The Riddellia system existed within the Albanin sector. This sector was situated inside the Slice region of the vast Outer Rim Territories. It served as the native habitat for the Riddellian blood-worms.
The system of Riddellia first appeared in the reference book The Essential Atlas, released in 2009. Daniel Wallace and Jason Fry authored this book, and it designated the system's location as grid square T-12.