Macroregonia

Macroregonia is a genus of crabs containing only a single species, Macroregonia macrochiera.^[1] It is found from the coast around Pacific Ocean at depths of 900–3,000 m (3,000–9,800 ft).^[2]

Macroregonia
Macroregonia macrochiera collected on Patton Seamount
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Malacostraca
Order:	Decapoda
Suborder:	Pleocyemata
Infraorder:	Brachyura
Family:	Oregoniidae
Genus:	Macroregonia Sakai, 1978
Species:	M. macrochira
Binomial name
Macroregonia macrochira Sakai, 1978

Description

Its carapace is ovate and anteriorly broadened, with two short rostral spines projecting forward. The surface of the carapace, chelipeds and walking legs are covered by numerous tubercles. The legs are elongated; its legspan reaches up to 80 cm (31 in).^[3] All pereiopods are cylindrical and sparsely setose; the merus of each walking leg bears a row of small spines along the extensor margin.^[4] It reaches up to 122 mm (4.8 in) in carapace length; it is the largest spider crab along Macrocheira kaempferi.^[5]