What is "noritaceae"

Noritaceae is an extinct superfamily of cephalopods belonging to the Ammonite order Ceratitida.

The Noritaceae, defined by Karpinsky in 1889, combines ceratitids with "typically smooth, more or less discoidal shells with rounded or truncate peripheries and ceratitic sutures,...." Keeled or ribbed offshoots may have simpler or more complex sutures.