Evolution of cetaceans "Caperea marginata") all have derived characteristics presently unknown in any cetothere and vice versa (such as a sagittal crest). The adaptation of echolocation occurred when toothed whales (Odontoceti) split apart from baleen whales, and distinguishes modern toothed whales from fully aquatic archaeocetes. This happened around 34 million years ago in a second cetacean radiation. Modern toothed whales do not rely on their sense of sight, but rather on their sonar to hunt prey. Echolocation also allowed toothed whales to dive deeper in search of food, with light no longer necessary for navigation, which opened up new food sources. Toothed whales
Toothed leaf chameleon Toothed leaf chameleon The toothed leaf chameleon, Brookesia dentata, is a species of chameleons endemic to northwestern Madagascar. It was first described by Mocquard in 1900: 345, and has been described numerous times since then, most recently by Townsend "et al." in 2009. It is affected by the collection of charcoal, forest fires, and the grazing of cattle. The toothed leaf chameleon is endemic to northwestern Madagascar, and its type locality is Sberbieville. It has been confirmed to be found at Andasibe, Mandraka, and Angavo-Anjozorobe. At the highest, the species can be found at above sea level. The International Union