Guyanan or Guyanese???

[Linds]

Which one is proper terminology for these boas originating from Guyana? Or are they both correct?

[JKS]

When it comes to Boas I've seen more refered to as Guyanan.

I believe that both terms are correct though.
When refering to something from Guyana, things can be refered to as either Guyanan or Guyanese.