The Nautilina, proposed by Shimanskiy, is basically the Nautilaceae of Kummel, 1964, defined by Furnish and Glenister, but differs in omitting two families, the Paracenoceratidae and Pseudonautilidae which instead are placed in the Liroceratina.
Shimanskiy's proposed classification of the Nautilina is based on Kummel's 1964 work on the Nautilaceae but differs by excluding two families: Paracenoceratidae and Pseudonautilidae, which are now classified within the Liroceratina group.