Dorsal surface of carapace smooth, without carinae. Rostral plate triangular, with rather convex lateral borders, its tip ending in a sharp spine. Lateral process of sixth thoracic somite spiniform and directed only slightly backward; that of seventh somite much larger and tuberculiform in dorsal view, with a sharp apex; that of eighth somite triangular and directed laterally. Raptorial dactylus with 13-15 spines. Dorsal surface of abdomen only with intermediate carina, which ends in a spine each at fourth and fifth somites; posterior borders of third to fifth somites variously ornamented with spinules; a strong submedian carina on sixth somite, ending posteriorly in a spinule. Telson rounded and armed with four pairs of teeth, each of which is tipped with a movable spine; in addition to a median carina, a submedian carina radiating from base to outer second tooth.
Distribution:
Off east coast of Florida, the Gulf of Mexico, Suriname and French Guiana in the West Atlantic, and off Maui Island in the Hawaiian Islands, 604-1,281 m deep.