''Uncinaria'' is a genus of

nematode The nematodes ( or ; ; ), roundworms or eelworms constitute the phylum Nematoda. Species in the phylum inhabit a broad range of environments. Most species are free-living, feeding on microorganisms, but many are parasitic. Parasitic worms (h ...

s. The genus was

circumscribed In geometry, a circumscribed circle for a set of points is a circle passing through each of them. Such a circle is said to ''circumscribe'' the points or a polygon formed from them; such a polygon is said to be ''inscribed'' in the circle. * Circum ...

Josef Aloys Frölich Josef Aloys Frölich or Alois von Frölich (10 March 1766, Marktoberdorf – 11 March 1841) was a German doctor, botanist and entomologist. He is not to be confused with Franz Anton Gottfried Frölich (1805–1878), his son, also an entomologi ...

in 1789. Species include: * '' Uncinaria criniformis'' * '' Uncinaria lucasi'' * '' Uncinaria sanguinis'' * ''

Uncinaria stenocephala ''Uncinaria stenocephala'' is a nematode that parasitizes dogs, cats, and foxes, as well as humans. It is rare to find in cats in the United States. ''U. stenocephala'' is the most common canine hookworm in cooler regions, such as Canada and th ...

'' * '' Uncinaria yukonensis''

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