Abstract
Abstract The genetic diversity obtained by comparing mitochondrial DNA regions (the slowly evolving protein‐coding gene cytochrome b and the tRNAGlu gene) of three lamprey species belonging to different genera, Petromyzon marinus, Lethenteron zanandreai, and Lampetra planeri, is reported. The low degree of intergeneric variability detected, as compared with differences described for other fish taxa, supports the view of a recent evolutive separation of both Lethenteron and Lampetra from Petromyzon.
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