This beige to reddish beige species of sea star has rays with a radius of 45 mm (Jax Shells 2010
). It has been trawled from a depth of 550 m in the Gulf of Alaska during NOAA/NMFS trawl survey (Jax Shells 2010), but may be found at depths ranging from 0 to -1,848 meters.
Well developed marginal plates, the two series matching, covered with granules or spines. Small, crowded paxillae on the aboral surface. Usually a deep vertical channel (fasciole) between the marginals, serving as a ciliated food groove. Pointed tube feet with double ampullae. The anus can be well developed, small or absent.