title: Phylogeography of the armadillo Chaetophractus villosus (Dasypodidae Xenarthra): post-glacial range expansion from Pampas to Patagonia (Argentina).
abstract: We report a phylogeographic study of Chaetophractus villosus populations in Argentina. Control Region (CR) sequences (484 bp) were obtained for 76 C. villosus from 20 locations across the species whole distribution range. Seventeen new haplotypes were identified. The highest genetic variation and the earliest fossils were found in the Pampean Region, thus appearing as the most probable area of origin of the species. A general pattern of Contiguous Range Expansion (CRE) was revealed by Nested Clade Analysis (NCA) supported by mismatch analysis and Fu's test. The Pampean Region would have been the pre-expansion area, while Patagonia would have been the main dispersal route of contiguous expansion, possibly after the Pleistocenic glaciations.
authors.affiliation: Laboratorio de Ecología Molecular, Centro Regional de Estudios Genómicos, Universidad Nacional de La Plata, Av. Calchaquí km 23.5 Piso 4, CP 1888 Florencio Varela, Buenos Aires, Argentina.
authors.forename: Sebastián
authors.initials: S
authors.lastname: Poljak
authors.affiliation: Laboratorio de Investigación en Filogenias Moleculares y Filogeografía, Departamento de Ecologia, Genetica y Evolución, Fac. de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina.
authors.forename: Viviana
authors.initials: V
authors.lastname: Confalonieri
authors.affiliation: Laboratorio de Ecología Molecular, Centro Regional de Estudios Genómicos, Universidad Nacional de La Plata, Av. Calchaquí km 23.5 Piso 4, CP 1888 Florencio Varela, Buenos Aires, Argentina.
authors.forename: Mariana
authors.initials: M
authors.lastname: Fasanella
authors.affiliation: Laboratorio de Ecología Molecular, Centro Regional de Estudios Genómicos, Universidad Nacional de La Plata, Av. Calchaquí km 23.5 Piso 4, CP 1888 Florencio Varela, Buenos Aires, Argentina.
authors.forename: Magalí
authors.initials: M
authors.lastname: Gabrielli
authors.affiliation: Laboratorio de Ecología Molecular, Centro Regional de Estudios Genómicos, Universidad Nacional de La Plata, Av. Calchaquí km 23.5 Piso 4, CP 1888 Florencio Varela, Buenos Aires, Argentina. Electronic address: mlizarralde@creg.org.ar.
authors.forename: Marta Susana
authors.initials: MS
authors.lastname: Lizarralde
mesh_terms: D000818:Animals; D001118:Argentina; D001135:Armadillos / Q000145:classification / Q000235:genetics*; D004272:DNA, Mitochondrial / Q000235:genetics; D019143:Evolution, Molecular; D005580:Fossils; D014644:Genetic Variation; D005828:Genetics, Population; D005843:Geography; D006239:Haplotypes; D010802:Phylogeny; D017422:Sequence Analysis, DNA
chemical_list: D004272:DNA, Mitochondrial