Paenungulate
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Paenungulata (from Latin paene "almost" + ungulātus "having hooves"), is a clade of "sub-ungulates", which groups three extant mammal orders: Proboscidea (including elephants), Sirenia (sea cows, including dugongs and manatees), and Hyracoidea (hyraxes).
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At least two more possible orders are known only as fossils, namely Embrithopoda and Desmostylia.