.K. (1977) Concluding contributions towards a revision of, and a key to, the genus Macrophthalmus (Crustacea: Brachyura). Journal of Zoology, 182, 267–280.
Barnes, R.S.K. (2010) A review of the sentinel and allied crabs (Crustacea: Brachyura: Macrophthalmidae) with particular reference to the genus Macrophthalmus. Raffles Bulletin of Zoology, 58(1), 31–49.
Bouchard, J.-M., Poupin, J., Cléva, R., Dumas, J. & Dinhut, V. (2009) Rapport de mission du 2 au 22 novembre. Mission Crustacés Mayotte 2009. Rapport Kraken Underwater Works, KUW, Mamoudzou, Mayotte, 151 pp http://crustaceamayotte.free.fr.
Froglia, C. (1978) The Identity of Macrophthalmus franchettii Maccagno, 1936 (Decapoda, Ocypodidae). Crustaceana, 34(2), 222–224.
Komai, T., Goshima, S. & Murai, M. (1995) Crabs of the genus Macrophthalmus of Phuket, Thailand (Crustacea, Decapoda, Ocypodidae). Bulletin of Marine Science, 56(1), 103–149.
Lewinsohn, C. (1977) Die Ocypodidae des Roten Meeres (Crustacea, Decapoda, Brachyura). Zoologische Mededelingen, 152, 45–84.
Maccagno, T. (1936) Crostacei di Assab. Decapodi, Stomatopodi, Anfipodi. Annali del Museo Civico di Storia Naturale di Genova, 59, 171–186.
Mendoza, J.C.E. & Naruse T. (2009) A new species of Macrophthalmus Desmaret, 1823 (Crustacea: Decapoda: Brachyura: Macrophthalmidae) from Bohol Island, the Philippines. Raffles Bulletin of Zoology, 57(2), 475–480.
Miers, E.J. (1884) Crustacea. In: Report on the Zoological Collection Made in the Indo-Pacific Ocean During the Voyage of H.M.S. Alert, 1881-1882. Part I, The collections from Melanesia. British Museum, London, 178–322, pls. 18–34.
Ng, P.K.L., Davie, P.J.F. & Guinot, D. (2008) Systema Brachyurorum: Part 1. An Annotated checklist of extant Brachyuran crabs of the world. Raffles Bulletin of Zoology, supplement 17, 1–286.