Time Control

The age-window is currently set to: top=0Ma base=800Ma with normal taxa sorting


Choose the time period you want to focus on

Or, select top and bottom chronostrat units

Top unit
Base unit
Or, enter a precise age range (in millions of years):

Top of age range:
Base of age range:

What does this do?

Our system contains taxa from a wide range of geological time. So, if you are specifically interested in one time period - e.g. the present day, or Paleocene, or Early Cretaceous - then it will be easier if it is clear which taxa are present in that time interval. To do this, you can set an age-window using the tools above.

When an age-window is set

Other Preferences

OptionDefaultAlternative
Filenames: Do you want to display file names below images?
Sorting: Do you want to display granddaughter taxa that occur within the time control age-window at the top of lists?
Print mode: Do you want to display pages in a format more suitable for printing?
Number of taxa per page for catalog pages : 40
Number of images per table row (default 4):4
NB The left hand options are the recommended defaults.

Kill Fossils

This provides the option to focus the display on extant taxa.