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.
purpuratus in California, and increasingly frequently among other echinoid species, during the last several decades (Ward and Lafferty, 2004).
Nedelec & Verlaque 1984, Boudouresque & Verlaque 2001), the role of this seagrass on the distribution patterns of this echinoid nevertheless needs to be clearly defined, and P.
Demography of the echinoid Strongylocentrotus droebachiensis related to biotope in northern Norway.
The ecology of fertilization of echinoid eggs: the consequences of sperm dilution, adult aggregation, and synchronous spawning.
All echinoids deployed in the brine stream were completely disarticulated (Table 3) and many of the test ossicles were not present in the bag (Fig.
An echinoid fossil in the wall of <BBurberry's on Bond Street
These included the common echinoid Clypeaster cotteaui and two species of scallops assigned to the genus Chlamys, including the common C.
The Paleogene (approximately 60 million year old) shallow carbonates atop four of the seamounts along the Emperor Chain in the North Pacific Basin are rich in skeletal debris of bryozoans, echinoids, mollusks, and red algae with pervasive red algal encrustations and only rare coral.
Coralline algae, oysters and echinoids - a liaison in rhodolith formation from the Burdigalian of the Latium-Abruzzi Platform (Italy) (M.
In some locations, echinoids (Echinodermata), larger bivalves, burrowing sea anemones (Cnidaria), and sea cucumbers (Echinodermata) were important community components.