Taxonomy
The Noritaceae as revised (Tozer 1981) is composed of the Noritidae, Inyoitidae, Lanceolitidae, Ophiceratidae, Stephanitidae, Ussuriidae
Noritidae, not Noritidea, is the type family of the Noritaceae and may have been derived from the Dieneroceratidae through the Xenoceltitidae.
The Inyoitidae is based on the Inyoitinae which is removed from the Xenoceltitidae and elevated in rank. The Lanceolitidae, containing Lanceolites as the sole representative, was included in the Hedenstroemiidae as the Lanceolitinae.
The Ophiceratidae is removed from the Otocerataceae, the Stephanoceratidae from the Ceratitaceae. The Ussuriidae is a small family retained in the Noritaceae.
Read more about this topic: Noritaceae