†Pachydiscoceras Zhao and Liang 1966 (ceratite)
Cephalopoda - Ceratitida - Pseudotirolitidae
Parent taxon: Pseudotirolitidae according to D. Korn 2006
Sister taxa: Chaotianoceras, Dushanoceras, Pernodoceras, Pseudotirolites, Schizoloboceras, Trigonogastrites
Subtaxa: Pachydiscoceras changhsingense, Pachydiscoceras ellipticum, Pachydiscoceras flexoplicatum, Pachydiscoceras obesum
Ecology: nektonic carnivore