Images for Chapter 5 The Cambrian Explosion

Animation of Continental Drift from 750 to 540 Mya

Ediacaran Animals

Rangeomorphs
A new concept by Guy Narbonne that many early Ediacaran animals were modular, consisting of frond-like structures that were grown in many different ways to yield many different-looking fossils, often large ones. However, they were all variations on a theme, so can be considered as an evolutionary group, the rangeomorphs. Their zoological affinities remain uncertain, though they are probably not outrageously different in an ecological sense from colonial creatures like many cnidarians.

The Beginning of the Cambrian

Larger Cambrian Animals

Arthropod leg. Figure 5.6.
Trilobites

Browse further for images at

The Burgess Fauna

The Chengjiang Fauna, Lower Cambrian, China

Burgess Shale Animals

Cnidarians

Worms

Sponges

Arthropods

Molluscs

Lobopods

Anomalocarids

Unknown groups: hyolithids