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American mastodon: Mammut americanum (Kerr)

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Colour photograph of a brown jawbone with two white teeth
American mastodon: Mammut americanum (Kerr). Quaternary. Hillsborough, New Brunswick. Collector: C. Osman, 1936. New Brunswick Museum (NBMG 3906). Tooth specimen length 30 cm. Mastodons and mammoths are east to tell apart based on their teeth. Mammoth teeth have flat ridges, like a modern elephant. Mastodon teeth have rounded or pointed cusps. The name mastodon comes from the teeth, derived from the Greek words "mastos" meaning breast and odont for tooth.