Subclass Multiceratoidea Mutvei, 2013

Remarks

Herein, the classification of Pohle et al. (2022) is followed. The order Oncocerida Flower in Flower & Kummel, 1950 is rejected (but see supplementary data 1, and remarks in Methodology section), because it represents a paraphyletic group (Pohle et al. 2022). Below, families, previously classified within the Barrandeocerida or Oncocerida are listed alphabetically, without assigning them to an existing order.