|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||"Hollow, wide, asymmetrical sclerites curved in crescent-like manner (especially in its middle part), with sharpen lateral sides. Sclerites narrow distally. One longitudinal fold runs along wide upper and sometimes along lower surfaces of sclerite. Fold divides upper surface of sclerite on two parts, i.e., one convex and another one concave. Sclerites externally smooth or bear indistinct transversal striation. Cros-section of sclerite in its proximal part rhomboidal or rounded rhomboidal. Distal end blind, rounded or pointed."|