b112_Lecture_34b

b112_Lecture_34b - Class Amphibia ~4,000 extant species of...

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Class Amphibia ~4,000 extant species of frogs, salamanders & caecilians in 3 orders Believed to be derived from lobe-finned fishes Live in water & moist places, some breath through skin, others have lungs or gills Some go through metamorphosis (frogs) Eggs lack shells, fertilization mostly external Eggs left or tended by male or female, some ovoviparous or viviparous
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Order Urodela - Salamanders ~400 species Some entirely aquatic, other are terrestrial as adults or throughout life Tales retained as adults Walk in a side-to-side undulating fashion
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Ambystoma californiense – California Tiger Salamander
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Taricha granulosa – Rough-skinned Newt
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Notophthalmus viridescens – Eastern Newt Larva
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Batrachoseps attenuatus – California Slender Salamander
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Dicamptodon tenebrosus Pacific Coast Giant Salamander
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Necturus maculosus – Mudpuppy
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Order Anura Aquatic larva with gills, tail & lateral line system metamorphose to adults with no tail Sticky tongue for catching flies Skin often has distasteful or poisonous secretions Frog songs very species specific
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Hyla regilla – Pacific Treefrog Tadpoles
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Hyla arborea schelkownikowi – Common Tree Frog
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Rana aurora draytonii – California Red-legged Frog
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Rana catesbeiana – Bullfrog
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Bufo boreas – Western Toad
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Dendrobates lehmanni – Poison Arrow Frog, Columbia
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Poison Arrow Frog, Costa Rica
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b112_Lecture_34b - Class Amphibia ~4,000 extant species of...

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