Here are some search examples (URL-Entries):
Search in ARB-SILVA:
Search in EMBL:
Search the Web for full-name using google:
Search wikipedia for group- or species-name:
The URL in fact is an ´ARB Command Interpreter (ACI)´ expression. The name of the item (e.g. species or group) is used as input and can be accessed using the 'dd' command (as shown in the last example). That name contains the content of the first found field out of "group_name", "full_name" and "name".