title: New Dalyelliidae (Platyhelminthes, Rhabditophora) from Buenos Aires Province, Argentina, and their stylet ultrastructure.
abstract: Two new species of Dalyellidae, Dalyellia callvucurai n. sp. and Gieysztoria namuncurai n. sp., are described from temporary freshwater environments in central Buenos Aires Province, Argentina. The ultrastructure of the stylets of both species is also described. The new species of the genus Dalyellia is the second species of the genus found in the neotropics and the first whose stylet has been studied with scanning electron microscopy. Gieysztoria namuncurai n. sp. joins the seven species of the genus known in Argentina. The ultrastructural characteristics of the stylet place it in the Inaequales group, with complex stylets.
authors.affiliation: CONICET, División Zoología Invertebrados, Facultad de Ciencias Naturales y Museo UNLP, La Plata, Argentina.
authors.forename: Cristina
authors.initials: C
authors.lastname: Damborenea
authors.forename: Francisco
authors.initials: F
authors.lastname: Brusa
authors.forename: Carolina
authors.initials: C
authors.lastname: Noreña
mesh_terms: D000818:Animals; D001118:Argentina; D005260:Female; D005618:Fresh Water / Q000469:parasitology*; D008297:Male; D008855:Microscopy, Electron, Scanning / Q000662:veterinary; D010802:Phylogeny; D010986:Platyhelminths / Q000033:anatomy & histology / Q000145:classification / Q000648:ultrastructure; D013045:Species Specificity