Macrophthalmus (Macrophthalmus) milloti Crosnier 1965
Macrophthalmus ( Macrophthalmus ) milloti Crosnier, 1965 (Figs. 9, 10) ? Macrophthalmus podophthalmus— Lanchester 1900: 760. (not M. podophthalmus Souleyet, 1841) Macrophthalmus telescopicus— Kemp 1919: 387 (part), pl. 24 (11) [not pl. 24 (10) = M. serenei Takeda & Komai, 1991]. (not M. telescop...
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2015
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Online Access: | https://dx.doi.org/10.5281/zenodo.3510728 https://zenodo.org/record/3510728 |
Summary: | Macrophthalmus ( Macrophthalmus ) milloti Crosnier, 1965 (Figs. 9, 10) ? Macrophthalmus podophthalmus— Lanchester 1900: 760. (not M. podophthalmus Souleyet, 1841) Macrophthalmus telescopicus— Kemp 1919: 387 (part), pl. 24 (11) [not pl. 24 (10) = M. serenei Takeda & Komai, 1991]. (not M. telescopicus Owen, 1839) Macrophthalmus cf. telescopicus— Tweedie 1937: 164; 1950, 128 (part). Macrophthalmus milloti Crosnier, 1965: 112, figs. 217–220, 222, 223, 228, pl. 11 (4) [type locality: Madagascar]; 1975: 737; Barnes 1977: 276 (key); Takeda & Komai 1991: 166, fig. 1. Macrophthalmus ( Macrophthalmus ) milloti— Barnes 1967: 203 (list); Seréne 1973: 112, pl. 4 (A–C); Barnes 1976: 135, fig. 3; Takeda & Nunomura 1976: 81; Morgan 1990: 60; Komai et al. 1995: 116, fig. 6; Davie 2002: 352, 353; Nagai et al. 2006: 13 (key), figs. 4g, h, 5 e, f, i; Ng et al. 2008: 237 (list); Rahayu & Nugroho 2012: 24, fig. 3 C, D. ? Macrophthalmus ( Macrophthalmus ) telescopicus— Barnes 1967: 205 (part), pl. 1 (a); 1970: 219. Macrophthalmus verreauxi— Jeng 1997: 18, 22 (list). (not M. verreauxi H. Milne Edwards, 1848) Macrophthalmus serenei— Ng et al. 2001: 38 (list). (not M. serenei Takeda & Komai, 1991) Material examined. Taiwan : 1 ♀ (12.2 mm) (ASIZ C 684 J0177), Nanwan, Pingtung, coll. M.-S. Jeng, 14 Mar. 1987; 1 ♀ (11.5 mm) (ASIZ 70999), Nanwan, Pingtung, coll. M.-S. Jeng, 8 Mar. 1997. Comparative material . M. milloti : Ryukyu Islands , Japan: 2 ovig. ♀♀ (14.2, 17.0 mm) (RUMF-ZC- 276), Iriomote Island, coll. T. Naruse, 24 Mar. 2005; 1 ♂ (9.4 mm), 2 ♀♀ (12.6, 14.4 mm, incl. 1 ovig.) (RUMF-ZC- 277), Ishigaki Island, coll. T. Naruse, 13 Apr. 2005; 1 ♂ (8.4 mm) (RUMF-ZC- 278), Ishigaki Island, coll. H. Oka & T. Masumoto, 21 Aug. 2005; 1 ♂ (15.7 mm) (RUMF-ZC- 279), Nakagusuku Bay, Okinawa Island, coll. H. Oka et al. , 25 Aug. 2005. M. serenei : Thailand : 1 ♂ (7 mm) (NCHUZOOL 14770), Amphoe Mueang, Phuket, coll. H.- T. Shih, 29 May 2012. Indonesia : 2 ♂♂ (12.3, 13.5 mm) (NCHUZOOL 14771), Nusa Dua, Bali, coll. H.-T. Shih, 16 July 2014. Diagnosis. Carapace (Fig. 9 J) smooth, 1.6–1.7 times wider than long; posterolateral region with clumps of granules; 3 well separated anterolateral teeth. Largest carapace width across first lateral teeth. Eyestalks slender, cornea exceeding first anterolateral tooth about one fourth of eyestalk length. Middle portion of epistome protuberant. Outer surface of palm (Fig. 9 L) with ridge near lower margin, extending to immovable finger. Cutting edges of fingers armed with small tuberculate teeth proximally; dactylus length almost equal to palm. Female gonopore with suboval operculum (Fig. 9 K), directed mesially; deep depression on sternite of sixth thoracic somite mesial to gonopore. Distribution. Red Sea, East Africa (Zanzibar, Comoros, Madagascar), India (Gulf of Mannar, Andaman Islands), Thailand (Phuket), Singapore (Pulau Senang), Indonesia, Japan (Ryukyu Islands), Taiwan (Pingtung), New Guinea, New Caledonia, Fiji, Hawaiian Island, and Australia (Torres Strait, Queensland, Lord Howe Island, Descartes Island, Shirley Island). Habitat. Coral reefs, sandy mud (Komai et al. 1995). Remarks . The two female specimens from Taiwan agree well with the description of M. milloti (Takeda & Komai 1991; Komai et al. 1995). The Taiwanese specimens form a clade with those from the Ryukyu Islands, sister to M. serenei , based on molecular evidence (Fig. 11). The diagnosis of males, based on the specimens from the Ryukyu Islands, is as follows. Palm (Fig. 9 B) of cheliped stout, outer surface smooth, with a raw of indistinct ridge close to lower margin; inner surface covered with long setae to base of fingers. Immovable finger straight, near middle of cutting edge with triangular tooth; proximal region of cutting edge of dactylus with square tooth. Terminal process of G 1 (Fig. 9 D–I) elongated, directed outward, with short thumb-like projection dorsally. This species is similar to M. serenei , and both species belong to the group of M. telescopicus Owen, 1839 (Barnes 2010). Macrophthalmus milloti , however, has shorter eyestalks and a shorter terminal G 1 process than in M. serenei . DNA results and discussion. A 567 bp segment of the 16 S and 658 bp segment of COI from 17 species of macrophthalmids and four species of outgroups were amplified and aligned (Table 1). The phylogenetic tree of the combined markers was reconstructed from Bayesian inference analysis, with the support value from the maximum likelihood analysis (Fig. 11). Although the genus Macrophthalmus is monophyletic with high supports, further subdivision within the genus is not clear, which is similar to the result of Kitaura et al. (2006) based on 16 S. The relationship of some groups agree with those of Kitaura et al. (2006) and Barnes (2010), including the M. brevis group, the M. convexus group and the M. telescopicus group within the subgenus Macrophthalmus . The M. brevis group is close to M. erato and M. quadratus of the subgenus Paramareotis and the close relationship between M. tomentosus and M. pacificus , as well as between M. banzai and M. japonicus . Macrophthalmus purpureocheir sp. nov. is highly supported, sister to M. crinitus , although their relationship is only supported weakly. The same applies to the sister relationship between M. serenei and M. milloti . : Published as part of Teng, Shao-Jyun & Shih, Hsi-Te, 2015, A new species of Macrophthalmus Desmarest, 1823 (Crustacea: Decapoda: Brachyura: Macrophthalmidae) from Taiwan, with notes on four new records, pp. 451-470 in Zootaxa 4058 (4) on pages 464-466, DOI: 10.11646/zootaxa.4058.4.1, http://zenodo.org/record/231687 : {"references": ["Crosnier, A. (1965) Crustaces Decapodes, Grapsidae et Ocypodidae. Faune de Madagascar, 18, 1 - 143, pls. 1 - 11.", "Lanchester, W. F. (1900) On a collection of Crustaceans made at Singapore and Malacca. Part I. Crustacea Brachyura. Proceedings of the Zoological Society of London, 48 (1), 719 - 770.", "Kemp, S. W. (1919) Notes on Crustacea Decapoda in the Indian Museum. No. XIII. The Indian species of Macrophthalmus. Record of the Indian Museum, 16, 383 - 394, pl. 24.", "Takeda, M. & Komai, T. (1991) Japanese species of the Macrophthalmus telescopicus complex (Crustacea: Decapoda: Brachyura: Ocypodidae). Bulletin of the National Science Museum, Tokyo, Series A (Zoology), 17, 165 - 171.", "Tweedie, M. W. F. (1937) The crabs of the family Ocypodidae in the collection of the Raffles Museum. Bulletin of the Raffles Museum, 13, 140 - 170.", "Barnes, R. S. K. (1977) Concluding contribution towards a revision of, and a key to, the genus Macrophthalmus (Crustacea: Brachyura). Journal of Zoology, Proceedings of the Zoological Society of London, 182, 267 - 280, 3 figs.", "Barnes, R. S. K. (1967) The Macrophthalminae of Australia, 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, figs. 1 - 16, pls. 1 - 4.", "Barnes, R. S. K. (1976) Contributions towards a revision of Macrophthalmus (Crustacea: Brachyura). VIII. A re-examination of the M. telescopicus (Owen) complex; the status of M. laevis A. Milne-Edwards; and the affinities of M. holthuisi Serene. Zoologische Mededelingen, 50, 133 - 151. [Leiden]", "Takeda, M. & Nunomura, N. (1976) Crabs collected by the Melanesia Expedition of the Osaka Museum of Natural History, 1958. Bulletin of the Osaka Museum of Natural History, 30, 61 - 92.", "Morgan, G. J. (1990) A collection of Thalassinidea, Anomura and Brachyura (Crustacea: Decapoda) from the Kimberley region of northwestern Australia. Zoologische Verhandelingen, 265, 1 - 90. [Leiden]", "Komai, T., Goshima, S. & Murai, M. (1995) Crabs of the genus Macrophthalmus of Phuket, Thailand (Crustacea: Decapoda: Ocypodidae). Bulletin of Marine Science, 56, 103 - 149.", "Davie, P. J. F. (2002) Crustacea: Malacostraca: Eucarida (part 2): Decapoda-Anomura, Brachyura. In: Wells, A. & Houston, W. W. K. (Eds.), Zoological catalogue of Australia. Vol. 19.3 B. CSIRO Publishing, Melbourne, pp. i - xiv + 1 - 641.", "Nagai, T., Watanabe, T. & Naruse, T. (2006) Macrophthalmus (Macrophthalmus) microfylacas, a new species of sentinel crab (Decapoda: Brachyura: Ocypodidae) from western Japan. Zootaxa, 1171, 1 - 16.", "Rahayu, D. L. & Nugroho, D. A. (2012) The Indonesian species of Macrophthalmus Desmarest, 1823, with the description of a new species (Crustacea: Decapoda: Brachyura: Macrophthalmidae). Zootaxa, 3158, 20 - 36.", "Jeng, M. - S. (1997) Studies on the land and aquatic decapod crustacean fauna of the Kenting National Park (II) - Communities of decapod crustaceans around the sea. Kenting National Park, Pingtung, Taiwan, ii + 66 pp. [in Chinese]", "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.", "Kitaura, J., Nishida, M. & Wada, K. (2006) The evolution of social behaviour in sentinel crabs (Macrophthalmus): implications from molecular phylogeny. Biological Journal of the Linnean Society, 88, 45 - 59. http: // dx. doi. org / 10.1111 / j. 1095 - 8312.2006.00609. x"]} |
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