| 词条 | Polymorphida |
| 释义 | {{Taxobox | name = Polymorphida | image = C wegeneri.JPG | image_caption = Corynosoma wegeneri | regnum = Animalia | phylum = Acanthocephala | classis = Palaeacanthocephala | ordo = Polymorphida | ordo_authority = Petrochenko, 1956 | subdivision_ranks = Families | subdivision =Centrorhynchidae Plagiorhynchidae Polymorphidae }} Polymorphida are an order of thorny-headed worms (phylum Acanthocephala). The adults of these parasitic platyzoans feed mainly on fish and aquatic birds. {{wikispecies|Polymorphida}}{{Taxonbar|from=Q2544965}}{{acanthocephalan-stub}} 1 : Acanthocephalans |
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