|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
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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||"Sclerites straight or curved, narrow, pyramidal, conical or prismatic, with subquadrate cross-section, with four prominent facets. External ornamentation absent or represented by longitudinal straight or curved ribs."|