|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
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.
|W. Hantzschel 1975||Very small or scooped hollows which form irregular main stem with unilateral pectinate branches comprised of very small leaf-shaped hollows also arranged unilaterally; systems are highly variable with many transitions between forms; limited to lobate configuration and thus resembling ammonite sutures; somewhat similar to Lophoctenium; endogenic and preserved exclusively in troughs of current ripple marks.|