The family Capillariidae was created by
Railliet in 1915. It is accepted in the most recent
classifications of the
Nematoda, in which it is one of the members of the order
Trichocephalida. However,
Capillaria and closely related
genera are sometimes included in the family
Trichinellidae in other
classifications. The
taxonomy of the Capillariidae is disputed: according to different
classifications, the family includes the single
genus Capillaria or 22 different
genera (
Amphibiocapillaria, Aonchotheca, Baruscapillaria, Calodium, Capillaria, Capillostrongyloides, Crocodylocapillaria, Echinocoleus, Eucoleus, Freitascapillaria, Gessyella, Liniscus, Paracapillaria, Paracapillaroides, Pearsonema, Paratrichosoma, Pseudocapillaria, Piscicapillaria, Pseudocapillaroides, Pterothominx, Schulmanela, and
Tenoranema). In 2017, a new genus was added to this list:
Lobocapillaria. Old literature, and sometimes modern medical literature, use
Capillaria as a
genus for
species included in all these
genera. In contrast, certain species parasitic in fish, previously classified in
Capillaria, are now considered members of the
genus Huffmanela (family
Trichosomoididae). The term
Capillariasis is generally used for diseases produced by species of
Capillaria, even if the species is now placed in another
genus. == Species ==