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Hace 1 día · Narwhal. The narwhal ( Monodon monoceros) is a medium-sized toothed whale native to the Arctic Circle. As the only member of the genus Monodon, the narwhal is closely related to the beluga whale, and the two species can interbreed. Adults range in body-to-tail length from 3.0 to 5.5 m (9.8 to 18.0 ft) and weigh 800 to 1,600 kg (1,800 to 3,500 ...
Hace 1 día · Mammal classification has been through several revisions since Carl Linnaeus initially defined the class, and at present, no classification system is universally accepted. McKenna & Bell (1997) and Wilson & Reeder (2005) provide useful recent compendiums. Simpson (1945) provides systematics of mammal origins and relationships that had been taught universally until the end of the 20th century.
