Chapter 11.3 - Amphibians

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Amphibia• Greek: amphi = “both,”

bios = “life.” • Amphibians lead a

“________ _____”• What does this mean?

• ~400 mya amphibians evolved from ____.•Dry land area grew•Abundance of food (insects) on dry land increased•Certain fish began developing limbs to _____ and lungs to _____. •____________ were the 1st vertebrates to adapt to life on land• 7500 species today

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Anura Frogs and toads

CaudataSalamanders and newts

Apoda Caecilian worm-like animals that are found only in the tropics

• Do not lose their _____ like the anura.

• Many retain _____ for the rest of their lives

• Can be terrestrial or aquatic.

• Usually small, except the Chinese Giant Salamander has been documented at 5.9 ft!

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• Found only in the tropics • 160 species• rarest of amphibians• no limbs and look much like

earthworms• most live underground • some aquatic

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