†superfamily Trinucleoidea Hawle and Corda 1847 (trilobite)
Parent taxon: Asaphida according to J. M. Adrain 2011
Sister taxa: Aethodionide, Anomocarellidae, Anomocaridae, Anomocaroidea, Asaphina, Asaphoidea, Cyclopygoidea, Dikelocephaloidea, Eurekiidae, Hungaiidae, Ordosiidae, Parabumasttides, Pseudocyclopyge, Remopleuridae, Rhyssometopidae
Subtaxa: none
Type: Trinucleidae
Ecology: fast-moving low-level epifaunal carnivore
Distribution: there are no occurrences of Trinucleoidea in the database