Introduction to Amphibia

♦Dermal Bones - don’t match size, shape, or
positioning of modern amphibians
♦Limb structure - don’t have radius, ulna, humerus,
wrist, or fingers
♦Lack teeth in margins of the skull - found in first
amphibians
There are 3 living groups of
lungfish.
Their distribution suggests
that at some point the land
masses were linked together
Read web sections on Laurasia,
Gondwanaland and continental drift