Fig. 7 in Orthoceratoid and coleoid cephalopods from the Middle Triassic of Switzerland with an updated taxonomic framework for Triassic Orthoceratoidea

Fig. 7 Simplified time-scaled phylogeny demonstrating possible relationships of the Trematoceratidae to other orthoceratoids and coleoids. Note that Orthoceras and Michelinoceras are more closely related to coleoids than they are to trematoceratids under this concept. Several groups are omitted here for clarity (e.g., Nautilida, Ammonoida). The questionable Zhuravlevia is here excluded