iDigBio is using an installation of MediaWiki to provide a robust wiki and feature set. Mediawiki is a well established product with loads of user submitted documentation. If you require help, please visit the following help pages via mediawiki.org:
Why not try out the wiki editor right now?
Click here to edit the Sandbox , a place to make test edits. (If there is already some text there, add to the end of the text.) Type some text. Click Show preview to test your changes, or Save page when you're happy with the way it looks.