title: Description of a new species of Heligmosomoides (Nematoda: Heligmosomidae) parasitic in Microtus limnophius (Rodentia: Cricetidae) from Rangtang, Sichuan, China.
abstract: Heligmosomoides craigi n. sp. (Nematoda: Heligmosomoidea) is described from Microtus limnophilus Büchner, 1889 (Rodentia: Cricetidae) from Rangtang, Sichuan, China. It is related to H. protobullosus Asakawa, 1987 and H. longispiculum Tokobaev & Erkulov, 1966 both parasites of Microtus spp. from Japan and USSR, respectively by the following features: a ratio of spicule length/body length of more than 45% and rays 9 shorter than rays 10. The new species is differentiated by rays 8 being closed to rays 6 and 19-22 cuticular ridges versus 14 in H. protobullosus (synlophe not described in H. longispiculum). H. longicirratus (Schulz, 1954) also a parasite of Microtus sp. from the USSR is the most closely related species based on the number of cuticular ridges (20) and the ratio of spicule length/body length (48% versus 50%). There are no illustrations of this species and the female has not been described; for that reason, it is not possible to compare it accurately with our specimens.
authors.affiliation: Université Pierre et Marie Curie, Paris, UMR 7207 CNRS-MNHN-UPMC "Centre de recherche sur la paléobiodiversité et les paléoenvironnements-CR2P". MNHN, 57, rue Cuvier, BP 48, 75231 Paris Cedex 05, France.
authors.forename: J
authors.initials: J
authors.lastname: Massoni
authors.forename: M C
authors.initials: MC
authors.lastname: Durette-Desset
authors.forename: J P
authors.initials: JP
authors.lastname: Quéré
authors.forename: F
authors.initials: F
authors.lastname: Audebert
mesh_terms: D000818:Animals; D003411:Arvicolinae / Q000469:parasitology*; D049628:Body Size; D002681:China; D005260:Female; D006369:Heligmosomatoidea / Q000033:anatomy & histology / Q000472:pathogenicity*; D007421:Intestine, Small / Q000469:parasitology; D008297:Male; D009348:Nematoda / Q000145:classification* / Q000472:pathogenicity; D009349:Nematode Infections / Q000662:veterinary*; D012376:Rodent Diseases / Q000469:parasitology*