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- noun Plural form of
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Proboscidea: A monograph of the discovery, evolution, migration and extinction of the mastodonts and elephants of the world, by Henry Fairfield Osborn
And here is a serious paper fee required for more than an abstract called "The catastrophic extinction of North American mammoths and mastodonts" by Gary Haynes, which will explain in detail why it was humans, not climate, that did in the elaphants.