Fig. 2. Investigated orthoconic nautiloid specimen BSPG 2011 0002 in Exceptional cameral deposits in a sublethally injured Carboniferous orthoconic nautiloid from the Buckhorn Asphalt Lagerstätte in Oklahoma, USA

Fig. 2. Investigated orthoconic nautiloid specimen BSPG 2011 0002 from the Carboniferous Buckhorn Asphalt Quarry, Oklahoma, USA with nacreous shine and one of the marks on the conch (dorsal side of the phragmocone). In the middle of this mark a septum is visible (marked with an arrow).