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Thursday 23 October 2014

Discovery of Mammals


LIGHTING
There are 225 million years, reptiles mammalian gave birth to the group Pantothériens, the current strain of Mammals.
They then proliferated in the early Tertiary, there were 65 million years, with the disappearance of the dinosaurs.
The most advanced, man (Homo erectus), is published there are only 3 million years
Position in the animal world:
The mammals are the most advanced of the animal world Despite their small numbers: about 5 900 species
- In comparison:
The Reptiles = 9 080 species
Birds = 10 030 species
Fishs = 31 300
Insects = more than 1 million species
Features:
They differ from other animals by certain characters:
- Method of reproduction specific the growth of embryos is provided by a placenta in the womb (except among Monotrèmes)
- Breast-feeding their children
- Internal temperature constant, and coat more or less developed

NAVIGATION
Accès à la Table de Découverte des Mammifères
The 27 to 29 orders of mammals can be divided into 9 groups
Click on the selected order to access the table Discovery
They reproduce differently MONOTREMES   They eat the flesh CARNIVORES
MARSUPIAUX PINNIPEDES
They are without teeth XENARTHRES   They eat insects INSECTIVORES
PHOLIDOTES AFROSORICIDES
They gnaw LAGOMORPHES SCANDENTIENS
RODENTIENS MACROSCELIDES
They live in water CETACES   They eat Plant PROBOSCIDIENS
SIRENIENS HYRACOIDES
They fly CHIROPTERES TUBULIDENTES
DERMOPTERES PERISSODACTYLES
They live in trees PRIMATES ARTIODACTYLES

MORE ABOUT
Discover species by Group resemblance
This selection list introduced mammal species, grouped by the principle of comparative anatomy, morphological similarity and geographical location. (See the menu Taxinomy, for more information on the classification of mammals).
 
Knowing all mammalian species
Scientists consider that a species is distinct by the fact that it can not reproduce with each other. This list shows all the species listed by their common name.


 
Recognize mammalian
Mammalian species have a wide variety of morphological differences due to factors such as mode of reproduction, diet, mode of locomotion, habitat,....
single species may include several sub-species, which differ by physical criteria (coat, size ,...), often related to the geographical area in which they live.
You know visually a species, but you do not know his name !
Select your level to identify
Beginner Identification of family resemblance
Expert Identification from the taxonomy
Identification from a geographical area
rison between genus and sub-species