A marine species of crab.
It was dredged in Suvadiva, North Male, Miladumadulu, and South Nilandu Atolls, in 25—4.3 fathoms during a 1899-1900 expedition. (Borradaile, p. 247)
This species seems to be akin to Pilumnus caerulescens, which is included in Major Alcock's list of Indian Crabs, but the colour and the spiniform orbital angle serve to distinguish it.
"A Pilumnus with the carapace convex both fore and aft and from side to side, smooth, pubescent and hairy, the regions faintly marked; the middle lobes of the front prominent, the outer lobes very small; the lower rim of the orbit finely toothed, the upper rim smooth, with traces of two notches; the antero-lateral edge short, with three spiniform teeth and a spine on the orbital angle; the chelipeds unequal, granular and hairy outside, a small bare patch at the base of the fingers and along the lower edge of the greater hand, fingers moderately long, smooth; and the walking legs of moderate length and stoutness, hairy and pubescent, and without thorns on the meropodites."
Colour in spirit : yellowish-white, fingers white.
(Borradaile, p. 247)
Length: 4 mm. Breadth: .5 mm.(Largest specimen) (Borradaile, p. 247)
