title: Ohbayashinema abei sp. n. (Nematoda: Heligmosomidae) from the northern pika, Ochotona hyperborea Pallas, in Hokkaido, Japan.
mesh_terms: D000818:Animals; D007411:Intestinal Diseases, Parasitic / Q000469:parasitology / Q000662:veterinary*; D007564:Japan; D007793:Lagomorpha / Q000469:parasitology*; D008322:Mammals / Q000469:parasitology*; D009349:Nematode Infections / Q000469:parasitology / Q000662:veterinary*