Example image of eyePlorer eyePlorer map for 'Monotreme': Cloaca Eutheria Mammal Marsupial Metatheria Prototheria Echidna Platypoda Platypus Australosphenida Clade Hair Middle ear Milk Warm-blooded Corpus callosum Anus Urethra Vagina Mammary gland Nipple Commonly used terms of relationship and comparison in dentistry Cusp (dentistry) Molar (tooth) Cynodont Synapsid Theria Coracoid Interclavicle Platypus venom Thermoregulation Hyrax Normal human body temperature Rapid eye movement sleep Australia New Guinea Lightning Ridge, New South Wales New South Wales Steropodon Kollikodon Obdurodon Teinolophos Argentina Molecular clock Eastern Long-beaked Echidna Ornithorhynchidae Short-beaked Echidna Sir David's Long-beaked Echidna Western Long-beaked Echidna Miocene