In other words, the scientists didn't know what they were talking about, as usual. Reminds me of the famous dinosaur skeleton that spent about 100 years in a museum with the head bone attached to the tail bone.
"What excites palaeontologists is the new-found diversity and complex evolutionary history of early mammals – a group previously known mostly from scattered teeth. More complete fossils have been very rare."
How much can they actually know from scattered teeth?