Genus Lentilumnus

Galil & Takeda, 1988

Carapace lenticular, glabrous, regions unmarked. Antero-lateral margins of carapace convex, bearing three triangulate teeth. Postero-lateral margins strongly convergent, much longer than antero-latera1. Abdominal penultimate segment of male somewhat wider than long; ultimate segment as wide as long and rounded distally.
Interorbital margin horizontal, imperfectly divided into two obsolescent lobes. Orbit occupying antero-lateral angles. Eye with elongated columnar calcareous stalk, deeply fissured ventrally; small, hemispherical cornea. Upper orbital margin oblong, entire. Lower orbital margin minutely granulate, inferior orbital angle obsolete. Antennule folding transversely within subfrontal fosset. Basal antennal segment cylindrical, lying within orbital hiatus, nearly reaching supraorbital margin. Antennal flagellum 1.25 orbital length. Anterior margin of buccal frame sinuous, medially incised.
Third maxilliped exopod elongated, with rounded tooth at internal distal margin extending to distal angle of endopod. Ischium of endopod subrectangular, 1.5 meral length. Merus excavate at inner distal angle, inner margin medially produced. Inner lateral margins of both ischium and merus fringed with setae.
Chelipeds considerably unequal in both sexes. Frontal margin of ischium granulate. Merus barely projecting beyond lateral margin of carapace, granulate anteriorly. Carpus large, globose, covered externally with conic granules and bristles, inner angle produced, tuberculate. Manus of larger chela globose, of smaller chela subcylindrical. Outer surface of manus convex, entirely covered with tubercles and bristles. Dactylus curved, smooth but for few tubercles near articulation with chela. Pereiopods laterally compressed, setose. Dactylus slender, tapering to an elongate cornute apical tooth. First male pleopod sinuous, distally curved, pilumnoid. (Galil & Takeda, 1988)

Type species: Glabropilumnus latimanus Gordon, 1934.

Species treated:
Lentilumnus spinidentatus (Garth & Kim, 1983)

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