Monotremes and Marsupials
Monotremes and Marsupials. Biol 455 Mammalogy Jan 27, 2005. Monotremata. Prototheria, retention of various reptilian features Two families: Ornithorhynchidae and Tachyglossidae Monotremata = “one opening” Cloaca, common opening of fecal, urinary and reproductive tracts
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