†order Asaphida Salter 1864 (trilobite)
Parent taxon: Libristoma according to A. Bignon et al. 2020
See also Adrain 2011, Fortey 1990, Hughes 1994 and Sepkoski 2002
Sister taxa: Ptychopariida, Trinucleida
Subtaxa: Aethodionide Anomocarellidae Anomocaridae Anomocaroidea Asaphina Asaphoidea Cyclopygoidea Dikelocephaloidea Eurekiidae Hungaiidae Ordosiidae Parabumasttides Pseudocyclopyge Remopleuridae Rhyssometopidae Trinucleoidea
Ecology: fast-moving low-level epifaunal carnivore