TRILOBITES were among the many hard-bodied creatures that first appeared during the Cambrian Period. The rapid diversification of life at that time has been an enduring puzzle.

TRILOBITES Among famous groups of extinct organisms,  probably rank second only to the dinosaurs in fame.

VAUXIA GRACILENTA has a branching morphology, and is very common.

OTTAIA & LEANCHOILIA This specimen has two individuals of Ottoia and portions of at least three individuals of Leanchoilia. The specimen on the right has just the head, and shows the pair of peculiar appendages found on Leanchoilia.