title: Description of the nymph and larva and redescription of the female of Ixodes neuquenensis Ringuelet, 1947 (Acari: Ixodidae), a parasite of the endangered Neotropical marsupial Dromiciops gliroides Thomas (Microbiotheria: Microbiotheriidae).
abstract: The female of Ixodes neuquenensis Ringuelet, 1947 (Acari: Ixodidae) is redescribed and the nymph and larva are described from specimens collected from the endangered marsupial Dromiciops gliroides Thomas (Microbiotheria: Microbiotheriidae) in Argentina. At first sight the female of I. neuquenensis resembles a member of the subgenus Ixodes Latreille, 1795. However, the female of I. neuquenensis is peculiar in having the combination of two spurs on coxae II-IV and a pair of chitinous plaques internal to coxa I. Both the nymph and larva have an anterior and posterior process on palpal article I, characteristics of the subgenus Ixodiopsis Filippova, 1957 and some representatives of the subgenus Pholeoixodes Schulze, 1942. Analysis of 16S mitochondrial rDNA sequences showed no strong relationship with any known Ixodes subgenus.
authors.affiliation: Instituto Nacional de Tecnología Agropecuaria, CC 22, CP 2300 Rafaela, Santa Fe, Argentina.
authors.forename: Alberto A
authors.initials: AA
authors.lastname: Guglielmone
authors.forename: José M
authors.initials: JM
authors.lastname: Venzal
authors.forename: Guillermo
authors.initials: G
authors.lastname: Amico
authors.forename: Atilio J
authors.initials: AJ
authors.lastname: Mangold
authors.forename: James E
authors.initials: JE
authors.lastname: Keirans
mesh_terms: D000818:Animals; D001118:Argentina; D004247:DNA / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D005260:Female; D018884:Ixodes / Q000033:anatomy & histology* / Q000145:classification / Q000235:genetics; D007814:Larva / Q000033:anatomy & histology; D008394:Marsupialia / Q000469:parasitology*; D009758:Nymph / Q000033:anatomy & histology; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012689:Sequence Homology, Nucleic Acid; D013045:Species Specificity
chemical_list: D004275:DNA, Ribosomal; D012336:RNA, Ribosomal, 16S; D004247:DNA