Macrophthalmus brevis (Herbst, 1804)

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), pp. 31-49 : 40

The Macrophthalmus brevis group

This comprises: M. abbreviatus Manning & Holthuis, 1981 , M. brevis ( Herbst, 1804) , M. crassipes H. Milne Edwards, 1852 , M. grandidieri A. Milne Edwards, 1867 , M. laevimanus H. Milne Edwards, 1852 , M. laevis A. Milne Edwards, 1867 and M. sulcatus H. Milne Edwards, 1852 which is divisible into a western M. sulcatus sulcatus and an eastern M. sulcatus malaccensis Tweedie, 1937 (see Barnes 1970 for details under the name M. dilatatus sulcatus ). In this group ( Fig. 2B ), the corneas are not positioned beyond lateral carapace margins and no style is present; carapace very broad (breadth> 2 × length), with a small pointed external orbital angle and larger, broad-based, flat, second lateral tooth; front narrow (breadth <14% that of carapace); male chela with spine/s near carpal joint, with elongate and usually downflexed fingers. Intertidal in muddy sandflats. The names M. gallardoi Serène, 1971 , M. hilgendorfi Tesch, 1915 and M. sandakani Rathbun, 1914 listed by Ng et al. (2008) as extant species are still, as earlier ( Barnes, 1977), regarded by this author as being synonyms of species within this group.

Figures

Fig. 2. Form of the carapace and adult male chela of subgroups of the genus Macrophthalmus II, the subgenus Macrophthalmus part 1: (a) M. telescopicus group, (b) M. brevis group, and (c) M. convexus group. Scale bars = 5mm.