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Dichotomous Key/Sirenia
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Sirenia Animalia Chordata Vertebrata Mammalia Placentalia Sirenia
Mammalia Mammalia Subclasses ../Marsupialia/ - ../Monotremata/ - ../Placentalia/ 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