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Echinoida is an
order Order, ORDER or Orders may refer to: * A socio-political or established or existing order, e.g. World order, Ancien Regime, Pax Britannica * Categorization, the process in which ideas and objects are recognized, differentiated, and understood ...
of sea urchins in the
class Class, Classes, or The Class may refer to: Common uses not otherwise categorized * Class (biology), a taxonomic rank * Class (knowledge representation), a collection of individuals or objects * Class (philosophy), an analytical concept used d ...
Echinoidea Sea urchins or urchins () are echinoderms in the 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 covered by a spiny ...
. They are distinguished from other sea urchins by simultaneously possessing both an un-sculpted test and a feeding lantern with large plates fused across the top of each pyramid.


Taxonomy

Order Echinoida * family
Echinidae Echinidae is a family of sea urchins in the order Camarodonta. Members of the family are found in the Atlantic Ocean and the Antarctic.Echinometridae The Echinometridae are a Family (biology), family of sea urchins in the class (biology), class Echinoidea. Characteristics All Echinometridae have imperforate tubercles and compound ambulacral plates.Parasaleniidae Parasaleniidae is a family of echinoderms belonging to the order Camarodonta The Camarodonta are an Order (biology), order of globular sea urchins in the class (biology), class Echinoidea. The fossil record shows that camarodonts have been in ...
* family
Strongylocentrotidae The Strongylocentrotidae are a family (biology), family of sea urchins in the order (biology), order Camarodonta. Genera References

Strongylocentrotidae, Echinoderm families {{echinoidea-stub ...
Gregory, 1900 Image:Paracentrotus lividus profil.JPG, ''
Paracentrotus lividus ''Paracentrotus lividus'' is a species of sea urchin in the family Parechinidae commonly known as the purple sea urchin. It is the type species of the genus and occurs in the Mediterranean Sea and eastern Atlantic Ocean. Description ''Paracentr ...
'' (
Echinidae Echinidae is a family of sea urchins in the order Camarodonta. Members of the family are found in the Atlantic Ocean and the Antarctic.Echinometra lucunter'' (
Echinometridae The Echinometridae are a Family (biology), family of sea urchins in the class (biology), class Echinoidea. Characteristics All Echinometridae have imperforate tubercles and compound ambulacral plates.Strongylocentrotus franciscanus'' (
Strongylocentrotidae The Strongylocentrotidae are a family (biology), family of sea urchins in the order (biology), order Camarodonta. Genera References

Strongylocentrotidae, Echinoderm families {{echinoidea-stub ...
)


See also

*'' Colobocentrotus atratus'' - Shingle urchin *'' Echinus acutus'' - White sea urchin *''
Echinus esculentus ''Echinus esculentus'', the European edible sea urchin or common sea urchin, is a species of marine invertebrate in the Echinidae family. It is found in coastal areas of western Europe down to a depth of . It is considered "Near threatened" in th ...
'' - Common sea urchin *'' Echinus tylodes'' *''
Evechinus chloroticus ''Evechinus chloroticus'', or kina, is a sea urchin endemic to New Zealand. This echinoderm belongs to the family Echinometridae and it can reach a maximum diameter of 16–17 cm. Kina populations throughout New Zealand have dramatically ...
'' - New Zealand sea urchin *''
Heterocentrotus mammillatus ''Heterocentrotus mamillatus'', commonly known as the slate pencil urchin, red slate pencil urchin, or red pencil urchin, is a species of tropical sea urchin from the Indo-Pacific region. Description This species is a large sea urchin, capp ...
'' - Red pencil urchin *'' Heterocentrotus trigonarius'' - Slate pencil urchin *'' Loxechinus albus'' - Chilean sea urchin


References

* * Extant Late Cretaceous first appearances Obsolete animal taxa {{echinoidea-stub