Fig. 3

Neighbour-joining tree of Chondrostoma lusitanicum cyt b sequences, using Kimura’s (1980) 2-parameter distance. Number of substitutions (above) and percentage of 1000 bootstrapped replicates (below, in bold) that support each branch of the tree, presented only for branches representing geographical regions. C. polylepis and C. arcasi were used as outgroups to root the tree.