Trilobita - Ptychopariida - Olenidae
Full reference: R. A. Fortey. 1974. The Ordovician trilobites of Spitsbergen. I. Olenidae. Norsk Polarinstitutt Skrifter 160:1-129
Parent taxon: Olenidae according to R. A. Fortey 1974
Sister taxa: Acerocare, Acerocarina, Aciculolenus, Angelina, Apoplanias, Beltella, Boeckaspis, Chekiangaspis, Ctenopyge, Highgatella, Huangshiaspis, Hypermecaspidinae, Hypermecaspis, Inkouia, Jujuyaspis, Leiobienvillia, Leptobenthos, Leptoplastides, Leptoplastinae, Neolenus, Oleninae, Olenus, Parabolina, Parabolinella, Parabolinina, Parabolinites, Paraplicatolina, Peltocare, Peltura, Pelturinae, Plicatolininae, Prohedinella, Protopeltura, Rhodonaspis, Saltaspis, Sphaerophthalmella, Sphaerophthalmus, Westergaardites, Westergardia, Wujiajiania
Subtaxa: Balnibarbi, Cloacaspis
Ecology: fast-moving low-level epifaunal carnivore