Cidaridae

Cidaridae is a family of sea urchins in the order Cidaroida.

Cidaris is a genus of pencil sea urchins.

Stylocidaris is a genus of echinoderms belonging to the family Cidaridae.

Eucidaris is a genus of cidaroid sea urchins known as slate pencil urchins (named after slate pencil). They are characterised by a moderately thick test, a usually monocyclic apical disc, perforate and non-crenulate tubercles and nearly straight ambulacra with horizontal pore pairs. The primary spines are few and widely spaced, stout with blunt flat tips and beaded ornamentation and the secondary spines are short and apressed. They originated in the Miocene and extant members of the genus are found in the tropical Indo-Pacific Ocean, East Pacific, Atlantic Ocean and Caribbean Sea.

species of echinoderm

Prionocidaris is a genus of echinoderms belonging to the family Cidaridae.

species of echinoderm

species of echinoderm

species of echinoderm

species of echinoderm

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.

Stereocidaris is a genus of echinoderm belonging to the family Cidaridae.

species of echinoderm

Acanthocidaris is a genus of echinoderms belonging to the family Cidaridae.

Chondrocidaris is a genus of sea urchins of the family Cidaridae described in 1863 by Alexander Agassiz. There are two living species and several fossil species dating as far back as the Miocene.

species of echinoderm

Phyllacanthus is a genus of echinoderms belonging to the family Cidaridae.

species of echinoderm

species of echinoderm

species of echinoderm

species of echinoderm

species of echinoderm

Austrocidaris is a genus of sea urchins belonging to the family Cidaridae.

species of echinoderm

species of echinoderm

species of echinoderm