|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||Impressions in form of asteroids or ophiuroids, with transversely sculptured arms; their striae produced by activity of digging tube feet; often intersected by traces of neighboring animals (“horizontal repetition”) or (as reaction to rapid sedimentation) “vertical repetition”; morphology dependent on preservation as convex hyporelief or concave epirelief.|
|D. Knaust and C. Neumann 2016||Star-shaped, commonly pentamerous imprints and shallowly excavated pits with arms grading from a central area and continuously tapering distally (emended after Seilacher, 1953).|