Group 10 report


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Group 10 report

  1. 1. monos "single"+ trema "hole“, reffering to the cloaca
  2. 2. o Kingdom: Animalia o Phylum: Chordata o Class: Mammalia o Subclass: Prototheria o Order: Monotremata o Families: o Kollikodontidae† o Steropodontidae† o Ornithorhynchidae - Platypus o Tachyglossidae o Tachyglossus – Short-beaked echidna o Zaglossus – Long-beaked echidna
  3. 3.  Egg-laying mammals , they lay heavily yolked eggs. The egg is retained for some time within the mother, who actively provides the egg with nutrients. Endothermic Lacks pinna (has only ear slits) 3 bones in middle ear Brain lacks corpus callusom
  4. 4.  They have no nipples, a milky fluid oozes out from modifies sweat glands onto tufts of hairs in shallow pits of the abdomen, from which the young lick it up. The monotreme leg bears a spur in the ankle region, the spur is non-functional in echidnas, but contains a powerful venom in the male Platypus.
  5. 5.  Ornithorhynchidae  Tachyglossidae  Spends most of their time in the  Terrestrial animals water.  They have long, sticky tongues and  They have webbed feet for stout claws to gather food. swimming and for walking on  Armed with shard quills and rolls muddy river bottoms. into a ball for protection.  Soft, rubbery, sensitive, beaklike  Usually produces 1 egg only muzzle with which they detect invertebrates.  1 – 3 eggs
  6. 6.  Ornithorhynchus anatinus
  7. 7.  Tachyglossus - T. a. setosus Zaglossus - Zaglossus bruijni
  8. 8. o Kingdom: Animalia o Phylum: Chordata o Class: Mammalia o Subclass: Theria o Infraclass: Marsupialia o Order: Didelphimorphia Paucituberculata Microbiotheria Dasyuromorphia Peramelemorphia Notoryctemorphia Diprotodontia
  9. 9.  Non-placental mammals  Yolk sac serves as placenta  give birth to premature young climbs from the mothers birth canal to the nipples. it grabs on with its mouth and continues to develop  Some marsupials have a rudimentary placenta that functions for only a short time, such as the bandicoot
  10. 10.  females typically have an external pouch – “marsupium” in which the immature young are raised after birth until early infancy Short gestation times is due to having a yolk-type placenta in the mother marsupial (8-43 days)
  11. 11.  Epipubic bones(both sexes; whether ornot they have pouches)
  12. 12.  The female has two reproductive organ. Both open externally through one orifice, but lead to different compartments within the uterus. Males usually have a two-pronged reproductive organ, which corresponds to the females two reproductive organ.
  13. 13.  Teeth are either diprotodont ("two front teeth") or polyprotodont ("many front teeth")
  14. 14.  Digits are either didactylus (separate; ancestral state) or syndactylus ("fused toes")
  15. 15. Opossum
  16. 16. Rat Opossums
  17. 17. Monito del Monte
  18. 18. Thylacine Numbat Dasyure
  19. 19. Bandicoots
  20. 20. Marsupial Moles
  21. 21. Wombat Kangaroo
  22. 22.  Several mammalian characteristics  Vertebrates  Endothermic  Presence of fur/skin/hair  Breathing through lungs  Production of milk to feed young  3 middle ear bones
  23. 23.  Both lack corpus callosum  It is a brain structure that connects the left and the right hemisphere of the brain
  24. 24.  Presence of epipubic bones  A rod-like bone which projects forward from the pelvis. In female marsupials, supports the Marsupium.
  25. 25. 1) Monotremes are egg-laying, while marsupials give birth to live, helpless young.
  26. 26. 2) Monotremes excrete milk through mammary glands located in the skin, while marsupials have nipples where milk passes.
  27. 27. 3) Monotremes have a single cloaca while marsupials have separate genital and urinary tracts, although an external trace of the cloaca still exists.
  28. 28. 4) Monotremes lack teeth; instead they chew food with bony plate at roof of mouth (echidna) or roughened gums (platypus). Marsupials have teeth.
  29. 29.  Marsupials have bifid reproductive organs while monotremes do not.  Bifid – split into 2
  30. 30. 6) Outer ear of monotremes lack pinna (ear lobe) while marsupials have pinna.
  31. 31.  Monotremes have reptilian/birdlike characteristics (especially in platypus) while marsupials closely resemble the other mammals.