Toothed whale porpoise as a fish. Toothed whales, as well as baleen whales, are descendants of land-dwelling mammals of the artiodactyl order (even-toed ungulates). They are closely related to the hippopotamus, sharing a common ancestor that lived around 54 million years ago (mya). The primitive cetaceans, or archaeocetes, first took to the sea approximately 49 mya and became fully aquatic by 5–10 million years later. The adaptation of echolocation and enhanced fat synthesis in blubber occurred when toothed whales split apart from baleen whales, and distinguishes modern toothed whales from fully aquatic archaeocetes. This happened around 34 mya. Unlike toothed whales, baleen
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