title: Comparison of the external morphology of Rhipicephalus sanguineus (Latreille, 1806) (Acari: Ixodidae) ticks from Brazil and Argentina.
abstract: In the present study the external morphology of semi-engorged Rhipicephalus sanguineus females ticks from Brazil and Argentina were compared by scanning electron microscopy. Many differences were detected among the R. sanguineus collected at the two localities, such as body size, shape of the genital pore, and morphology of the sensory structures. All these characteristics are fundamental for the diagnosis of species of the genus Rhipicephalus and thus indicate the need for further comparisons and, the taxonomical revision of this species of tick in the Neotropics.
authors.affiliation: Departamento de Biologia, I.B., Universidade Estadual Paulista Júlio de Mesquita Filho, UNESP, Av. 24A 1515, Cx. Postal 199, CEP 13506-900, Rio Claro, SP, Brazil.
authors.forename: Patrícia Rosa
authors.initials: PR
authors.lastname: de Oliveira
authors.forename: Gervásio Henrique
authors.initials: GH
authors.lastname: Bechara
authors.forename: Sandra Eloisi
authors.initials: SE
authors.lastname: Denardi
authors.forename: Kelly Cristina
authors.initials: KC
authors.lastname: Saito
authors.forename: Erika Takagi
authors.initials: ET
authors.lastname: Nunes
authors.forename: Matias Pablo Juan
authors.initials: MP
authors.lastname: Szabó
authors.forename: Maria Izabel Camargo
authors.initials: MI
authors.lastname: Mathias
mesh_terms: D000818:Animals; D001118:Argentina; D001938:Brazil; D005260:Female; D008297:Male; D008855:Microscopy, Electron, Scanning / Q000662:veterinary; D048508:Rhipicephalus sanguineus / Q000033:anatomy & histology / Q000145:classification / Q000648:ultrastructure*