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Dichotomous Key/Monotremata
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Monotremata Animalia Chordata Vertebrata Mammalia Monotremata Monotremata
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: Teeth
Presence of teeth
Present - Ornithorhynchus anatinus, Platypus
Not present - #2: Tachyglossidae
2: Tachyglossidae
Length of snout
Long - Zaglossus
Short - Tachyglossus