''Parascaris'' is a genus of

nematodes The nematodes ( or grc-gre, Νηματώδη; la, Nematoda) or roundworms constitute the phylum Nematoda (also called Nemathelminthes), with plant-parasitic nematodes also known as eelworms. They are a diverse animal phylum inhabiting a broa ...

in the family

Ascarididae The Ascarididae are a family of the large intestinal roundworms. Members of the family are intestinal parasites, infecting all classes of vertebrates. It includes a number of genera,Anderson RC (2000)''Nematode Parasites of Vertebrates. Their Dev ...

. It contains two species, ''

Parascaris equorum ''Parascaris equorum'' is a species of ascarid that is the equine roundworm. Amongst horse owners, the parasites are colloquially called "Ascarids". This is a host-specific helminth intestinal parasite that can infect horses, donkeys, and zeb ...

'' and '' Parascaris univalens'', which are morphologically identical, but can be distinguished by chromosome number. Both species parasitize horses.

References

Ascaridida Secernentea genera {{nematode-stub