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Mammalogy

Subclass Prototheria Order Monotremata

QuestionAnswer
Location of Monotremata Australia and New Guinea
Ancestral Traits of Monotremata Ovipary; No corpus callosum; Cloaca
Primitive Traits of Monotremata Cervical ribs; Low body temperature and unstable; Epipubic bones; Reptile like testes and sperm; Pectoral girdle with coracoid bone, precoracoid bone, and interclavicle bones
Mammalian Traits of Monotremata Hair; Mammary glands with no nipple; Dental-squamosal articulation; Three ear bones; Left aortic arch with four chamber heart
Distinctive Traits of Monotremata No adult teeth (dentate); Abdominal testes with no scrotum; Baculum; K-selected; No vibrissae
Reproductive Traits of Monotremata Small eggs; 10-11 days of incubation; Only left ovary sheds eggs
Family Tachyglossidae Echidnas/Spiny anteaters; Myrmecophagy; Spurs with no venom; Pouch with a single young
Family Ornithorhynchidae Duck billed platypus; Aquatic; Feed on invertebrates; Beak with nerve endings; Venom in spur; No pouch, burrow for eggs
Created by: LionsandGiants
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