Rhabdias ambystomae sp n. (Nematoda: Rhabdiasidae) from the north American spotted salamander Ambystoma maculatum (Amphibia: Ambystomatidae)

Rhabdias ambystomae sp. n. is described on the basis of specimens found in the lungs and body cavity of the spotted salamander (Ambystoma maculatum) from northwestern Wisconsin, U.S.A. The new species differs from Rhabdias bermani in tail shape, arrangement of circumoral lips, and position of vulva, from Rhabdias tokyoensis in the morphology and size of the buccal capsule and the shape of the esophagus, and from Rhabdias americanus in the absence of pseudolabia at the cephalic extremity and the shape of the tail. Rhabdias ambystomae sp. n. is the first species of the genus described from salamanders in North America.