Macrophthalmus dentatus, Stimpson, 1858

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

Macrophthalmus dentatus

The equally singular M. dentatus Stimpson, 1858 ( Fig. 3B ), only known from sublittoral material, similarly possesses the characteristic broad carapace (greatest breadth 2 × length), narrow front (breadth 10% that of carapace) and elongate but not projecting ocular peduncles of the subgenus Macrophthalmus , but although it otherwise shares some features with the M. telescopicus group (extremely elongate cheliped meri, short undeflexed fingers on the chelae) it is aberrant within the genus in possessing 4-5 anterolateral teeth occupying most of the lateral carapace margins, of which the external orbital angle is very large and flaring forwards and outwards, and in details of its carapace granulation, external maxilliped structure, and some other features (see Barnes, 1971).

Figures

Fig. 3. Form of the carapace and adult male chela of subgroups of the genus Macrophthalmus III: (a, b) the subgenus Macrophthalmus part 2, M. transversus (a) and Macrophthalmus dentatus (b); (c) the M. crinitus group of the subgenus Mareotis. Scale bars = 5mm.