ammonites
Hypophiceras martini Trumpy 1969 (ceratite)

Cephalopoda - Ceratitida - Xenodiscidae

Belongs to Hypophiceras according to M. Q. Wang 1990

Sister taxa: Hypophiceras changxingense, Hypophiceras gracile

Ecology: nektonic carnivore

Average measurements (in mm): shell width 5.20, shell diameter 20.8