Haikouichthys and Myllokunmingia were two vertebrates in the Cambrian Period
trilobites
It is thought that most of the animals in the Cambrian Period were herbivores feeding on the Green Algae which we believe was abundant during the Period.
Insects are the largest and most common invertebrate group.
To the Sourthern Hemisphere
cambrian
In the Cambrian period, the world's oceans were beginning to form because the glaciers were melting. Most of the world's land was in the Southern Hemisphere.
Most of the rock is pre-Cambrian rock.
Most of the rock is pre-Cambrian rock.
The sudden appearance of most of the major animal phyla within the fossils early in the Cambrian period. This caused a sudden diversification of life.
A good word to describe most of them would be recycled, by nature, via the rock cycle.
There were simple plants in the Cambrian Period(542 - 488.3Ma). Fossil algae has been found in Cambrian Rocks. Evidence of primitive algae from the Precambrian Super-Eon has also been found but exact classification has not been established. It is true that embryophytes (Plants we most recognise) did not evolve until the Ordovician Period(488.3 - 443.7Ma).
arthropods
First of all, the Cambrian Explosion is designated as a huge diversification event taking place between 543 to 506 MYA, when most of the phyla extant (living) today appeared. So the first chordates, shelled organisms and arthropods were seen in the Cambrian period. Therefore, complex bilateria dominated the Cambrian scene.