The Indonesian Species of Macrophthalmus Desmarest, 1823, with The Description of a New Species (Crustacea: Decapoda: Brachyura: Macrophthalmidae)

Fourteen species of Macrophthalmus Desmarest, 1823, are reported from Indonesia, of which two species, Macrophthalmus (Macrophthalmus) abbreviatus Manning & Holthuis, 1981, and M. (Macrophthalmus) sulcatus malaccensis Tweedie, 1937, are recorded for the first time from the region, and one new species M. (Mareotis) fusculatus n. sp. is described. The new species resembles M. (Mareotis) definitus Adams & White, 1849, in the relatively narrow male abdomen and moderately long, curved tip of the male G1. However, the differences are noticeable in the morphology of the carapace of the new species which is divergent posterolateraly, the presence of tubercles on the gastric, cardiac and intestinal regions, and the absence of a longitudinal row of granules or setae on the branchial region. Zootaxa, Vol. 3158. Hal. 20-36 ISSN 1175-5326