Palaeacanthocephala

Palaeacanthocephala

Taxobox
name = Palaeacanthocephala


image_width = 240px
image_caption = Proboscis of a "Rhadinorhynchus" species
regnum = Animalia
subregnum = Eumetazoa
unranked_phylum = Bilateria
superphylum = Platyzoa

phylum = Acanthocephala
classis = Palaeacanthocephala
classis_authority = A.Meyer, 1931
subdivision_ranks = Orders
subdivision =
Echinorhynchida
Polymorphida

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 hyperdermis {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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