Dichotomous Key/Sirenia
| 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
- Tail shape
- Forked - Dugong dugon
- Paddle-shaped - #2: Trichechidae
2: Trichechidae
- Fingernails
- No nails on forelimbs - Amazonian Manatee, Trichechus inunguis
- Nails on forelimbs - #3: Geographic Location
3: Geographic Location
- Rivers, estuaries, or coastal waters in the
- Western Atlantic - Trichechus manatus
- Eastern Atlantic - Trichechus senegalensis