Polymorphida

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Polymorphida
Scientific classification
Kingdom: Animalia
Subkingdom: Eumetazoa
(unranked) Bilateria
Superphylum: Platyzoa
Phylum: Acanthocephala
Class: Palaeacanthocephala
Order: Polymorphida
Petrochenko, 1956
Families

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.

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