Term
|
Definition
-earliest amphibians
-first tetrapods w/4 legs and digits
-still fish-like |
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Term
| 10 characteristic transitions to land |
|
Definition
1. locomotion (fins to limbs)
2. shoulder girdle separated from skull (movement of head)
3. pelvic girdle attaches to vertebrate column (more support)
4. vertebrae become stronger
5. scales lost (weight and breathable skin)
6. lungs used more
7. circulation (beg. of double circuit)
8. water balance (so they don't dry out)
9. feeding (snap and grab; tongue)
10. sense organs (hearing, no lat. line system) |
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Term
|
Definition
-class labyrinthodonts
-live in moist environments
-spawn in water |
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Term
|
Definition
-descended from labyrinthodonts (NOT modern amphibians)
-lots of keratinization (reduces water loss)
-deeper skull than amph.
-exothermic |
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Term
|
Definition
| found in reptiles, embedded in sockets for a stronger bite |
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Term
|
Definition
like birds, strong shell to prevent drying
-macrolecithal |
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Term
|
Definition
embryonic membranes:
amnion (surrounds embryo)
allanthois
chorion (outer)
-fully formed young when hatched |
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Term
|
Definition
1. anapsids (no temporal fenestrae; primitive; only turtles now)
2. diaspids (2 temporal fenestrae) |
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Term
|
Definition
-birds
-endothermic
-feathers and scales
-cleidoic egg (amniotes) |
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Term
|
Definition
1. flight
2. temperature regulation
3. coloration |
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Term
|
Definition
1. archeornithes (basal birds)
2. Neornithes: (a)extinct marine birds with teeth, (b) non-flying and (c) flying birds |
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Term
|
Definition
-evolved from reptiles
-endothermic |
|
|
Term
| derived mammalian characteristics |
|
Definition
-synapsid skull
-hair
-mammary glands
-single dentary bone (lower jaw)
-3 inner ear bones
-diaphragm
-sweat glands
-heterodont teeth
-red blood cells
good smell |
|
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Term
|
Definition
1. prototheria (monotremes like platypus w/cloaca and no nipples)
2. theria (metatheria like marsupials and eutheria like everyone else) |
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