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Polymorphida
Corynosoma wegeneri
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Acanthocephala
Class:	Palaeacanthocephala
Order:	Polymorphida Petrochenko, 1956

Polymorphida are an order of thorny-headed worms (phylum Acanthocephala). The adults of these parasitic platyzoans feed mainly on fish and aquatic birds.

This order contains 5 families:

• Centrorhynchidae Van Cleave, 1916
• Isthomosacanthidae Smales, 2012
• Plagiorhynchidae Meyer, 1931
• Pyriprobosicidae
• Polymorphidae Meyer, 1931

References

1. "ITIS - Report: Polymorphida".
2. Huston, D. C., Cribb, T. H., & Smales, L. R. (2020). Molecular characterisation of acanthocephalans from Australian marine teleosts: proposal of a new family, synonymy of another and transfer of taxa between orders. Systematic Parasitology, 1-23.

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