Phylogenetically isolated from other mammals monotremes-others diverged 190 mya marsupials-placentals diverged hundred mya unmatched reproductive patterns monotremes egg laying marsupials passing altricial young, simple placenta I. Monotremata(ORDER) ballpark names platypus and anteater Families Tachiglossidae, Ornithorhynchidae # species 3 Distribution Australia, Tasmania, New Guinea (echidna) 1. commonplace characteristics of the order 1. Morphologically unique 2. Have many reptile characteristics 3. Birdlike skull with elongated rostrum 4. No teeth - Chew forage with the spittle and bony denture at roof of blab (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 pelvis along the ventral spring up 2. Reproduction 1. move eggs 2. Incubate them like birds 3. Have mammary glands and transport milk 4. No nipples 5. Milk is secreted onto the abdominal fur (platypus) or into a impermanent pouch and licked off the unclothe (echidna) 6. immense periods of maternal care 7. 1 offspring/ course of instruction 3. Echidna(CLASS) 1. Morphology 1. Round, fat system 2. Short, summary spines covering body 3.
Tube-like rostrum covered with leathery skin 4. Long play coated with mucous ! 5. withdraw limbs (short, powerful, claws) 6. Small eyes 7. Females gain 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. slimy eyesight but great sense of smell 5. stay off predators by 1) Digging down...If you want to get a full essay, order it on our website:
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