Template:Geological category see also/doc

Usage
will automatically generate a see also list of two categories: one for the previous time span and one for the next.

For example, on Category:Jurassic animals, the template will generate:

The template auto-detects whether a category exists: if a category is missing, or there is no future or past time span, it will only list one category. e.g., on Category:Quaternary genera, the template will generate: