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''Chondrocidaris'' is a
genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...
of
sea urchin Sea urchins or urchins () are echinoderms in the class (biology), class Echinoidea. About 950 species live on the seabed, inhabiting all oceans and depth zones from the intertidal zone to deep seas of . They typically have a globular body cove ...
s of the family
Cidaridae Cidaridae is a family of sea urchins in the order Cidaroida. Description and characteristics Cidarid sea urchins are characterized by their stout skeleton : the test is thick and hard, with massive perforated tubercles (never crenulated) su ...
described in 1863 by
Alexander Agassiz Alexander Emmanuel Rodolphe Agassiz (December 17, 1835March 27, 1910), son of Louis Agassiz and stepson of Elizabeth Cabot Agassiz, was an American scientist and engineer. Biography Agassiz was born in Neuchâtel, Switzerland, and immigrated t ...
. There are two living species and several fossil species dating as far back as the
Miocene The Miocene ( ) is the first epoch (geology), geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and mea ...
.Kroh, A. (2015)
''Chondrocidaris'' A. Agassiz, 1863
In: Kroh, A. & Mooi, R. (2015) World Echinoidea Database. Accessed through:
World Register of Marine Species The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive catalogue and list of names of marine organisms. Content The content of the registry is edited and maintained by scien ...
on 2015-04-05.
;Living species: *'' Chondrocidaris brevispina'' (
Clark Clark is an English language surname with historical links to England, Scotland, and Ireland, ultimately derived from the Latin ''clericus'' meaning "scribe", "secretary" or a scholar within a religious order, referring to someone who was educated ...
, 1925)
*'' Chondrocidaris gigantea'' (
Agassiz Jean Louis Rodolphe Agassiz ( ; ) FRS (For) FRSE (May 28, 1807 – December 14, 1873) was a Swiss-born American biologist and geologist who is recognized as a scholar of Earth's natural history. Spending his early life in Switzerland, he recei ...
, 1863)
Image:Chondrocidaris brevispina.jpg, '' Chondrocidaris brevispina'' Image:Reef0228.jpg, '' Chondrocidaris gigantea'' ;Extinct species: *'' Chondrocidaris clarkii'' *'' Chondrocidaris marianica'' *'' Chondrocidaris problepteryx''


References


External links

* Cidaridae Cidaroida genera Taxa described in 1863 Taxa named by Alexander Agassiz {{echinoidea-stub