Macrophthalmus (Paramareotis) erato De Man , 1888

Rahayu, Dwi Listyo & Nugroho, Dharma Arif, 2012, The Indonesian species of Macrophthalmus Desmarest, 1823, with the description of a new species (Crustacea: Decapoda: Brachyura: Macrophthalmidae), Zootaxa 3158, pp. 20-36 : 33

Macrophthalmus (Paramareotis) erato De Man, 1888

( Figs. 8A, B )

Macrophthalmus erato De Man, 1888: 125 , pl. 8, figs. 12–14. — Tesch 1915: 179, pl. 8, fig. 9. Macrophthalmus (Mareotis) erato — Barnes 1970: 232, fig. 9.

Macrophthalmus (Paramareotis) erato — Komai et al. 1995: 140. — Barnes 2010: 42.

Material examined. 11 males (3.90 x 5.10 mm – 6.80 mm x 9.60 mm), 3 females (5.00 x 8.00 mm – 8.20 x 11.40 mm) ( ZRC 2011.1006), Ajkwa I., Papua, 0 8. 0 6.2004, 26.03.2007 and 27.05. 2007; 2 males (7.82 x 5.64 mm), 1 female (7.27 x 5.09 mm), Kamora River, Papua, 0 6. 05.2003; 5 males (4.10 x 5.60 mm – 6.50 x 9.2 mm), 6 females (4.50 x 6.30 mm – 8.60 x 12.20 mm), 1 ovig. (6.00 x 8.20 mm) ( MZB Cru 3278), Kamora I., Papua, 24.06.2008; 4 males (5.30 x 7.60 mm – 7.00 x 11.00 mm), 3 females (4.40 x 6.40 mm – 7.90 x 11.10 mm) (RCLA-C.B.0272- 0273), Ajkwa I., Papua, 19 March and 21.06.2008; 2 males (6.60 x 9.10 mm – 7.97 x 11.27 mm), 1 female (6.70 x 9.80 mm) (RCLA-C.B. 0274), Otakwa, Papua, 08.07.2008; 1 male (7.45 x 9.27 mm), 1 female (6.91 x 8.91 mm) (RCLA-C.B.0275), Ajkwa, Papua, 21.06.2008.

Remarks. The specimens examined agree well with the description given by Barnes (1970), except for the granulation and setation on the dorsal surface of the carapace. According to Barnes (1970) the carapace surface is covered with small, rounded granules except for the central gastric and cardiac regions, which are smooth, and the posterolateral margin being covered by thick setae. The granulation in the material examined is only on the small portion of the hepatic and branchial regions, and the posterolateral margin of the carapace is only very sparsely setose. Species-specific characters such as the large triangular protuberance and the row of 3–5 rounded tubercles on the lower orbital border, the large spine on the inner surface of the palm of the cheliped near articulation with the carpus are present in the Indonesian specimens.

Habitat. Muddy sand flats of lower intertidal zone in mangrove forests.

Geographical distribution. Mergui Archipelago, Peninsular Malaysia, southern China ( Barnes 1970), Indonesia (Madura; Tesch 1915), and now Papua

Figures

FIGURE 8. A, B, Macrophthalmus (Paramareotis) erato De Man, 1888, male (7.97 x 11.27 mm) (RCLA-C. B. 0274); C, D, Macrophthalmus (Paramareotis) quadratus A. Milne-Edwards, 1873, male (6.36 x 8.01 mm) (RCLA-C. B. 0276); E, F, Macrophthalmus (Venitus) latreille Desmarest, 1877, male (20.79 x 28.84 mm) (RCLA-C. B. 0277).