Monotrems And Marsupials

Phylogenetically isolated from some other mammals monotremes-others diverged 190 mya marsupials-placentals diverged 100 mya one(a) reproductive patterns monotremes egg laying marsupials super altricial young, simple placenta I. Monotremata(ORDER) parkland names platypus and echidna Families Tachiglossidae, Ornithorhynchidae # species 3 statistical distribution Australia, Tasmania, New Guinea (echidna) 1. customary characteristics of the order 1. Morphologically unique 2. Have galore(postnominal) reptilian characteristics 3. Birdlike skull with elongated stump 4. No teeth - Chew food with the spittle and bony home base at roof of oral cavity (echidna) or horny gums (platypus) 5. pectoralis girdle splayed as in reptiles 6. Pelvic girdle mammal-like 7. Epipubic wad that come up from the hip joint along the ventral terpsichore up 2. Reproduction 1. Lay eggs 2. loom them like birds 3. Have mammary glands and dispatch milk 4. No nipples 5. milk is secreted onto the abdominal fur (platypus) or into a impermanent start and licked off the pare down (echidna) 6. immense periods of maternal care 7. 1 offspring/year 3. Echidna(CLASS) 1. Morphology 1. Round, blue body 2. Short, summary spines covering body 3.

Tube-like rostrum covered with leathery skin 4. enormous tongue coated with mucous 5. pack limbs (short, powerful, claws) 6. Small eyes 7. Females have a temporary pouch for carrying eggs and babies; structure may be back up by epipubic bones 2. Ecology and behavior 1. Solitary 2. Crepuscular 3. lie in in burrows 4. slimy eyesight but great comprehend of smell 5. Avoid predators by 1) Digging down...If you expect to get a large essay, order it on our website: Ordercustompaper.com

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