title: A new species of Syphacia (Nematoda: Oxyuridae) from Akodon azarae (Rodentia: Cricetidae) in Argentina.
abstract: Eight species of Syphacia (Nematoda: Oxyuridae) have been reported from South America in rodents of the Sigmodontinae, only 1 of which has been recorded in Argentina. Syphacia (Syphacia) carlitosi n. sp. is described from the ceca of Akodon azarae bibianae and Akodon azarae hunteri (Sigmodontinae: Akodontini) captured in 3 provinces in the northeast region of Argentina. The new species is differentiated principally by the shape of the cephalic plate; distribution of submedian papillae and amphids; presence, extent, and shape of cervical alae in females; absence of lateral alae; absence of deirids; spicular and gubernaculum length; shape and structure of accessory hook of gubernaculum; and distance of mamelons, excretory pore, and vulva from the anterior extremity. This is the second record of Syphacia parasitizing rodents of the tribe Akodontini.
authors.affiliation: Centro de Estudios Parasitológicos y de Vectores (CEPAVE) (CONICET-UNLP), Calle 2 #584 (1900) La Plata, Argentina. rosario@cepave.edu.ar
authors.forename: Maria Rosario
authors.initials: MR
authors.lastname: del Robles
authors.forename: Graciela Teresa
authors.initials: GT
authors.lastname: Navone
mesh_terms: D000818:Animals; D001118:Argentina; D002432:Cecum / Q000469:parasitology; D005260:Female; D008297:Male; D008855:Microscopy, Electron, Scanning / Q000662:veterinary; D010123:Oxyuriasis / Q000469:parasitology / Q000662:veterinary*; D010124:Oxyuroidea / Q000033:anatomy & histology / Q000145:classification* / Q000648:ultrastructure; D012376:Rodent Diseases / Q000469:parasitology*; D016205:Sigmodontinae / Q000469:parasitology*