Noritoidea

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

Noritoidea, 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.

The Hedenstroemiidae, less the Lanceolitinae, have been combined with middle and upper Triassic late derivatives of the Medlicottiadae, the Sageceratidae, in what is known as the Sageceratceae.

Sageceras, type genus of the Sageceratidae, is described as having lenticular shells with flattened bicarinate venters and small umbilici.

Hedenstroemiidae are described as having discoidal, compressed, generally smooth, involute shells with tabulate to oxynote[check spelling] venters.