Geographic distribution of the genus Lagenorhynchus. The subfamily Lissodelphininae (sensu LeDuc et al. ) includes all Southern Hemisphere species and L. obliquidens from the North Pacific. Generic names suggested by the taxonomic revision of Le Duc et al.  are indicated in parentheses, with Lagenorhynchus retained for the original type specimen (L. albirostris) first described by Gray .