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A member of the phylum Echinodermata.


any member of the phylum Echinodermata, including the sea urchins, starfish, brittle-stars, sea cucumbers, feather stars and sea lillies. The phylum is characterized by a pentaradiate structure (a five-sided RADIAL SYMMETRY) and the presence of tube feet in most forms.
References in periodicals archive ?
Well-diversified trilobites, brachiopods, gastropods, echinoderms, phyllocarids, ostracods, bivalves, agnostids, hyoliths, cephalopods and conulariids, associated with graptolites and ichnofossils, have been studied for more than 150 years (see Barrande 1872; Havlicek & Vanek 1966, 1990; Mikulas 1991; Mergl 2002; Chlupac 2003; Kraft & Kraft 2003; Budil et al.
Echinoderms, like sea urchins, starfish, brittle-stars and sea cucumbers are locally significant as a food source, but globally make up only a small percentage of the overall catch.
1993; EPA 2002), and then sorted to the major groups: Annelids, Echinoderms, Mollusks, Crustaceans, and others.
The similarity of mean forward progression velocity for oyster and echinoderm sperm is not unexpected given similarities in size and the viscous environment encountered in both situations.
Shelly fossils such as trilobites and brachiopods, echinoderms and bryozoans are generally abundant.
Critical tissue copper residues for marine bivalve (Mytilus galloprovincialis) and echinoderm (Strongylocentrotus purpuratus) embryonic development: conceptual, regulatory and environmental implications.
20 Negative (7) WT 25 Negative (15) WT 33 Negative (17) WT 34 Negative (15) WT 44 Negative (11) WT Abbreviations: ALK, anaplastic lymphoma kinase; Avg, average; EGFR, epidermal growth factor receptor; EML4, echinoderm microtubule-associated proteinlike 4 gene; WT, wild type.
On coral reefs, for example, echinoderms are main components in the food chain at various trophic levels and play an important role through grazing, predation, or bioturbation (Birkeland, 1989).
The team collected a rare, as-yet unnamed brittle sea star currently under review by the Museum's nationally recognized Echinoderm Department.
Lebrato and his colleagues collected echinoderm samples from both deep sea and shallower waters at multiple latitudes in the Atlantic Ocean.
One of the most diverse echinoderm collections in the world, the 3,000-square-foot Sea Star Quest exhibit will showcase more than 30 species, including nearly 100 animals, in 20 different habitats.
The diversity of echinoderms is low compared to the Indo-West Pacific, where 50 species of echinoderm symbionts are known (Bruce 1982).

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