|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.
|J. R. Laurie 1986||Sclerites high, with prominent apices and radial plicae. Concentric ornament of evenly and closely spaced carinate ribs, triangular to semiovate in section with a very fine, delicate, concentrically attenuated, reticulate micro-ornament superimposed. Form A sclerites ovate to subrectangular in section with moderate to strong curvature. There are two sclerite types: AI sclerites have no plicae on the face toward which the apex curves. Type All sclerites have two plicae on this face.
Form B sclerites subovate in section. There are two sclerite types: Type BI which is relatively low, subconical with moderate to strong curvature; Type BII which is high, subconical with curvature weak or absent.
Form C sclerites subtriangular to subcrescentic in section, curvature moderate to strong, torsion absent to slight. There are two sclerite types: Type CI which is high, subcrescentic with moderate to strong curvature, slight torsion; Type CII which is high, subtriangular in section with moderate to strong curvature, slight torsion.