Seven specimens belong to the genus Gordius, but could not be determined to species level.
The character combination of an angled postcloacal crescent and bristle-like structures on the cuticle is not present in the other Gordius species described.
Discussion: The arrangement of bristles in the posterior end forming a line on the tail lobes occurs in few species of the genus Gordius. In G.
Discussion: The presence of long bristles at the posterior tip of the tail lobes has not been described from other species in the genus Gordius and is therefore regarded here as a new character.
In addition, Bolek and Coggins (2002) removed three Gordius difficilis from the intestines of two green frogs (Rana clamitans), but they did not indicate whether they thought that the worms were preyed upon directly or had been present initially in other invertebrates consumed by the frogs.
(1999) identified horsehair worms from several sites in Wisconsin and Minnesota as Gordius robustus, the only species in the genus previously reported from the Midwest (Chandler 1985, Watermolen and Haen 1994), on the basis of the presence in males of a bibbed posterior and a post-cloacal crescent.
Seasonal occurrence, morphology, and observations on the life history of Gordius difficlilis (Nematomorpha: Gordioidea) from southeastern Wisconsin, United States.
New host and distribution record of Gordius difficilis (Nematomorpha: Gordioidea) from a vivid metallic ground beetle, Chlaeius prasinus (Coleoptera: Carabidae) from western Nebraska, U.S.A.
Gordius attoni Redlich 1980 has been reported from northern North America (Redlich, 1980; Schmidt-Rhaesa et al., 2003).
Gordius difficilis Montgomery 1898a (Smith 1994) has been reported from eastern North America (Smith, 1994).
Gordius robustus Leidy 1851 occurs throughout North America, including Mexico (Chandler, 1985; Camerano, 1915) and Hawaii (Montgomery, 1898a; Heinze, 1934).
comb (Montgomery 1898a) (Camerano, 1915) (Schmidt-Rhaesa et al., 2003) Gordius densareolatus Montgomery 1898a G.