E-Fauna BC: Electronic Atlas of the Wildlife of British Columbia

Carapace somewhat pear-shaped, with short triangular rostrum, and covered with blunt spines and soft setae. Eyestalk short and cone-shaped; cornea small. Chelipeds unequal in size, the larger covered with flat, wart-like masses of granules; fingers spoon-like. Smaller cheliped and walking legs setose with minute sharp granules. Walking legs subcylindrical with short stout dactyls, strong movable spines ventrally, and a strong curved claw. Abdomen soft with basal and terminal segments strengthened by flat calcareous plates.

Carapace: male 30 x 25 mm, female 22 x 20 mm.

Carapace grey-brown and white, with orange granules surrounding white, and with dark red setae and gold bristles. Colour often masked by mud. Large cheliped with ischium and merus blue-grey or tan with red-brown areas; carpus tan with blue-violet or white granules and flat blue granules laterally. Hand brownish with granules violet-blue and pale blue to white laterally; fingers violet and violet-blue granules with smooth tips tan. Small cheliped with ischium and merus white or tan, and a maroon network with a turquoise stripe. Carpus and hand brown with white-tipped orange knobs, red and gold setae, and fingers darker brown with orange tips and dark brown setae. Walking legs white or tan with maroon streaks, green, red and white setae; granular knobs chocolate brown with white tips; dactyl maroon deep yellow with black spines and claw. Eyestalk brown and white, with cornea black but covered with red film. Base of antenna red and brown; acicle orange and flagellum tan.