Scammarctus, Holthuis, 2002

Holthuis, Lipke B., 2002, The Indo-Pacific scyllarine lobsters (Crustacea, Decapoda, Scyllaridae), Zoosystema 24 (3), pp. 499-683 : 520

Genus Scammarctus n. gen.

TYPE AND ONLY SPECIES. — Scyllarus batei Holthuis, 1946 (= Arctus orientalis Bate, 1888 ) by present designation.

ETYMOLOGY. — From skamma (Greek, latinized to scamma), trench, gutter, and Arctus De Haan, 1849 , a junior synonym of Scyllarus Fabricius, 1775 ; in reference to the characteristic gutter-like anterior part of the thoracic sternum.

DIAGNOSIS. — Carapace with only pregastric, gastric and cardiac teeth in the median line; rostral tooth absent. Few tubercles between the carapace ridges. Abdomen with a slightly elevated median carina, without narrow arborescent grooves. Fourth antennal segment with a single oblique dorsal carina. Pereiopods slender. Dactyli of P.3-P.5 with a pair of dorsal fringes of short hairs. No hairy fringe on the dorsal margin of propodus of P.4 and P.5. Anterior part of thoracic sternum gutter-like sunken and prolonged forward between the bases of the third maxillipeds; its anterior margin convex, sometimes with a small median tubercle, not incised in the median. No median tubercles on the sternum and no posterior teeth.

DISTRIBUTION. — Indo-West Pacific region.