What is "romaniceras"

Romaniceras is an early Upper Cretaceous ammonite genus, (Cephalopoda, Ammonoidea), removed from the Acanthoceratinae to the Euomphaloceratinae.

The shell is rather evolute, whorl section circular to oval. Differs from Acanthoceras in having 9 or 11 rows of tubercles, of which the ventrolateral may be clavate {i.e. elongate). Ribs are strong and fairly close spaced.