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Noun

phylum Chaetognatha - arrowworms: a group of small active transparent marine worms

animal kingdom, Animalia, kingdom Animalia - taxonomic kingdom comprising all living or extinct animals

arrowworm, chaetognath - any worm of the Chaetognatha; transparent marine worm with horizontal lateral and caudal fins and a row of movable curved spines at each side of the mouth

genus Sagitta - chief genus of Chaetognatha including the largest arrowworms

genus Spadella - marine worms resembling the sagittas but with a broader body and only one pair of lateral fins

phylum - (biology) the major taxonomic group of animals and plants; contains classes

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References in periodicals archive

The importance of bioluminescence in the ocean is underscored by the fact that almost all marine animal phyla have members that possess the ability to produce light (Shimomura, 2006; Haddock et al., 2010), and the marine phylum Chaetognatha is no exception.

Bioluminescent organs of two deep-sea arrow worms, Eukrohnia fowleri and Caecosagitta macrocephala, with further observations on bioluminescence in chaetognaths

Na-channel-based excitability in invertebrate muscle fibers was previously reported to exist only in the phylum Chaetognatha (comprising the "arrow worms", ref.

All-or-none contraction and sodium channels in a subset circular muscle fibers of squid mantle

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