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This article does not cite any references or sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (December 2009) |
| Palaeacanthocephala | |
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| Proboscis of a Rhadinorhynchus species | |
| Scientific classification | |
| Kingdom: | Animalia |
| Subkingdom: | Eumetazoa |
| (unranked): | Bilateria |
| Superphylum: | Platyzoa |
| Phylum: | Acanthocephala |
| Class: | Palaeacanthocephala A.Meyer, 1931 |
| Orders | |
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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