Kingdoms Plantae and Animalia: Classification of Class Mammalia (For CBSE, ICSE, IAS, NET, NRA 2022)

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Classification of Class Mammalia

Image Showing Classification of Class Mammalia
Sub class PrototheriaSub class MetatheriaSub class Eutheria
No external earExternal ear presentExternal ear well developed
Teeth found only in youngteeth found in both young and adultsTeeth present in young as well as adults
Placenta absentNo placenta for nourishment to embryoPlacenta is present
Mammary glands are devoid of nipplesMammary glands presentMammary glands present
Females are oviparous. Example: Duck-bill platypus (Ornithorhynchus) .Immature young ones are born. Marsupium (pouch) is present in females. Example: Kangaroo (Macropus)Mature young ones are born. It is further classified as under.
Image Shoiwng Red Kangaroo
Image Showing Duck-Billed Platypus

Birds and mammals have a constant body temperature. They are termed homoiothermal.

Sub class Eutheria

  • Order: Rodentia: Small group of animals (Herbivorous and terrestrial) , incisors long, sharp and chisel shaped. Forelimbs shorter than the hind limbs, Example: Rat, squirrel.
Image Showing Squirrel
  • Order: Chiroptera: These are flying mammals. Fore limbs adapted for flight. Skin folds i.e.. patagium works as wing. Example: Bat.
Image Showing Bat
  • Order: Carnivora: Flesh-eating mammals. Large pointed and sharp canines to tear the flesh, Fingers with sharp claws, Example: Lion, Tiger, Cat, Dog.
Image Showing Carnivora Example
  • Order: Primates: Highly developed Brain. The neck is mobile. Eyes are set forward in the dead to provide binocular vision. Limbs have five digits with flat nails. Two thoracic mammae (breasts) present. Example: Monkey, Apes, Man.
Image Showing Squirrel Monkey
  • Order: Cetacea: Aquatic, fore-limbs are changed into paddles without neck and Fish-like shape but respiration by lungs. Example: whale.
Image Showing Killer Whale
  • Order: Proboscidea: Large, herbivorous, terrestrial. Fusion of upper lip and nose to form a long mobile trunk and only one pair of incisors in upper jaw which form huge tusks in males, Example: Elephant.
Image Showing Asian and African Elephant
  • Order: Ungulata: Hoofed mammals, Herbivorous, Usually domesticated by man and Mammae are abdominal with teats. Example: Deer, Cows, Sheep.
Image Showing Mule Deer

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