title: Heligmosomoides johnsoni sp. nov. (Nematoda: Heligmosomatidae) from the heather vole, Phenacomys intermedius Merriam.
mesh_terms: D000818:Animals; D009348:Nematoda / Q000145:classification*; D009349:Nematode Infections / Q000209:etiology / Q000662:veterinary*; D012376:Rodent Diseases / Q000209:etiology*; D012377:Rodentia