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mammalia    
n. 哺乳类

哺乳类

Mammalia
n 1: warm-blooded vertebrates characterized by mammary glands in
the female [synonym: {Mammalia}, {class Mammalia}]

Mammalia \Mam*ma"li*a\, n. pl. [NL., from L. mammalis. See
{Mammal}.] (Zool.)
The highest class of Vertebrata. The young are nourished for
a time by milk, or an analogous fluid, secreted by the
mammary glands of the mother.
[1913 Webster]

Note: Mammalia are divided into three subclasses;
[1913 Webster] I. {Placentalia}. This subclass embraces
all the higher orders, including man. In these the
fetus is attached to the uterus by a placenta.
[1913 Webster] II. {Marsupialia}. In these no placenta
is formed, and the young, which are born at an early
state of development, are carried for a time attached
to the teats, and usually protected by a marsupial
pouch. The opossum, kangaroo, wombat, and koala are
examples.
[1913 Webster] III. {Monotremata}. In this group, which
includes the genera {Echidna} and {Ornithorhynchus},
the female lays large eggs resembling those of a bird
or lizard, and the young, which are hatched like those
of birds, are nourished by a watery secretion from the
imperfectly developed mammae.
[1913 Webster]


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  • Mammal - Wikipedia
    A mammal (from Latin mamma 'breast') [1] is a vertebrate animal of the class Mammalia ( məˈmeɪli ə ) Mammals are characterised by the presence of milk -producing mammary glands for feeding their young, a broad neocortex region of the brain, fur or hair, and three middle ear bones
  • Mammal | Definition, Characteristics, Classification, Examples, Facts . . .
    mammal, (class Mammalia), any member of the group of vertebrate animals in which the young are nourished with milk from special mammary glands of the mother In addition to these characteristic milk glands, mammals are distinguished by several other unique features
  • Mammals – Definition, Examples, Characteristics
    Mammals are warm-blooded, hair-bearing vertebrates that produce milk Mammals represent a diverse and fascinating class of animals, encompassing a wide range of species from tiny shrews to humans to the colossal blue whale As members of the class Mammalia, they share certain defining characteristics that set them apart from other animal classes
  • MAMMALIA Definition Meaning | Merriam-Webster Medical
    The meaning of MAMMALIA is the highest class of the subphylum Vertebrata comprising humans and all other animals that nourish their young with milk secreted by mammary glands, that have the skin usually more or less covered with hair, a mandible articulating directly with the squamosal, a chain of small ear bones, a brain with four optic lobes
  • Mammalia
    Mammals (from Latin mamma, 'breast') are a group of vertebrates constituting the class Mammalia, characterized by the presence of mammary glands which in females produce milk for feeding (nursing) their young, a neocortex (a region of the brain), fur or hair, and three middle ear bones
  • Mammalia (mammals) | INFORMATION | Animal Diversity Web
    Different species of mammals have evolved to live in nearly all terrestrial and aquatic habitats on the planet Mammals inhabit every terrestrial biome, from deserts to tropical rainforests to polar icecaps Many species are arboreal, spending most or all of their time in the forest canopy
  • Mammals - National Geographic Kids
    Mammals include humans and all other animals that are warm-blooded vertebrates (vertebrates have backbones) with hair They feed their young with milk and have a more well-developed brain than other types of animals
  • About Mammals | American Society of Mammalogists
    The taxon to which mammals belong is the Class Mammalia, which is in the Phylum Chordata in the Kingdom Animalia Placing mammals in one Class indicates that they are more closely related to one another than any mammal is to an animal in a different Class
  • Mammal - New World Encyclopedia
    Mammals represent a "class" of vertebrates, Mammalia There are about 5,500 known species of mammals, which are distributed into various taxa, such as orders, families, genera, and so forth (see taxonomy)





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