Keywords: Aturia.png Characters of genus Aturia Cephalopoda Nautiloidea Nautilida a lateral view of a specimen with phragmocone and body chamber; b ventral view of a phragmocone with the sub-dorsal siphuncule visible on the last septum; c sutural line patterns U-umbilicus S-lateral saddle L-lateral lobe Normally visible portion of the sutural line highlighted in red Own 2008-10-26 Antonov Aturia |