Mammal
- Subclass Multituberculata (extinct)
- Plagiaulacida
- Cimolodonta
- Subclass Palaeoryctoides (extinct)
- Subclass Triconodonta (extinct)
- Subclass Placentalia
- Afrosoricida
- Artiodactyla
- Carnivora
- Cetacea
- Chiroptera
- Creodonta (extinct)
- Dermoptera
- Desmostylia (extinct)
- Embrithopoda (extinct)
- Hyracoidea
- Insectivora
- Lagomorpha
- Litopterna (extinct)
- Macroscelidea
- Notoungulata (extinct)
- Perissodactyla
- Pholidota
- Primates
- Proboscidea
- Rodentia
- Scandentia
- Sirenia
- Tubulidentata
- Xenarthra
- Subclass Marsupialia
- Dasyuromorphia
- Didelphimorphia
- Diprotodontia
- Microbiotheria
- Notoryctemorphia
- Paucituberculata
- Peramelemorphia
- Subclass Monotremata
- Monotremata
The mammals are the class of vertebrate animals characterized by the presence of mammary glands, which in females produce milk for the nourishment of young; the presence of hair or fur; and which have endothermic or "warm-blooded" bodies. The brain regulates endothermic and circulatory systems, including a four-chambered heart. Mammals encompass some 5500 species, distributed in about 1200 genera, 152 families and up to 46 orders, though this varies depending on the classification scheme adopted.
Related Topics:
Class - Vertebrate - Animal - Mammary gland - Females - Milk - Hair - Fur - Warm-blooded - Heart - Species - Genera - Families - Order - Classification scheme
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Phylogenetically, Mammalia is defined as all of the descendants of the last common ancestor of monotremes (e.g., echidnas) and therian mammals (placentals and marsupials).
Related Topics:
Phylogenetically - Monotreme - Echidna - Therian - Placental - Marsupial
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~ Table of Content ~
| ► | Introduction |
| ► | Characteristics |
| ► | Origins |
| ► | Classification |
| ► | References |
| ► | See also |
| ► | External link |
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