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Scientific classification
Kingdom: Animalia
Phylum: Nematoda
Class: Secernentea
Order: Spirurida
Superfamily: Thelazioidea
Family: Thelaziidae
Skrjabin, 1915

About 7, see text

Thelaziidae is a family of spirurian nematodes, which form the mid-sized lineage of the superfamily Thelazioidea. Like all nematodes, they have neither a circulatory nor a respiratory system.

They number 7 genera or so, with a few dozen species altogether. Mostly parasites birds, a few have also been found in other vertebrates.[1]


The subfamily Oxyspirurinae is monotypic, as are several little-known genera in the Thelaziinae; these all might not be valid. Altogether, the systematic layout of this family is liable to change and cannot be considered more than tentative.[1]

Subfamily Oxyspirurinae Skrjabin, 1916

Subfamily Thelaziinae Skrjabin, 1915


  1. ^ a b Hallan (2007)


  • Hallan, Joel (ed.) (2007): Family Thelaziidae. Version of 2007-AUG-07. Retrieved 2008-NOV-05.