This is the latest that we know about the history of the Squartailboas.

They are in a direkt relationship to the line known as the "Kubsch-Pastel-Line".
They have the beautiful color of that dominant line plus the Arabesque like pattern 
and the squares in the tail.
The Squaretails are a result of selected breeding over more than 20 years.

Just by luck it seems we were able to acquire the breeding pair we now have. 
As far as we know these are the only pair being bred in the world today that consistently produces the combination of traits that we named "Squaretailboas"