Dugongidae

Camels belong to the biological family Camelidae.

Dugons belong to the family Dugongidae.

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Extant members are easily identified due to their trunks, thick skin, large ears, large size, high intelligence, longevity, social bonds, and extreme habitat loss.

Finally, members of order Sirenia, commonly referred to as sea cows or sirenians, includes just four species, a single species of dugong in the family Dugongidae, and three species of manatees in the family Trichechidae, the Amazonian manatee, the West Indian manatee, and the African manatee.

They are noted for their fully aquatic herbivorous lifestyle, fusiform bodies, heavy bones, and thick blubber.

Moving on, Xenarthra includes just two orders of placental mammals.