8-The_transition_to_land - The Transition to Land Sarcopterygii Part II Lec.8 Chap.11 DOF Assignment 1 Numerical Capitalize In grades are on-line common

8-The_transition_to_land - The Transition to Land...

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The Transition to Land: Sarcopterygii Part II Lec.8 – Chap.11 DOF
Assignment 1 Numerical grades are on-line Capitalize common names In text citations (author,yr). Make a poster Why did I ask you to use Catalog of Fishes
The Transition to Land: Sarcopterygii Part II Lec.8 – Chap.11 DOF
Acanthodi i Sarcopterygii Actinopterygii
Tetrapodamorphs (Sarcopterygii) Appeared with dipnoans in the Devonian, most disappeared by the end of the Permian Most were large predatory fishes (up to 4m) living in shallow freshwater habitats Had sarcopterygian features of having a jointed (kinetic) skull; lobed fins, and replacement teeth on the jaw margins
The transition to land. Why breath air?Why would limb bones be useful in the water?Why move on to land?Why did it take 100 my?
Fig 11.14 Eustenopteron Key traits that characterized the Sarcopterygian ancestors of tetrapods: an intercranial joint, arrangement of the dermal bones, axial elements of the pectoral fin skeleton.
Fig 11.15 (a) Eustenopteron ,(b) Ichthyostega ,(c) Neoceratodus

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