Lecture 19 Study Guide

Lecture 19 Study Guide - Lecture 19 Study Guide 1. How are...

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Lecture 19 Study Guide 1. How are living tetrapods related to each other? a. 4-limb animal b. Ancanthostega i. Outside of crown group ii. Not a true crown group tetrapod c. 2 lineages i. Lissamphibians ii. Amniota 2. What are lissamphibians? a. Salientia (Frogs) i. Urostyle 1. Fused tailbone ii. Characteristic hip structure 1. Long hip bone 2. Hip a. Hip is movable, rotatable i. Extra joint, higher jumping b. 4 limb segments i. Hip, thigh, leg, foot iii. Only upper jaw has teeth b. Caudata (Salamanders) i. Long tail, short limbs ii. Both upper, lower jaws 1. Have teeth iii. Short hip
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c. Gymnophiona (Caecilians) i. ii. Skull structure 1. Protruding muzzle structure d. Shared traits i. Pedicellate teeth 1. Pedicel and cusps separated ii. Tooth crowns bicuspid or multicuspid iii. Jugal absent 1. No cheek bone iv. Short rib 3. What is the fossil record of lissamphibians? a.
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Lecture 19 Study Guide - Lecture 19 Study Guide 1. How are...

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