Images for Chapter 7: Vertebrate Origins

What Chordates Are

Cephalochordates

Vertebrates

The Earliest Fishes

Figure 7.5 Hagfishes

Lampreys

Lower Cambrian fishes!

Ordovician fishes:

Heterostracans

Osteostracans

Forktails

The Evolution of Jaws

Acanthodians
Acanthodians

Placoderms

Cartilaginous Fishes (Sharks and Rays)

Bony Fishes

Actinopterygians (Rayfin Fishes)

Sarcopterygians (Lobefin Fishes)

NEAT STORY: The Fossil Fishes of Canowindra

Coelacanths

Lungfishes

Osteolepiforms Eusthenopteron Canadian Geological Survey.

Page last updated November 11, 2004

Links checked August 24, 2004.

Images for Chapter 8

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