|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||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 2005||Species of Epistroboceras with width/height ratios of 0.75–0.83 and dorsally shifted umbilical angle in adoral whorl with umbilical zone height per whorl height ratios of 0.17–0.25; ventral platform relatively wide; ventral (hyponomic) sinus U-shaped; siphuncular position ratios (see the description for its definition) are 0.23–0.25.|