Assertion: headed worm | /r/HasProperty | phylum acanthocephala
Facets:
Source sentences:
text: Because of certain similarities in structure, the roundworms are sometimes placed together with the horsehair worms (phylum Nematomorpha) and spiny-headed worms (phylum Acanthocephala) and various other worms in a single phylum, Aschelminthes (see below).