Chaetognatha
plural noun
Chae·tog·na·tha
| \ kēˈtägnəthə\
Definition of Chaetognatha
: a phylum of small, slender marine animals comprising the arrow worms
But the absence of a definite synapomorphy between Chaetognatha and any other metazoan taxon except Bilateria itself has cast the arrowworms into an enduring isolation.— Edward E. Ruppert et al., Invertebrate Zoology: A Functional Evolutionary Approach, 2004
— see also sagitta, spadella
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