Fig. 4

Phylogenetic tree based on mitochondrial DNA control-region sequences (435 bp) among 23 species in the family Ziphiidae, including the Miyako specimen of Longman’s beaked whale using the maximum likelihood (ML) method. The scale bar indicates 0.05 substitutions per site. Numbers above the nodes represent bootstrap values > 50%. The square represents the Miyako specimen of Longman’s beaked whale