Miers, 1876
Eyestalks short or at least not more than half length exposed in dorsal view; flagellum of antenna excluded from orbit by a process of the basal antennal article; orbit open ventrally, basal antennal article widely separated from postorbital lobe; postorbital lobe excavate or `cupped' anteriorly, the cornea of retracted eye protected; preorbital angle of eave smooth, rounded; rostral spines without a lateral accessory spine; carapace densely spinose or tuberculate dorsally; large species (usually longer than 40 mm, sometimes up to 110 mm). (Davie 1996)
Type species: Paramithrax (Leptomithrax) longimanus Miers, 1876, by subsequent designation of Miers, 1879.
Species treated:
Leptomithrax bifidus Ortmann, 1893
Leptomithrax edwardsi (de Haan, 1839)
Leptomithrax kiiensis Sakai, 1969