Introduction to Amphibia

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This point represents one of the great events of vertebrate history: the development of four limbs in the common ancestor of all tetrapods
Where did tetrapods come from? 2 possible ancestors - Lung fish - Crossopterygian fish (Lobe-finned fish) 1. Lungfish ♦As the name implies lungs are present, as are modified fins ♦The heart is partly divided into a left and a right half as in true land vertebrates. South American Lungfish Life on land is possible, but…
Page 1 and 2: Introduction to Amphibia Frogo torp
Page 3 and 4: Amphibians in the fossil record ♦
Page 5 and 6: Amphibia: Life History and Ecology
Page 7 and 8: Why leave the water? Hynerpeton bas
Page 9: Tetrapods and The Move to Dry Land
Page 13 and 14: 2. Crossopterygian Fish ♦Had what
Page 15 and 16: Modern Coelacanth Early Amphibian
Page 17 and 18: Considered the most probable ancest

Introduction to Amphibia

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