Echinoidea

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Echinoidea

[‚ek·ə′noid·e·ə]
(invertebrate zoology)
The sea urchins, a class of Echinozoa having a compact body enclosed in a hard shell, or test, formed by regularly arranged plates which bear movable spines.
References in periodicals archive ?
There are poorly preserved fragments of sand dollar echinoids collected from this area in the Rio Bravo Collection (Molineux 2008) at the Texas Natural Science Center.
Bekhmeia wetzeli, Sponge spicules, Mollusca fragments, Gastropoda, Echinoid remains Due to assemblage of microfossils above, using biozonation of Gollesstaneh [10] "Orbitolina-Choffattella-Salpingoporella dinarica zone I" biozone was suggested.
The echinoid immune system and the phylogenetic occurrence of immune mechanisms in deuterostomes.
Reproductive cycles in Oregon populations of the echinoid, Strongylocentrotus purpuratus (Stimpson).
How prey size, type and abundance affects foraging decisions by the regular echinoid Psammechinus miliaris.
Progesterone metabolism in the ovaries and testes of the echinoid Lytechinus variegatus Lamarck (Echinodermata).
The regular echinoid Paracentrotus lividus (Lamarck, 1816) is a macroalgivore sea urchin commonly found along the North Atlantic coasts from Ireland to southern Morocco and throughout the Mediterranean Sea (Bayed et al.
Other studies proved the possibility of producing a large number of eggs and larvae of several echinoid species.