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These are the lecture slides of Biology. Key important points are: General Features, Earliest Groups, Neural Crest, Origin of the Craniates, Gnathostomes, Come Jaws, Appendages, Lateral Lines, Lungs, Swim Bladders
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Chapter 34
Figure 34.2 Chordate characteristics
Figure 34.4a Subphylum Cephalochordata: lancelet anatomy
Pikaia , the Burgess-shale chordate, with evident somites
Chapter 34
Figure 34.1 Clades of extant chordates
Figure 34.9 A hagfish
A skull of cartilage, but no jaw, no vertebrae
Chapter 34
Figure 34.11 Cartilaginous fishes (class Chondrichthyes): Great white shark (top left), silky shark (top right), southern stingray (bottom left), blue spotted stingray (bottom right)
Figure 34.12b Ray-finned fishes (class Actinopterygii): long-snouted sea horse
Figure 34.13 Anatomy of a trout, a representative ray-finned fish
Figure 34.18 A coelocanth ( Latimeria ), the only extant lobe-finned genus
Chapter 34
