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Platypus Ornithorhynchus anatinus

Platypus Ornithorhynchus anatinus. Whitney Gunn David Coleman John Rice. Platypus Facts. Common Name: Platypus Scientific Name: Ornithorhynchus anatinus They live for about 10 to 15 years Natural habitat is East Australia and New Guinea Carnivorous diet Call sound. History.

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Platypus Ornithorhynchus anatinus

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  1. PlatypusOrnithorhynchus anatinus Whitney Gunn David Coleman John Rice

  2. Platypus Facts • Common Name: Platypus • Scientific Name: Ornithorhynchus anatinus • They live for about 10 to 15 years • Natural habitat is East Australia and New Guinea • Carnivorous diet • Call sound

  3. History • Estimate of the Monotremes-Theria divergence, time range between 160 and 120 Myr ago. • The red line shows these are small mammals that developed hair, lactation, and homoeothermic.

  4. Characteristics • Has spurs on its hind feet • Platypus is one of the few venomous mammals. • The male platypus can delivers a poison through a spur on its hind foot. • Adults do not have teeth • Baby platypus are born with teeth this may be due to a “throwback” from its ancestors. Once they lose them they do not grow new teeth back. • Adults do not need teeth because they use horny pads to grind their food.

  5. Characteristics • The have no true stomachs • Female platypus lay eggs • She lays 1-3 eggs, which she incubates between her abdomen and tail. • Lactation • The female platypus do not have nipples, so it’s young ones suck milk from patches on the abdomen

  6. Evolution of Platypus

  7. Evolution • Protamine P1 protein sequence

  8. Evolution Distance matrix DNA P Phylogenetic tree showing the relationships between monotremes, marsupials, and mammals

  9. Venomous Trait • The venom is made up of at least 19 different substances

  10. Lactation and Eggs • It has been proposed that early lactation evolved as a water source to protect porous parchment-shelled eggs from desiccation during incubation or as a protection against microbial infection. • Parchment-shelled egg-laying monotremes also exhibit a more ancestral glandular mammary patch or areola without a nipple that may still possess roles in egg protection

  11. Similarities • Both are only found in Australia and New Guinea • Monotreme means "one-holed," referring to the cloaca, a single hole that serves the urinary tract, anus, and reproductive tract in monotremes. • Both lay eggs

  12. Differences • Echidna • Has a point snout • Pointy spines on coat • Platypus • Has duck like bill • Short dark brown fur

  13. Further Studies • Recently scientist have been taking the platypus genome and comparing it to humans. • A study on why they secret milk through their abdominal muscles instead of through nipples would be helpful to further understand its evolutionary process.

  14. References • http://assets0.pubget.com/pdf/8269934.pdf • http://www.nature.com/nature/journal/v453/n7192/pdf/nature06936.pdf

  15. Picture Sources • http://soer.justice.tas.gov.au/2003/image/559/ilw/p-platypus_m.jpg • http://www.nature.com/nature/journal/v453/n7192/pdf/nature06936.pdf

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