Monotrems And Marsupials

Phylogenetically isolated from other mammals monotremes-others diverged 190 mya marsupials-placentals diverged coulomb mya unmatched reproductive patterns monotremes egg laying marsupials passing altricial young, simple placenta I. Monotremata(ORDER) ballpark names platypus and scaly anteater Families Tachiglossidae, Ornithorhynchidae # species 3 Distribution Australia, Tasmania, New Guinea (echidna) 1. habitual characteristics of the order 1. Morphologically unique 2. Have many reptile characteristics 3. Birdlike skull with elongated rostrum 4. No teeth - Chew food with the spittle and bony denture at roof of give vocabulary to (echidna) or horny gums (platypus) 5. pectoralis girdle splayed as in reptiles 6. Pelvic girdle mammal-like 7. Epipubic cram that come up from the hip joint along the ventral spring up 2. Reproduction 1. drop eggs 2. Incubate them like birds 3. Have mammary glands and murder milk 4. No nipples 5. Milk is secreted onto the abdominal fur (platypus) or into a impermanent pouch and licked off the come up (echidna) 6. immense periods of maternal care 7. 1 offspring/ yr 3. Echidna(CLASS) 1. Morphology 1. Round, fat dead body 2. Short, summary spines covering body 3.

Tube-like rostrum covered with leathery skin 4. Long tongue coated with mucous ! 5. withdraw limbs (short, powerful, claws) 6. Small eyes 7. Females keep back 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. Live in burrows 4. misfortunate eyesight but great sense of smell 5. head off predators by 1) Digging down...If you want to get a mount essay, order it on our website: OrderCustomPaper.com

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