Using the mitochondrial non-coding region I, it was shown that the two Spanish Lampetra planeri populations (Cares-Deva and Olabidea-Ugarana) correspond to different genetic units. The Cares-Deva population is probably a recent offshoot of Lampetra fluviatilis, being the Olabidea-Ugarana population less diverse and of older origin.
Keywords: Lampetra planeri; non-coding region I; phylogeography.
© 2014 The Fisheries Society of the British Isles.