Sirenia is an order of fully aquatic, herbivorous mammals that live in rivers and marine wetlands. It includes four extant species, three manatees and the dugong, and the extinct Stellar's sea cow.
The treeshrews are small mammals native to the tropical forests of
Southeast Asia. Although called treeshrews, they are not true shrews and are not all
arboreal.
Rodents make up the largest order of mammals, with over 40% of mammalian species. They have two
incisors in the upper and lower jaw which grow continually and must be kept short by gnawing. Most rodents are small though the
capybara can weigh up to 45 kg (99 lb).
The lagomorphs comprise two families,
Leporidae (
hares and
rabbits), and Ochotonidae (
pikas). Though they can resemble
rodents, and were classified as a
superfamily in that order until the early 20th century, they have since been considered a separate order. They differ from rodents in a number of physical characteristics, such as having four incisors in the upper jaw rather than two.
Order:
Eulipotyphla (shrews, hedgehogs, gymnures, moles and solenodons)
Eulipotyphlans are insectivorous mammals.
Shrews and
solenodons resemble mice,
hedgehogs carry spines,
gymnures look more like large rats, while
moles are stout-bodied burrowers.
The bats' most distinguishing feature is that their forelimbs are developed as wings, making them the only mammals capable of flight. Bat species account for about 20% of all mammals.
Family:
Pteropodidae (flying foxes, Old World fruit bats)
The order Pholidota comprises the eight species of pangolin. Pangolins are anteaters and have the powerful claws, elongated snout and long tongue seen in the other unrelated
anteater species.
The order Cetacea includes
whales,
dolphins and
porpoises. They are the mammals most fully
adapted to aquatic life with a spindle-shaped nearly hairless body, protected by a thick layer of blubber, and forelimbs and tail modified to provide propulsion underwater.
The even-toed ungulates are
ungulates whose weight is borne about equally by the third and fourth toes, rather than mostly or entirely by the third as in
perissodactyls. There are about 220 artiodactyl species, including many that are of great economic importance to humans.
^Đặng, N.C.; Endo, H.; Son, N.T.; Oshida, T.; Canh, T.X.; Phurong, Đ.H.; Lunde, D.P.; Kawada, S.I.; Hayashida, A.; Sasaki, M. (2008).
Checklist of wild mammal species of Vietnam. Inuyama, Japan & Hanoi, Vietnam: Primate Research Institute, Kyoto University & Institute of Ecology and Biological Resources.
ISBN9784879746122.
Sirenia is an order of fully aquatic, herbivorous mammals that live in rivers and marine wetlands. It includes four extant species, three manatees and the dugong, and the extinct Stellar's sea cow.
The treeshrews are small mammals native to the tropical forests of
Southeast Asia. Although called treeshrews, they are not true shrews and are not all
arboreal.
Rodents make up the largest order of mammals, with over 40% of mammalian species. They have two
incisors in the upper and lower jaw which grow continually and must be kept short by gnawing. Most rodents are small though the
capybara can weigh up to 45 kg (99 lb).
The lagomorphs comprise two families,
Leporidae (
hares and
rabbits), and Ochotonidae (
pikas). Though they can resemble
rodents, and were classified as a
superfamily in that order until the early 20th century, they have since been considered a separate order. They differ from rodents in a number of physical characteristics, such as having four incisors in the upper jaw rather than two.
Order:
Eulipotyphla (shrews, hedgehogs, gymnures, moles and solenodons)
Eulipotyphlans are insectivorous mammals.
Shrews and
solenodons resemble mice,
hedgehogs carry spines,
gymnures look more like large rats, while
moles are stout-bodied burrowers.
The bats' most distinguishing feature is that their forelimbs are developed as wings, making them the only mammals capable of flight. Bat species account for about 20% of all mammals.
Family:
Pteropodidae (flying foxes, Old World fruit bats)
The order Pholidota comprises the eight species of pangolin. Pangolins are anteaters and have the powerful claws, elongated snout and long tongue seen in the other unrelated
anteater species.
The order Cetacea includes
whales,
dolphins and
porpoises. They are the mammals most fully
adapted to aquatic life with a spindle-shaped nearly hairless body, protected by a thick layer of blubber, and forelimbs and tail modified to provide propulsion underwater.
The even-toed ungulates are
ungulates whose weight is borne about equally by the third and fourth toes, rather than mostly or entirely by the third as in
perissodactyls. There are about 220 artiodactyl species, including many that are of great economic importance to humans.
^Đặng, N.C.; Endo, H.; Son, N.T.; Oshida, T.; Canh, T.X.; Phurong, Đ.H.; Lunde, D.P.; Kawada, S.I.; Hayashida, A.; Sasaki, M. (2008).
Checklist of wild mammal species of Vietnam. Inuyama, Japan & Hanoi, Vietnam: Primate Research Institute, Kyoto University & Institute of Ecology and Biological Resources.
ISBN9784879746122.