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Noun1.Holothuroidea - class of echinoderms including the sea cucumbers
Echinodermata, phylum Echinodermata - radially symmetrical marine invertebrates including e.g. starfish and sea urchins and sea cucumbers
holothurian, sea cucumber - echinoderm having a flexible sausage-shaped body, tentacles surrounding the mouth and tube feet; free-living mud feeders
family Holothuridae, Holothuridae - a family of Holothuroidea
class - (biology) a taxonomic group containing one or more orders
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References in periodicals archive ?
Biometry, bathymetric distribution, and reproductive cycle of the holothuroid Holothuria tubulosa (Echinodermata) from the Mediterranean seagrass beds.
It is well known that holothuroid tissues contain a high quantity of saponins (Nigrelli, 1952; Van Dyck et al, 2009, 2010), secondary metabolites that act as a predator deterrent.
Holothuroid sea cucumbers provide vital (and often overlooked) ecological services in the habitats they occupy.
Biochemical and energetic composition of bathyal achinoids and an asteroid, holothuroid and crinoid from the Bahamas.
[VO.sub.2] ([micro]l/g/h) of three mechanical states of catch Connective tissues [double dagger] Standard Stiff Soft Echinoid C A 2.84 [+ or 4.18 [+ or [paragraph] -] 1.08 -] 2.04 (10) (10) * 3.26 [+ or 7.35 [+ or -] 1.36 -] 3.31 (22) (22) ** Holothuroid 1.41 [+ or 2.21 [+ or 12.52 [+ or dermis -] 0.60 -] 0.80 -] 4.47 (24) (12) (12) [double [double [double dagger] dagger] dagger] Asteroid 0.56 [+ or 0.78 [+ or dermis -] 0.12 -] 0.19 (11) (11) [section] [section] Asteroid 12.44 [+ 29.30 [+ muscle# or -] or -] 5.54 (1O) 17.09 [section] (10) [section] [dagger] Values are the arithmetic means [+ or -] S.D.
Similarly, in the holothuroid Eupentacta fraudatrix, 20 psu marked the lower salinity limit for successful fertilization (Kashenko, 2000).
Similar results were reported for echinoid and holothuroid metamorphosis (Chia and Burke, 1978; Burke et al., 2006; Nakano et al., 2006; Katow et al., 2009).
The structures reported in this study have been seen only in holothuroid echinoderms.
It thus appears that a dipleurula-type larva with single ciliary band topology, as seen in the holothuroid auricularia and the hemichordate tornaria, is a basal feature of the Ambulacraria.
Evidence of matrotrophy in the viviparous holothuroid echinoderm Synaptula hydriformis.