Echinocardium is a genus of sea urchins of the family Loveniidae, known as heart urchins. The name is derived from the Greek ἐχῖνος and καρδία.
Arachnoides is a genus of sea urchin within the family Clypeasteridae, found in the Indo-Pacific oceans. The base is flat and the upper surface is convex.
Cerion is a genus of small to medium-sized tropical air-breathing land snails, terrestrial pulmonate gastropods in the family Cerionidae, noted for its extreme morphological diversity. The genus is endemic to the Caribbean region.
Conulus is an extinct genus of echinoids that lived in the Cretaceous. Remains of Conulus species have been found in Asia, Europe, and North America.
Micraster is an extinct genus of echinoids from the Late Cretaceous to the early Eocene. Its remains have been found in Africa, Antarctica, Europe, and North America. Micraster was an infaunal echinoid living in a burrow below the sediment surface. The test is clearly bilateral and there is a deep anterior groove to take in water containing organic particles to the mouth. The tube feet keep a supply of nutrient-laden water moving into the burrow. The anus has a waste tube behind it.
Clypeaster, common name "cake urchins" or "sea biscuits", is a genus of echinoderms belonging to the family Clypeasteridae.
Conoclypus - from the Greek words Konos + clypus - is a genus of sea urchins belonging to the family Conoclypeidae.
Hemipneustes is an extinct genus of sea urchins belonging to the family Holasteridae.
Schizaster is a genus of heart urchins belonging to the family Schizasteridae. The type species of the genus is Schizaster studeri.
Amblypneustes is a genus of sea urchins, belonging to the family Temnopleuridae.
Parechinus angulosus, the Cape urchin, is a sea urchin in the family Parechinidae endemic to southern Africa. It is the only species in the genus Parechinus.
Schizasteridae is a family of echinoderms belonging to the order Spatangoida.
Brissus is a genus of echinoderms belonging to the family Brissidae.
Echinocyamus is a genus of echinoderms belonging to the family Fibulariidae.
Cassidulus is a genus of echinoderms belonging to the family Cassidulidae.
Metalia is a genus of echinoderms belonging to the family Brissidae.
Echinolampas is a genus of echinoderms belonging to the family Echinolampadidae.
Echinodiscus is the scientific name of several genera of organisms and may refer to:
Echinodiscus is a genus of sand dollars within the family Astriclypeidae. There are currently 14 species assigned to the genus, with a majority being extinct.
