[2][3] The species is named after Ilya Gavrilovich Voznesenski.

[4] It is found at depths of 6–73 metres (20–240 ft) in the north-east Pacific Ocean from Kodiak, Alaska to Crescent City, California.

[5][6] R. wosnessenskii grows to 7 centimetres (2.8 in) across the carapace, which is triangular and has a deep semicircular depression.

The legs are covered in spines and long setae.

It lives in crevices on rocky or gravel bottoms, and is only rarely encountered.