|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.
|J. Vinther et al. 2017||Elongate sachitid bearing a single, large subquadratic anterior shell plate with an anteriorly placed mucro. Dense dorsal covering of fine, hollow, spinose sclerites with inconspicuous morphological zonation. Shell plate largely covered by the mantle and sclerites|