Dichotomous Key/Placentalia

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Dichotomous Key
Placentalia
Kingdom Animalia
Phylum Chordata
Subphylum Vertebrata
Class Mammalia
Subclass Placentalia
Parent key: Mammalia
Subclasses
Marsupialia - Monotremata - Placentalia
Key: Mammalia
Orders
Afrosoricida - Artiodactyla - Carnivora - Cetacea - Chiroptera - Dermoptera - Insectivora - Lagomorpha - Macroselidae - Perissodactyla - Pholidota - Primates - Proboscidea - Rodentia - Scandentia - Sirenia - Xenarthra

1

  • Pulp cavity
Dentine: The substance between the enamel (crown) or cementum (root) of a tooth and the pulp chamber.

2

  • Limbs
    • Adapted for flight or gliding - 3
    • Adapted for land movement or swimming - 4

3

4

  • Limbs adapted for swimming
    • Yes - 5
    • No - 6

5

  • Legs

6

  • Number of fingers

7

  • Hooves
    • Present - 10
    • Not present - 8

8

9

  • Incisors
    • Developed, located at the front of the jaw - 12
    • Undeveloped, side teeth used for grazing - 11

10

11

  • Teeth growth
    • Throughout lifetime - 12
    • Only during maturation - 13

12

13

  • Presence of bony scales

14

Could be of the order Pholidota or an armadillo (family Dasyopodidae)

15

  • Dentition
    • Prominent canines and carnassials - Carnivora
    • Other - 16

16

17

Could be of the orders Afrosoricida, Macroscelidea, Xenarthra, Scandentia, Insectivora, Cetacea