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Takeda & Kim, 1977

Carapace extremely convex fore and aft for its anterior half, very sunken posteriorly and concave postero-laterally. Its dorsum well divided into granulated, depressed areolae by wide but shallow furrows, being everywhere covered with short, erect stiff setae. Frontal areola not convex at all. An areola behind frontal areola more or less longitudinally ovoid; a small protuberance near its postero-lateral end. Protogastric areola prominently large, regularly convex fore and aft, bearing a longitudinal short incision at anterior outer one-third. Metagastric areola with a median longitudinal furrow from behind. Hepatic areola oblique and similar to, but smaller than, outer branchial areola. Inner branchial areola separated from outer transverse one by an oblique shallow furrow, and from metagastric areola by a deeper furrow. Cardiac areola large, indistinctly subdivided into two; antero-external angles so truncated that cardiac areola is of appearance convex forward as a whole; median longitudinal furrow really shallow and only indicated by interruption of granules. Postero-lateral part of dorsum nearly devoid of granules and markedly concave near inner branchial and cardiac areolae.
Front strongly declivous anteriorly, being cut into two lobes by a median small notch; each lobe not round; lateral lobule conical. Supraorbital border weakly raised, bordered with several conical granules, bearing two notches; median part only with two granules on its margin, and smooth dorsally. External orbital angle rather similar to following three antero-lateral teeth, each of which is armed with a spiniform granule at its anterior end and associated with some minute granules on its posterior slope.
Chelipeds heavy and quite unequal. Merus short, stout and not exerted beyond carapace; its upper border armed with distal and subdistal spine-tipped teeth, though in holotype subdistal one is rather worn out without a spine. Carpus large and palm high as usual; outer surface of palm densely covered with conical or rather tuberculated granules. Ambulatory legs comparatively slender, especially so in first two pairs. Anterior border of merus rather thin. Upper surface of carpus ornamented with a longitudinal shallow furrow, but bears no granules. (Takeda & Kim, 1977: 135)

Type locality: Seogwipo, Cheju-do, Korea.
Range: Korea - Seogwipo, Cheju-do (Kim, 1973, Takeda & Kim, 1977), Mosulpo (Kim & Chang, 1985).

Actumnus marissinicus