Ascaridida
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The order Ascaridida includes several families of parasitic roundworms with three "lips" on the anterior end.
Important families include:
- Ascarididae, which includes the giant intestinal roundworm and related species.
- Toxocaridae, which includes parasites of canids, felids, and raccoons, but which can unsuccessfully parasitize humans and cause visceral larval migrans.
- Anisakidae, also called the marine mammal Ascarids. The larvae of these worms cause anisakiasis when ingested by humans, but do not reproduce except in marine mammals.
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