Ok so..... having finally accepted that my big B annitha that I have had for years is not a B annitha because of the missing 'maple leaf' pattern on her carapace, everything got a little confusing again after my juvie B annitha moulted last week!
She had the 'maple leaf' pattern perfectly before the moult and now it's gone!!!!
Any ideas?

I think Scarab or Rock Spider might be able to help you with this dilemma,seeing as they have had or still have Brachypelma annitha Tarantula/s.