Macrophthalmus convexus, Stimpson, 1858

Murniati, Dewi Citra, Asakura, Akira, Nugroho, Dharma Arif, Hernawan, Udhi Eko & Dharmawan, Wayan Eka, 2022, On a collection of thoracotreme crabs (Crustacea: Brachyura: Ocypodidae, Macrophthalmidae, Dotillidae) from two offshore islands of Papua, eastern Indonesia, with descriptions of two new species, Raffles Bulletin of Zoology 70, pp. 461-491 : 481

Key to the species of the Macrophthalmus convexus group (adapted from Barnes, 2010; Davie, 2012; Shih et al., 2015)

1. Chelae large and elongate, with clearly differentiated teeth on cutting margins of fingers .......................................................2

– Chelae small and feeble (as in those in female Macrophthalmus ), with poorly differentiated or no teeth on cutting margins of fingers ......................................................................................3

2. Lateral margin of carapace with three anterolateral teeth (including external orbital angle); G1 with apical portion not truncated, armed with one short, arched chitinous process; posterior margin of propyloric ossicle of median tooth plate with wide and nearly flat shape, lateral tooth plate with 13–14 teeth, anterior tooth short and stout............. M. ( M.) convexus

– Lateral margin of carapace with two anterolateral teeth (including external orbital angle); G1 with apical portion truncated, armed with C-shaped chitinous process; posterior margin of propyloric ossicle of median tooth plate with narrow and acute shape, lateral tooth plate with 15–16 teeth, anterior tooth short and slender......... M. ( M.) manggala , new species

3. Fixed finger of male with long, low tooth along proximal half of cutting margin; apical portion of G1 not truncated, armed with one pointed chitinous process ......... M. ( M.) parvimanus

– Fixed finger of male with small, distinct quadrangular tooth on median of cutting margin; apical portion of G1 truncated, without chitinous process........................ M. ( M.) consobrinus