title: Mitochondrial DNA variation of an isolated population of the Adriatic brook lamprey Lampetra zanandreai (Agnatha: Petromyzontidae): phylogeographic and phylogenetic inferences.
abstract: Two mitochondrial genes were examined to compare an isolated population of the Adriatic brook lamprey Lampetra zanandreai in central Italy with other populations in the species range (Po plain) and with parasitic and freshwater lampreys. A single haplotype, identical to one in a Venetian sample, was found in 10 individuals from the isolated population. The reduced variability is consistent with a history of dispersal after the Pleistocene expansion of the Po basin. The results support the hypothesis of an origin of L. zanandreai and L. fluviatilis-L. planeri from a common anadromous ancestor.
authors.affiliation: Dipartimento di Biochimica, Biologia e Genetica, Università Politecnica delle Marche, via Ranieri, 65, 60100 Ancona, Italy. v.caputo@univpm.it
authors.forename: V
authors.initials: V
authors.lastname: Caputo
authors.forename: M
authors.initials: M
authors.lastname: Giovannotti
authors.forename: P
authors.initials: P
authors.lastname: Nisi Cerioni
authors.forename: A
authors.initials: A
authors.lastname: Splendiani
authors.forename: M
authors.initials: M
authors.lastname: Marconi
authors.forename: J
authors.initials: J
authors.lastname: Tagliavini
mesh_terms: D000818:Animals; D004272:DNA, Mitochondrial / Q000235:genetics*; D019143:Evolution, Molecular; D005828:Genetics, Population; D006239:Haplotypes; D007558:Italy; D007798:Lampreys / Q000145:classification / Q000235:genetics*; D010802:Phylogeny; D058974:Phylogeography; D017422:Sequence Analysis, DNA
chemical_list: D004272:DNA, Mitochondrial