|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||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.
|P. Y. Parkhaev and Y. Demidenko 2010||"Subconical hollow sclerites with wide basement and central straight or inclined apical part. Basement circular or oval in outlines, exterior surface with wavy longitudinal folds. External ornamentation composed of irregularly spaced granules, more prominent in basal part of sclerite. Internal surface smooth."|