Astropecten is a genus of sea stars of the family Astropectinidae.
The Euryalida are an order of brittle stars, which includes large species with either branching arms or long and curling arms.
Gorgonocephalus is a genus of marine basket stars in the class Ophiuroidea. Members of this genus are found in coldwater environments including the Arctic, the Antarctic, and deep-sea habitats. The scientific name comes from the Greek, gorgós meaning "dreaded" and -cephalus meaning "head", and refers to the similarity between these echinoids and the Gorgon's head from Greek myth with its coiled serpents for hair.
Spatangus is a genus of heart urchins in the Spatangidae family. The genus is synonymous with the previously recognised genera Prospatangus Lambert, 1902 and Spatagus. There are nine recognised species. The type species is Spatangus purpureus Müller, 1776 by subsequent designation.
Luidia is a genus of starfish in the family Luidiidae in which it is the only genus. Species of the family have a cosmopolitan distribution.
Clypeaster, common name "cake urchins" or "sea biscuits", is a genus of echinoderms belonging to the family Clypeasteridae.
Ophiactis is a genus of brittle stars (Ophiuroidea).
Goniocidaris is a genus of sea urchins (Echinoidea) in the family Cidaridae and typical of the subfamily Goniocidarinae. Extant species are mostly found in Indo-Pacific seas, often living at depth.
Caenopedina is a genus of sea urchins of the family Pedinidae.
Aspidodiadema is a genus of echinoderms belonging to the family Aspidodiadematidae. The species of this genus are found in the Indo-Pacific and Caribbean.
Brissus is a genus of echinoderms belonging to the family Brissidae.
Stylocidaris is a genus of echinoderms belonging to the family Cidaridae.
Asteroporpa is a genus of echinoderms belonging to the family Gorgonocephalidae.
Euryalidae is a family of echinoderms belonging to the order Euryalida.
Brisaster is a genus of echinoderms belonging to the family Schizasteridae.
Heterobrissus is a genus of echinoderms belonging to the order Spatangoida, family unknown.
Stereocidaris is a genus of echinoderm belonging to the family Cidaridae.
Echinolampas is a genus of echinoderms belonging to the family Echinolampadidae.
Ophionereis is a genus of echinoderms belonging to the family Ophionereididae.
Asteronyx is a genus of echinoderms belonging to the family Asteronychidae.
