Click on any of the main groups
in the outer circle, or any of a main group's subgroups in the inner circle for:
- a general description of that taxonomic group, as well as the
first and last known occurrences of organisms from that group in
the fossil record
- images of fossil organisms in that group
- links to subgroups, if any, with additional information and images
Choose from the
time period bar for:
- images of fossils from that time
period, from all taxonomic groupings
Select any combination
of taxonomic group, s-p-r (state, province or region) and time period in the menus below
the circle for:
- images of fossil organisms from a specific taxonomic group,
s-p-r and/or time period
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