title: [The intraspecific taxonomic structure and identification of closely related species of ixodid ticks (Ixodidae)].
abstract: Two variants of intraspecific morphological differentiation of 7 palearctic species of Ixodidae and respectively two variants of their intraspecific taxonomic pattern have been revealed on the basis of the study of geographic variation of each species. Three species--Ixodes pavlovskyi Pom., 1946, Haemaphysalis erinacei Pavesi, 1884, Hyalomma asiaticum Sch. et Schl., 1929, are subdivided into subspecies, and four ones--I. ricinus (L., 1758), I. persulcatus Sch., 1930, I. crenulatus Koch, 1844, Dermacentor marginatus (Sulzer, 1776),--into morphotypes by the degree of distinction of the whole complex of active stages in ontogenesis. Acknowledging the conventional character of the categories of subspecies and morphotype their criteria have been formulated for ixodid ticks. Paleogeographic and ecological grounds are given. Some data of geographic variation of immature stages favour the identification of closely related species in concrete localities.
authors.forename: N A
authors.initials: NA
authors.lastname: Filippova
mesh_terms: D000818:Animals; D001096:Arachnid Vectors / Q000033:anatomy & histology / Q000145:classification; D017753:Ecosystem; D013045:Species Specificity; D013987:Ticks / Q000033:anatomy & histology / Q000145:classification*
vernacular_title: Vnutrividovaia taksonomicheskaia struktura i identifikatsiia blizkorodstvennykh vidov iksodovykh kleshcheĭ (Ixodidae).