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 seven genera or so, with a few dozen species all together. Mostly parasites of birds, a few have also been found in other vertebrates.Hallan (2007)
Systematics The subfamily Oxyspirurinae is monotypic, as are several little-known genera in the Thelaziinae; these all might not be valid. All together, the systematic layout of this family is liable to change and cannot be considered more than tentative.
Subfamily Oxyspirurinae Skrjabin, 1916 Oxyspirura Dräsche in Stossich, 1897
Subfamily Thelaziinae Skrjabin, 1915 Ceratospira Schneider, 1866 Hempelia Vaz, 1937 Pancreatonema McVicar & Gibson, 1975 Pericyema Railliet, 1925 Thelazia Bosc in Blainville, 1819 Thylaconema Chandler, 1929
Footnotes
References (2007): Family Thelaziidae. Version of 2007-AUG-07. Retrieved 2008-NOV-05.