title: The genus Travassosius Khalil, 1922 (Nematoda, Trichostrongyloidea) in beaver, Castor spp.: a review and suggestion for speciation.
mesh_terms: D000818:Animals; D009348:Nematoda / Q000145:classification / Q000302:isolation & purification*; D012377:Rodentia / Q000469:parasitology*