Abstract
Rhabdias lamothei n. sp. (Nematoda: Rhabdiasidae) from the lungs of Leptodeira maculata (Colubridae) is described and illustrated. This is the 53rd species assigned to the genus and the first species described from an endemic snake in Mexico. Rhabdias lamothei differs from all other species by having the combination of the following characters: body coiled, truncated anterior end, 6 lips, equatorial vulvae, esophagus length /body length ratio 8.36–12.46 (10.31%), tail length / body length ratio 4.49–12.28 (6.98 %), and principally by the markedly elongated tail with a sharp terminal point. The geographical distribution of R. fuscovenosa is expanded in 13 localities and 6 new host records are provided.
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