Board Thread:The Panopticon/@comment-9435571-20130623083257/@comment-9435571-20130625003453

"We might be as well to assert that that Purebloods are descended from Sontara whereas the Kaveetch come from Sontar."

I don't really see how it would work. I think the intent of both stories was that Sontara/Sontar was the name of the Sontarans' original homeworld. And I don't see how they would be related to two races from different planets. Just because Daleks are said to be descended from Dals in one story and from Thals in another doesn't mean they're two different origins of Daleks, simply that the name was changed/retconned/forgotten between the stories.