Macrophthalmus (Mareotis) crinitus Rathbun, 1913

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 : 27

Macrophthalmus (Mareotis) crinitus Rathbun, 1913

( Figs. 1 C, D)

Macrophthalmus crinitus Rathbun, 1913: 619 , pl. 75, fig. 3.

Macrophthalmus (Mareotis) crinitus — Barnes 1971: 22, fig. 5; 2010: 41, fig. 3C. Not M. crinitus Barnes, 1967 (= M. darwinensis Barnes, 1971 ).

Material examined. 1 male, (11.97 x 16.25 mm) (RCLA-C.B.0261), Sekotong, Lombok, 30.07.2005, 1 ovig. (11.45 x 16.36 mm) ( MZB Cru 3272), Sekotong, Lombok, 16.05.2007.

Remarks. The specimen in this study agrees well with the description of the species given by Barnes (1971). Barnes (2010) placed this species in M. crinitus group together with M. pacificus and M. darwinensis Barnes, 1971 . Macrophthalmus crinitus resembles M. darwinensis in having scattered granules on the branchial and hepatic regions of the carapace, which are obscured by short stiff setae, especially on the branchial region, one large and one small anterolateral teeth, and the presence of a mat of setae on the pereopod meri, carpi and propodi. Differences can be seen on the male chelipeds. In M. crinitus the fixed finger of the male chelipeds has a longitudinal ridge on the outer surface, and the cutting margin lacks a differentiated tooth, while in M. darwinensis the outer face of the fixed finger of the male chelipeds is without a longitudinal ridge and the cutting margin has long, crenulated teeth. Macrophthalmus pacificus differs from these two species in having a smooth dorsal surface of the carapace and the pereopod meri, carpi and propodi with only sparse setae.

Habitat. Sandy mud substrate of seaward fringe of mangrove forest.

Geographical distribution. Burma, Mergui Archipelago, eastern Indonesia ( Ambon, Ternate and Pulau Kaledupa, Sulawesi; Barnes 1971, 2010), and now Lombok.

Figures

FIGURE 1. A, B, Macrophthalmus (Chaenostoma) sinuspersici Naderlo & Türkay, 2010, male (7.63 x 9.43 mm) (RCLA- C. B. 0252); C, D, Macrophthalmus (Mareotis) crinitus Rathbun, 1913, male (11.97 x 16.25 mm) (RCLA-C. B. 0261); E, F, Macrophthalmus (Mareotis) pacificus Dana, 1851, male (11.11 x 15.21 mm) (RCLA-C. B. 0271).