Palaeacanthocephala

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Palaeacanthocephala
Acanthocephala Rhadinorhynchus 2.jpg
Proboscis of a Rhadinorhynchus species
Scientific classification
Kingdom: Animalia
Phylum: Acanthocephala
Class: Palaeacanthocephala
A.Meyer, 1931
Orders

Echinorhynchida
Polymorphida

Two paleoacanthocephalans, Heterosentis mongcai Amin, Heckmann & Ha, 2014 and Filisoma indicum Van Cleave, 1928

Palaeacanthocephala ("ancient thornheads") is a class within the phylum Acanthocephala. The adults of these parasitic platyzoans feed mainly on fish, aquatic birds and mammals.

The nuclei of the hypodermis (outer layer of skin) are fragmented and the males have two to seven cement glands, unlike their relatives the Archiacanthocephala which always have eight.

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