title: Phylogenetic patterns in populations of Chilean species of the genus Orestias (Teleostei: Cyprinodontidae): results of mitochondrial DNA analysis.
abstract: Patterns of molecular genetic differentiation among taxa of the "agassii species complex" (Parenti, 1984) were analysed based on partial mtDNA control region sequences. Special attention has been paid to Chilean populations of Orestias agassii and species from isolated lakes of northern Chile, e.g., O. agassii, Orestias chungarensis, Orestias parinacotensis, Orestias laucaensis, and Orestias ascotanensis. Orestias tschudii, Orestias luteus, and Orestias ispi were analysed comparatively. Our findings support the utility of mtDNA control region sequences for phylogenetic studies within the "agassii species complex" and confirmed the monophyly of this particular lineage, excluding O. luteus. However, the monophyly of further morphologically defined lineages within the "agassii complex" appears doubtful. No support was found for the utility of these data sets for inferring phylogenetic relationships between more distantly related taxa originating from Lake Titicaca.
authors.affiliation: Zoologisches Institut und Zoologisches Museum der Universität Hamburg, Martin Luther King Pl. 3, 20146 Hamburg, Germany. arne.luessen@uni-hamburg.de
authors.forename: Arne
authors.initials: A
authors.lastname: Lüssen
authors.forename: Thomas M
authors.initials: TM
authors.lastname: Falk
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Villwock
mesh_terms: D000818:Animals; D001483:Base Sequence; D002677:Chile; D004272:DNA, Mitochondrial / Q000235:genetics*; D019143:Evolution, Molecular; D005828:Genetics, Population; D006239:Haplotypes; D007695:Killifishes / Q000145:classification / Q000235:genetics*; D010802:Phylogeny; D012689:Sequence Homology, Nucleic Acid; D013045:Species Specificity; D013997:Time Factors
chemical_list: D004272:DNA, Mitochondrial