- Acanthocephala (Thorny-headed Worms) - Images and brief description.
www.biosci.ohio-state.edu/~parasite/acanthocephala.html
- Phylum Acanthocephala - Outline of the biology of Acanthocephala, including their features, reproduction and life cycle, ecology, and classification.
www.rtis.com/nat/user/elsberry/taxa/acanth.htm
- Phylum Acanthocephala - Description of this phylum of parasitic invertebrate animals.
www.teaching-biomed.man.ac.uk/bs1999/bs146/biodiversity/acantho.htm
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