Evolutionary history of lamprey paired speciesLampetra fluviatilis(L.) andLampetra planeri(Bloch) as inferred from mitochondrial DNA variation

• DOI: 10.1111/j.1365-294x.2007.03279.x
• Publication Date: 2007-03-02T16:43:50Z
• Authors: RUTE ESPANHOL; PEDRO R. ALMEIDA; M. JUDITE ALVES
• Keywords: Lampetra; Variation (astronomy)

Abstract A remarkable trend in the evolution of lampreys is occurrence most genera ‘paired species’, which parasitic anadromous are believed to have given rise nonparasitic freshwater resident populations. The present work examines phylogeography European paired species Lampetra fluviatilis and planeri , an attempt elucidate pair evolutionary history. We studied sequence variation cytochrome b ATPase 6, 8 mitochondrial genes 63 individuals from 21 localities throughout their distribution range. Results phylogenetic nested clade analyses were largely consistent, suggesting existence three major lineages: lineage I possibly II widespread Europe, while ancestral III apparently restricted Iberian Peninsula. high genetic diversity observed Peninsula probably result refugial persistence subsequent accumulation over several ice ages, whereas low levels central northern Europe should reflect a rapid postglacial colonization. suggest that L. originated within at least two distinct lineages, rejecting single origin hypothesis. lack taxa monophyly may be ongoing gene flow if alternate life‐history forms species. However, structure also consistent with hypothesis divergence after dispersion (around 2000 generations ago) incomplete sorting. Further testing alternative hypotheses warranted.