|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Aculifera - Halkieriidae
It was assigned to Sachitida by Sepkoski (2002); to Halwaxida by Conway Morris and Caron (2007); and to Halkieriinae by Parkhaev and Demidenko (2010).
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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||"Small (up to 1 mm), shortened and widely triangular sclerites. Upper surface of sclerite convex, ornamented by longitudinal ribs. Lower surface flattened or concave, smooth. Lateral surfaces narrow. Sclerites straight or with S-like undulation due to downward bent of base and upward bent of distal end."|