†order Sachitida He 1980 (mollusk)
Synonyms: Halwaxida Conway Morris and Caron 2007, Halwaxiida Conway Morris and Caron 2007, Thambetolepida Jell 1981
Parent taxon: Aculifera according to Y. Oh et al. 2025
See also Conway Morris and Caron 2007, Kouchinsky et al. 2017, Parkhaev and Demidenko 2010, Sepkoski 2002 and Vinther et al. 2017
Sister taxa: Aplacophora, Halkieriidae, Inughuitoconus, Paleoloricata
Subtaxa: Adversella Australohalkieria Carubacgutes Halkierioidea Miriella Orthrozanclidae Quadrochites Sachitidae Siphogonuchitidae Siphogonuchitoidea Wiwaxia
Ecology: epifaunal grazer