Echinoidea: Order Cidaroida (Primitive Sea Urchins)

Family: Cidaridae

Genus and Selected SpeciesImage
Acanthocidaris maculicollis
Austrocidaris canaliculata
Calocidaris micans
Centrocidaris doederleini
Chondrocidaris gigantea
Chorocidaris fusispina
Cidaris cidaris
Compsocidaris pyrsacantha
Eucidaris tribuloides
Goniocidaris mbraculum
Hesperocidaris asteriscus
Kionocidaris striata
Lissocidaris xanthe
Ogmocidaris benhami
Phalacrocidaris japonica
Phyllacanthus mperialis
Plococidaris verticillata
Prionocidaris baculosa
Psilocidaris echinulata
Rhopalocidaris rosea
Schizocidaris assimilis
Stereocidaris granularis
Stylocidaris affinis
Tretocidaris bartletti

Family: Ctenocidaridae

Genus and Selected SpeciesImage
Aporocidaris milleri
Ctenocidaris speciosa
Homalocidaris gigantea
Notocidaris hastata
Rhynchocidaris triplopora

Family: Histocidaridae

Genus and Selected SpeciesImage
Histocidaris elegans

Family: Psychocidaridae

Genus and Selected SpeciesImage
Psychocidaris ohshimai

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