The vertebrate fauna of the Upper Permian of Niger—VII. Cranial anatomy and relationships of Bunostegos akokanensis (Pareiasauria) Linda A. Tsuji, Christian A. Sidor, J.- Sébastien Steyer, Roger M. H. Smith, Neil J. Tabor & Oumarou Ide Pages 747-763 | Received 31 May 2012,...