†Strettonia Cobbold 1931 (trilobite)
Trilobita - Corynexochida - Dorypygidae
Parent taxon: Dorypygidae according to P. A. Jell and J. M. Adrain 2003
Sister taxa: Atdabanella, Basocephalus, Bonnaria, Bonnia, Bonniella, Bonniopsis, Dorypygina, Dorypyginae, Fordaspis, Kooteniella, Mengzia, Ogygopsis, Olenoides, Protypus, Shipaiella
Subtaxa: Strettonia comleyensis
Type: Strettonia comleyensis
Ecology: nektobenthic carnivore