Keywords: Phragmoceras characters.PNG en characters of genus Phragmoceras a typical nautiloid of order Discosorida; a schematic lateral view of a shell; b oral view of a shell; c fossil specimen image from Manda S 2008 Bull Geosci ; 83 1 modified ; d ideal reconstruction in life position Own Antonov date Phragmoceras Illustrations of Cephalopoda fossils Nautiloidea fossils Cephalopoda anatomy |