Cidaroida

Cidaroida

[‚sid·ə′rȯi·də]
(invertebrate zoology)
An order of echinoderms in the subclass Perischoechinoidea in which the ambulacra comprise two columns of simple plates.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Larval form and metamorphosis of a "primitive" sea urchin, Eucidaris thouarsi (Echinodermata, Echinoidea, Cidaroida), with implications for developmental and phylogenetic studies.
Subclass Cidaroidea Order Cidaroida Family Cidaridae Genus Prionocidaris AGASSIZ, 1863 Prionocidaris sismondai (MAYER) P1.6, fig.3 1907-8 Prionocidaris sismondai MAYER, v.34, p.142
Two families, the Schizasteridae (Spatangoida) and the Cidaridae (Cidaroida), consist almost entirely of brooding species.
Larval form and metamorphosis of a "primitive" sea urchin, Eucidaris thouarsi (Echinodermata: Echinoidea: Cidaroida), with implications for developmental and phylogenetic studies.
Orden Cidaroida Claus, 1880 Familia Cidariidae Gray, 1825 Genero Eucidaris Pomel, 1883 Eucidaris thouarsii (valenciennes, 1846) Orden Diadematoida Duncan, 1889 Familia Diadematidae Gray, 1855 Genero Diadema Gray, 1825 Diadema mexicanum (A.
The orders Cidaroida and Temnopleuroida (each distinct clades) contain the great majority of regular echinoid species known or inferred to have pelagic, nonfeeding larvae (40 of 51 species) and the Cidaroids contained 13 of the 15 known brooding species.
Extant echinoids are divided into two major sister clades, the Cidaroida and the Euechinoida.
Eucidaris thouarsi (Echinodermata; Echinoidea: Cidaroida), with implications for developmental and phylogenetic studies.
Larval form and metamorphosis of a 'primitive' sea urchin, Eucidaris thouarsi (Echinodermata: Echinoidea: Cidaroida), with implications for developmental and phylogcnetic studies.
The pencil urchins (order Cidaroida) were represented in our study by Eucidaris tribuloides, collected on the Atlantic coast of Panama; the order Diadematoida by Diadema antillarum, also from the Atlantic coast of Panama.
Of these, eight involve brood-protection (Cidaroida, Temnopleuroida, Echinoida, Spatangoida [including Schizasteridae and Brissidae], Holasteroida, Cassiduloida, Clypeasteroida).