platypus ornithorhynchus anatinus
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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

PlatypusOrnithorhynchus anatinus

Whitney Gunn

David Coleman

John Rice

platypus facts
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
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.
characteristics
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.
characteristics5
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
evolution
Evolution
  • Protamine P1 protein sequence
evolution8
Evolution

Distance matrix DNA

P

Phylogenetic tree showing the relationships between monotremes, marsupials, and mammals

venomous trait
Venomous Trait
  • The venom is made up of at least 19 different substances
lactation and eggs
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
similarities
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
differences
Differences
  • Echidna
    • Has a point snout
    • Pointy spines on coat
  • Platypus
    • Has duck like bill
    • Short dark brown fur
further studies
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.
references
References
  • http://assets0.pubget.com/pdf/8269934.pdf
  • http://www.nature.com/nature/journal/v453/n7192/pdf/nature06936.pdf
picture sources
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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