Sipuncula

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Noun1.Sipuncula - peanut worms
animal kingdom, Animalia, kingdom Animalia - taxonomic kingdom comprising all living or extinct animals
peanut worm, sipunculid - small unsegmented marine worm that when disturbed retracts its anterior portion into the body giving the appearance of a peanut
phylum - (biology) the major taxonomic group of animals and plants; contains classes
References in periodicals archive ?
Available evidence across various aquatic phyla, including annelids, sipunculids, molluscs (bivalves and gastropods), crustaceans, and fish, supports the view that impaired oxygen supply capacity in aquatic ectotherms is the primary thermal limitation at low and high temperatures (Portner 2002, Portner et al.
2011), sipunculids (Reipschlager and Portner, 1996), mussels (Michaelidis et ai, 2005), crabs (Carter et al.
macronemus feed over sand like other mullid fishes, thrusting the pair of sensory barbels on the chin into sand to reveal the usual prey of small crustaceans, polychaetes, and sipunculids.
In the stomachs of both species, crustaceans and teleosts were the dominant prey items, and molluscs, polychaetes, echinoderms, and sipunculids were found in lower abundance.
Chondrites could have been produced by polychaetes, sipunculids or even arthropods (Osgood, 1975; Savrda, 1992), although traditionally this ichnogenus is interpreted as made by sessile vermiform organisms that explored the surrounding substrate with a retractile proboscis-type organ or another tubular appendage (Simpson, 1957; Shourd and Levin, 1976).
Kyukichi Kishida (1888-1968) was a Japanese zoologist who studied morphology and systematics of various groups of animals including spiders, mites, pseudoscorpions and other arachnids, myriapods and insects, as well as sipunculids, birds and mammals.