Gordius difficilis är en djurart som tillhör fylumet tagelmaskar, och som beskrevs av Montgomery 1898. Gordius difficilis ingår i släktet Gordius, och familjen Gordiidae. Inga underarter finns listade i Catalogue of Life.
Källor Poinar, George, Jr., and Clay M. Chandler (2004) Synopsis and identification of North American hairworms (Gordioidea: Nematomorpha), Journal of the Tennessee Academy of Science, vol. 79, no. 1 Schmidt-Rhaesa, Andreas, Ben Hanelt, and Will K. Reeves (2003) Redescription and compilation of Nearctic freshwater Nematomprpha (Gordiida), with the description of two new species, Proceedings of the Academy of Natural Sciences of Philadelphia, vol. 153
ITIS: The Integrated Taxonomic Information System. Orrell T. (custodian), 2011-04-26 (1996) , database, NODC Taxonomic Code Montgomery, Thomas H., Jr. (1898) The Gordiacea of certain American Collections with particular Reference to the North American Fauna, Bulletin of the Museum of Comparative Zoology, vol. 32, no. 3 Montgomery, Thomas H., Jr. (1907) The distribution of the North American Gordiacea, with description of a new species, Proceedings of the Academy of Natural Sciences of Philadelphia, vol. 59, part 2
Kategori:Tagelmaskar difficilis