General: Compare to Pilematechinus, which has much shorter spines, and a periproct that is much more above the margin.
Ocean range (global): Axial region of the Juan de Fuca Ridge. Previously this species was only known only from the type material collected by the Albatross in the Gulf of California in the late 1800's.
Habitat description: Benthic.
Consulting taxonomist: Richard Mooi, California Academy of Sciences, San Francisco, California.
ReferencesEncyclopedia of Life
Tree of Life
World Register of Marine Species
National Center for Biotechnology Information
Citation: Cystechinus giganteus (A. Agassiz, 1898) Deep-Sea Guide (DSG) at http://dsg/mbari.org/dsg/view/concept/Cystechinus%20giganteus. Monterey Bay Aquarium Research Institute (MBARI). Consulted on 2018-07-18.