The whole body is clothed with hard carapace, the back is gray-green or brownish red, the cephalothorax is broad, the carapace is slightly fan-shaped, about 6 cm long and 9 cm wide; there are 6 obvious cuspidate teeth on the front frontal margin; there are also 6 broad serrations on the anterior lateral margins, and there is 1 pair of eyes with short stalks on both sides of the frontal side, which can be movable. The mouthparts consist of 3 pairs of jaw feet, with 2 pairs of large and small antennae at the anterior end. Thoracic limbs 5 pairs, the first pair of powerful chelicerae, the second to fourth pair, long and flat. The terminal claw-like, suitable for crawling, the last pair, flattened and wide, terminal segments lamellate, suitable for swimming. Abdomen reduced, folded below the cephalothorax, no caudal segment and caudal limbs, female abdomen is rounded, male is triangular, abdominal limbs are reduced, hidden in the inner side of the abdomen, 4 pairs of females, used to hold the eggs; males only 2 pairs, and has been specialization for mating apparatus.

The cephalothoracic armor is transversely ovoid with a raised surface. Gastric and longitudinal regions often with microscopic transverse granular ridges. Frontal slightly protuberant, divided into 6 acute teeth, middle two teeth more protuberant, inner eye fossa teeth larger than any frontal teeth. Dorsal margin of fovea with 2 sutures, ventral margin with one suture. Anterolateral margins arched, including outer foveal tooth **** with 6 acute teeth. Chelicerae large, not quite symmetrical, anterior margin of long segment generally with 3 strong spines, basal one smallest, inner terminal corner of carapace with one strong spine, outer surface with 3 small spines, metacarpal segment thick, outer and inner surfaces elevated, dorsal surface*** with 5 teeth, outer basal corner of metacarpal segment with one, dorsal surface of each of the two elevated ridges with two, two fingers longer than metacarpal segment with longitudinal grooves on surface. The dorsal and ventral margins of each segment of the steppe are setose, and the long segment of the swimming foot is armed with a sharp spine near the end of the posterior green, while the anterior segment and the phalanges are flattened and paddle-shaped. The abdomen is triangular in males and oblong in females, densely covered with soft hairs. The cephalothorax is 59.4 mm long and 89.7 mm wide.