Carapace quite large (for the genus); lateral outline subtrapezoidal, rectilinear; anterior and posterior margin narrowly rounded; dorsal angle conspicuous; ventral margin fairly straight. Zone of concrescence mostly medium sized, but fairly wide anteroventrally; radial pore canals mostly straight, but also few ramified; calcified inner lamella wide, vestibules fairly closed. In all specimens LV larger than, and overlapping RV anterodorsally, posterodorsally and ventrally.
Antennulae and antennae with slender podomeres and setae. Podomeres II and III of antennulae fused, no suture visible. Length of podomere IV of Antenna approximately two times length of podomere III. Base of mandibula with one conical plus four or five tricuspidate teeth-like setae; exopodite with one reduced plus six or seven medium-sized setae. Vibratory plate of maxillula with two strahlen plus around 16 feathered setae. Exopodite of fifth limb with three proximal and seven distal setae; podomere V of fifth limb (= palp podomere IV) with short and thick, terminal claws, dorsal one shortest, medial one longest. Male fifth limb very asymmetrical, right appendage with one very long and thick modified seta (= peg), plus one short, modified seta (= peg) and one short, simple seta on podomere II (palp podomere I); podomere III smoothly curved; left appendage with two short, modified setae (= pegs), and one short, simple seta on podomere II (palp podomere I); podomere III pointed at 90°. Podomere II of sixth limb with three long setae; podomere VI with one long and one medium-sized claw, and one short seta. Furca with symmetrical, barbed rods, and short, thick, distal setae fused to rod. Male copulatory limb subtrapezoidal in outline; copulatory process trisegmented, proximal element thick, robust, rod-shaped; weakly sclerotized, irregularly shaped medium element; and ‘cactus’-shaped terminal element. Zenker’s organ with thin central, sclerotized tube, terminal bulb medium-sized; vas deferens arranged in few loops, shorter than central tube. Genital lobes suboval.