|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Cephalopoda - Nautilida - Trigonoceratidae
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|S. Niko and R. H. Mapes 2007||Like Epistroboceras, but its flanks in adoral whorls are non-angulated because of the obsolescence of the ventrolateral grooves that are present in the earlier ontogenetic growth stages.|