Evolution of
Amphibians
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Ecology of
Amphibians
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Amphibian Group Evolutionary Branching Points
Rhipidistians
Igthyostegans
Tetrapods
Caecilians
Salamanders
Frogs and toads
Describe factors in the worldwide decline of amphibians and
explain how each factor affects the ability of amphibians to survive.
Local factors:
Effects:
Global factors:
Effects:
296 Fishes and Amphibians
Section 28.3 Amphibians (continued)
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
Main Idea Details
Compare amphibians with fishes. List some important
evolutionary advances seen in amphibians.
(^) SUMMARIZE
Identify the evolutionar y adaptations that make the branching
points for each amphibian group.