Different stocks of brook lamprey in Spain and their origin from Lampetra fluviatilis at two distinct times and places

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.