Help with Mantis ID

[Artsy Arthropod]

I recently acquired an unidentified mantis specimen from BioQuip bugs. I would appreciate any help with an ID! Two pictures are attached and the locality info is below.

Collection Info: Cameroon, Centre Province, Yaounde, August 2013.

Edit: I do know that it is a member of family Mantidae.

 

[avn]

I'm no expert but... Unicorn mantis?

 

[yen_saw]

It's a Sibylla sp.

 

[Artsy Arthropod]

Excellent, thank you very much!