What ancestors is the vaquita?

The vaquita (Phocoena sinus) is a small porpoise native to the northern part of the Gulf of California. Its ancestors are believed to have diverged from other cetaceans around 15 million years ago, during the Miocene epoch. The vaquita is most closely related to other species within the family Phocoenidae, which includes various porpoises. Its lineage reflects adaptations to a unique marine environment, but it remains critically endangered due to habitat loss and bycatch in fishing nets.