Figure 12 in A new Lower Permian trematopid (Temnospondyli: Dissorophoidea) from Richards Spur, Oklahoma

Figure 12. Atlas-axis complex and associated cervical vertebrae of Acheloma dunni, holotype (OMNH 73281) in A, right lateral view; B, left lateral view; C, anterior view. Abbreviations: at, atlas; axi, axial intercentrum; axn, axial neural spine; c3, third cervical vertebra; c4, fourth cervical vertebra; cr, cervical rib; pc, pleurocentrum. Scale bar = 10 mm.