Trouble on bothrops identification

[Feed'em All]

OK, here I come again...
I recently met a guy who sells all kind of bothrops ssp. CB and WC, and he claimed to have a WC bothrops ammodytoides (yarara ñata, Patagonian lancehead ). I have never seen this viper in person, just in a few really crappy pictures I found on the net.
This morning I went to his place to see the snake and I wasn't convinced that it was a Patagonian lancehead, but a hybrid ammodytoides x neuweidi.
As I have a friend who's desperate about getting a ammodytoides to complete his priv. collection on native hots I really wanna know what is the viper I saw
So, PLEASE, is anyone can post a decent picture of a patagonian lancehead, I will REALLY APPRECIATE it.
Thanks a lot, Martin.