Dichotomous Key/Sirenia

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

1: Shape of tail

2: Trichechidae

3: Geographic Location