2006  Ehiro::261, fig.2a-d.

Holotype: IGPS no.109698.

Large-sized Stacheoceras with subparallel sides and subrectangular cross section in mature state. Suture most advanced.
Stacheoceras iwaizakiense, Timorites intermedium, Pseudogastrioceras, Araxoceras cf. rotoides, Vescatoceras japonicum, Dzulfoceras cf. furnishi.