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Cidaridae is a family of
According to the
Image:Eucidaris tribuloides (Slate-pencil Urchin).jpg, ''
The Echinoid Directory : Taxonomy; Natural History Museum, London
Description of the Cidaridae; Natural History Museum, London
* Hansson, H.G. (2001). Echinodermata, in: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50: pp. 336–351 {{Taxonbar, from=Q838992 Cisuralian first appearances Extant Permian first appearances Echinoderm families
sea urchin
Sea urchins () are spiny, globular echinoderms in the class Echinoidea. About 950 species of sea urchin live on the seabed of every ocean and inhabit every depth zone from the intertidal seashore down to . The spherical, hard shells (tests) of ...
s in the order Cidaroida
Cidaroida is an order of primitive sea urchins, the only living order of the subclass Perischoechinoidea. All other orders of this subclass, which were even more primitive than the living forms, became extinct during the Mesozoic.
Description
...
.
Description and characteristics
Cidarid sea urchins are characterized by their stout skeleton : thetest
Test(s), testing, or TEST may refer to:
* Test (assessment), an educational assessment intended to measure the respondents' knowledge or other abilities
Arts and entertainment
* ''Test'' (2013 film), an American film
* ''Test'' (2014 film), ...
is thick and hard, with massive perforated tubercles (never crenulated) surrounded by a crown of secondary tubercles, but no primary tubercles in the interambulacra regions. These tubercles hold massive spines, thick, strong and often very long, and showing sometimes odd shapes (thorny spines, fans, clubs, Christmas trees...).
The order Cidaroida
Cidaroida is an order of primitive sea urchins, the only living order of the subclass Perischoechinoidea. All other orders of this subclass, which were even more primitive than the living forms, became extinct during the Mesozoic.
Description
...
is the basalmost of current sea urchins, and most of the species included in this family are abyssal, even if a handful of species remain quite common in tropical shallow waters, like ''Eucidaris
''Eucidaris'' is a genus of cidaroid sea urchins known as slate pencil urchins. They are characterised by a moderately thick test, a usually monocyclic apical disc, perforate and non-crenulate tubercles and nearly straight ambulacra with horizon ...
'' or ''Phyllacanthus
''Phyllacanthus'' is a genus of echinoderms belonging to 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 ...
''.
Genera
According to the World Register of Marine Species
The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive list of names of marine organisms.
Content
The content of the registry is edited and maintained by scientific specialist ...
(WoRMS), the following genera are included in this family
* Subfamily '' Cidarinae'' (Mortensen, 1928a)
** Genus ''Calocidaris
''Calocidaris'' is a genus of echinoderms belonging to the family Cidaridae.
The species of this genus are found in Central America.
Species:
*''Calocidaris micans
''Calocidaris micans'' is a species of sea urchins of the family Cidaridae. ...
'' (H.L. Clark, 1907)
** Genus '' Centrocidaris'' (A. Agassiz, 1904)
** Genus '' Chondrocidaris'' (A. Agassiz, 1863)
** Genus '' Chorocidaris'' (Ikeda, 1941)
** Genus ''Cidaris
''Cidaris'' is a genus of pencil sea urchins.
Species
According to the World Register of Marine Species (WoRMS), the genus Cidaris contains the following extant species
*'' Cidaris abyssicola'' ( Agassiz, 1869)
*'' Cidaris annulata'' (Gray, ...
'' (Leske, 1778)
** Genus '' Compsocidaris'' (Ikeda, 1939)
** Genus ''Eucidaris
''Eucidaris'' is a genus of cidaroid sea urchins known as slate pencil urchins. They are characterised by a moderately thick test, a usually monocyclic apical disc, perforate and non-crenulate tubercles and nearly straight ambulacra with horizon ...
'' (Pomel, 1883)
** Genus '' Hesperocidaris'' (Mortensen, 1928b)
** Genus '' Kionocidaris'' (Mortensen, 1932)
** Genus '' Lissocidaris'' (Mortensen, 1939)
** Genus '' Tretocidaris'' (Mortensen, 1903b)
* Subfamily '' Goniocidarinae'' (Mortensen, 1928a)
** Genus '' Austrocidaris'' (H.L. Clark, 1907)
** Genus '' Goniocidaris'' (Desor, in Agassiz & Desor, 1846)
** Genus '' Ogmocidaris'' (Mortensen, 1921)
** Genus '' Psilocidaris'' (Mortensen, 1927)
** Genus '' Rhopalocidaris'' (Mortensen, 1927)
** Genus '' Schizocidaris'' (Mortensen, 1903b)
** Genus '' Adelcidaris'' (Cotton & Godfrey, 1942) (''nomen dubium'')
* Tribe '' Phyllacanthina'' (Smith & Wright, 1989)
** Genus ''Phyllacanthus
''Phyllacanthus'' is a genus of echinoderms belonging to 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 ...
'' (Brandt, 1835)
* Sub-family '' Stereocidarinae'' (Lambert, 1900)
** Genus '' Phalacrocidaris'' (Lambert, 1902)
** Genus '' Stereocidaris'' (Pomel, 1883)
* Subfamily '' Stylocidarinae'' (Mortensen, 1903)
** Genus '' Acanthocidaris'' (Mortensen, 1903b)
** Genus '' Plococidaris'' (Mortensen, 1909)
** Genus '' Prionocidaris'' (A. Agassiz, 1863)
** Genus '' Stylocidaris'' (Mortensen, 1909)
A now abandoned genus, ''Cidarites'' was used in the late 18th and early 19th century to describe a number of species of both cidarid and echid sea urchins.
Eucidaris tribuloides
''Eucidaris tribuloides'', the slate pencil urchin, is a species of cidaroid sea urchins that inhabits littoral regions of the Atlantic Ocean. As a member of the basal clade, basal echinoid order Cidaroida, its morphological, developmental and ...
''.
Image:Phyllacanthus.jpg, ''Phyllacanthus imperialis
''Phyllacanthus imperialis'', also known as the Sputnik urchin, imperial lance urchin, imperial sea urchin, imperial urchin, pencil sea urchin, lance urchin, knobby sputnik sea urchin, mine urchin, and land mine sea urchin, is a species of sea u ...
''
Image:Plococidaris verticillata.jpg, '' Plococidaris verticillata''
Image:Prionocidaris baculosa.jpg, '' Prionocidaris baculosa'', from Philippines
Image:Reef0228.jpg, '' Chondrocidaris gigantea'', from Hawaii
Image:Stylocidaris affinis.jpg, ''Stylocidaris affinis
''Stylocidaris affinis'', also known as pencil urchin or red lance urchin, is a species of sea urchin.
It can be found in Bermuda, Caribbean Sea, Gulf Of Mexico, and the Mediterranean Sea. It occurs on circalittoral and deep sedimentary bottoms ...
''
Image:Cidaroid urchin in Galapagos.jpg, '' Eucidaris galapagensis''
Image:Cidaris blakei.jpg, ''Cidaris blakei
''Cidaris blakei'' is a species of sea urchins of the family Cidaridae. Its armour is covered with spines of three types, one unique type being extended and fan-like, making it easily recognized. Alexander Agassiz first described it scientificall ...
''
Image:Goniocidaris umbraculum (USNM E11208) 002.jpeg, '' Goniocidaris umbraculum''
References
The Echinoid Directory : Taxonomy; Natural History Museum, London
Description of the Cidaridae; Natural History Museum, London
* Hansson, H.G. (2001). Echinodermata, in: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50: pp. 336–351 {{Taxonbar, from=Q838992 Cisuralian first appearances Extant Permian first appearances Echinoderm families