sipunculid


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sipunculid

(saɪˈpʌŋkjʊlɪd)
n
(Animals) an unsegmented marine worm of the group Sipunculoidea
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.sipunculid - small unsegmented marine worm that when disturbed retracts its anterior portion into the body giving the appearance of a peanut
invertebrate - any animal lacking a backbone or notochord; the term is not used as a scientific classification
phylum Sipuncula, Sipuncula - peanut worms
References in periodicals archive ?
In marine invertebrates, such as annelid worms, sipunculid worms, and molluscs, the presence of an AOX has been described; nevertheless, to date there are no reports of this enzyme in crustaceans (McDonald et al.
1967b): Report on the sipunculid worms from the sublittoral zone of Cuba and the Gulf of Mexico.
and the sipunculid Aspidosiphon gosnoldi were quite abundant in stations of Group III, the first species in those stations situated at the north mouth of the channel (13, 14 and 15), and the second species at station 9 in summer (84 individuals) and winter (100 individuals).
In the autumn, both adults and juveniles relied more on crustaceans, with also a marked increase in the presence of sipunculid worms.
The remaining 9% comprised crustaceans, echino-derms, tunicates, and a sipunculid (see Appendix).
In the first, a specialist on sipunculid worms was asked for copies of his publications by an Alaskan cod fisherman.
2002), the test larva of neomen-ioid aplacophorans (Thompson, 1960: Okusu, 2002), and the pericalymma of the protobranch bivalve molluscs (Gustafson and Reid, 1986; Gustafson and Lutz, 1992; Zardus and Morse, 1998), as well as the unusual larva of the sipunculid Sipuncultts nuchts (Gerould.
The mitochondrial genome of the sipunculid Platscolopsis gouldii supports its association with Annelida rather than Mollusca.
The MBL's Supply Department provided the animals that he used in his comparison of marginal bands: the sipunculid and polychaete worms, lobsters and crabs, horseshoe crabs, some blood arcs, the skates, and of course the dogfish.
Biochemical changes during reproduction and starvation in the sipunculid worm Phascolosoma agassizii.
Coelomocytes from sipunculid worms have been shown to participate in immune responses such as phagocytosis and cytotoxicity against foreign agents (Boiledieu and Valembois, 1977; Blanco et al.
Test-like structures are also found among lecithotrophic larvae of non-molluscan spiralians: the "serosa" of the sipunculid Sipunculus nudus (Rice, 1988); the "endolarva" of the polychaete Phyllodoce mucosa (Cazaux, 1970) and other Phyllodocidae spp.