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Trichechidae

Manatees
FL fig04.jpg
Antillean manatee
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Sirenia
Family: Trichechidae
Gill, 1872
Genus: Trichechus
Linnaeus, 1758
Species

Trichechus inunguis
Trichechus manatus
Trichechus senegalensis
Trichechus "pygmaeus" (validity questionable)


Trichechus inunguis
Trichechus manatus
Trichechus senegalensis
Trichechus "pygmaeus" (validity questionable)

Manatees (family Trichechidae, genus Trichechus) are large, fully aquatic, mostly herbivorous marine mammals sometimes known as sea cows. There are three accepted living species of Trichechidae, representing three of the four living species in the order Sirenia: the Amazonian manatee (Trichechus inunguis), the West Indian manatee (Trichechus manatus), and the West African manatee (Trichechus senegalensis). They measure up to 4.0 metres (13.1 ft) long, weigh as much as 590 kilograms (1,300 lb), and have paddle-like flippers. The etymology of the name is dubious, with connections having been made to Latin "manus" (hand), and to a word sometimes cited as "manati" used by the Taíno, a pre-Columbian people of the Caribbean, meaning "breast". Manatees are occasionally called sea cows, as they are slow plant-eaters, peaceful and similar to cows on land. They often graze on water plants in tropical seas.

Manatees comprise three of the four living species in the order Sirenia. The fourth is the Eastern Hemisphere's dugong. The Sirenia are thought to have evolved from four-legged land mammals over 60 million years ago, with the closest living relatives being the Proboscidea (elephants) and Hyracoidea (hyraxes).


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Wikipedia

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