Micas lucasi

Poore, Gary C. B., Guinot, Danièle, Komai, Tomoyuki & Naruse, Tohru, 2016, Reappraisal of species attributed to Halicarcinus White, 1846 (Crustacea: Decapoda: Brachyura: Hymenosomatidae) with diagnosis of four new genera and one new species from New Ireland, Papua New Guinea, Zootaxa 4093 (4), pp. 480-514 : 495-496

Micas lucasi (Richer de Forges, 1993) n. comb.

( Fig. 5)

Halicarcinus lucasi Richer de Forges, 1993: 12–13, fig. 2. — Poore 2004: 394.

Material examined. Holotype. Tasman Sea, Taupo Seamount, 33°16.85'S, 156°09.15'E, 244 m, AM P.39429 (ovigerous female, 2.2 mm).

Distribution. Taupo Seamount, Tasman Sea, 244 m (known only from type locality).

Remarks. Micas lucasi is known from a single minute but apparently adult female. In the absence of male features the species appears closest to Micas Ng & Richer de Forges, 1996. The female has one subterminal tooth on pereopodal dactyli as does M. filholi (other species of Micas have two subterminal teeth and species of all other genera dealt with here have several teeth along much of the length of the dactylus). Micas lucasi differs from the other four species of the genus in having free pleomeres in the female and a narrow rod-like rostrum without tubercles associated with the rostum, rather than a short rostrum and similar preocular tubercles. A similar rostrum is found in Neorhynchoplax minima (Lucas & Davie, 1982) , an estuarine species. Neorhynchoplax minima has a narrow maxilliped 3, fused pleomeres and has several dactylar spines, all typical features of that genus.

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