Maggenti, Armand R. Division of Nematology, University of California, Davis, California.
- External covering
- Alimentary canal
- Somatic musculature
- Nervous system
- Excretory system
- Reproductive system
- Life cycle
- Additional Readings
A group of unsegmented worms that have been variously recognized as an order, class, and phylum. They are now widely accepted as a separate phylum, Nemata (or Nematoda). When treated as a class, they were assigned either to the phylum Aschelminthes or to the phylum Nemathelminthes. In Aschelminthes, they were ranked equally with Rotifera (Rotatoria), Gastrotricha, Kinorhyncha (Echinodera), and Nematomorpha (gordian or horsehair worms).
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