Indopinnixa Manning & Morton, 1987

Ng, Peter K. L., 2014, Indopinnixa shellorum, a new species of pea crab (Crustacea: Brachyura: Pinnotheridae) associated with a sipunculid from Singapore, Raffles Bulletin of Zoology 62, pp. 696-700 : 696

Indopinnixa Manning & Morton, 1987

Remarks. Naruse & Maenosono (2012: 223) reviewed the status of Indopinnixa , documenting the wide range of variation in the carapace structure as well as the extent of fusion of the male abdominal somites, ranging from somites 3–6, 4–6, and only 5 and 6. They noted that the male abdominal condition in some species of Pinnixa

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White, 1846, also overlapped with that of Indopinnixa , contravening one of the supposedly diagnostic characters of the genus observed by Manning & Morton (1987); which is having male abdominal somites 5 and 6 fused. In I. shellorum , new species, male abdominal somites 4–6 are immobile, despite all the sutures between them being distinct. As has been discussed in Ng et al. (2008: 14), they should be regarded as functionally fused (see also Ng & Chia, 1994).

Naruse & Maenosono (2012) suggested that Indopinnixa will probably have to be redefined in the context of a revision of Pinnixa , which clearly contains several morphologically distinct groups. The taxonomic position of some taxa (notably I. oryza , which has an atypical male abdomen and G1 for an Indopinnixa species ) will have to re-appraised at that time.