Hi Frank.
I have also thought maybe there is a lot of tristis tristis blood in the animal, but here in europe, there are only very few tristis tristis, so I have doubts that this animal contain most DNA from tristis tristis.
Maybe he is only 40CM because og the way he has been kept, that is likely.
But I also think the animal has very unique ocelli marking, somewhat different from both tristis tristis and t. orientalis.
He is though very beautiful.
Maybe he is a mix from tristis and orientalis, but I have to contact the breeder to get some more babies.
The ocelli marking resembles to those of the read-headed orientalis form. Which are also availible here in europe.
Would it be possible for you to post a few pics. of your tristis tristis.
cheers,
Rasmus