Trilobita - Olenida - Olenidae
Parent taxon: Olenidae according to G. Henningsmoen 1959
Sister taxa: Acerocare, Acerocarina, Aciculolenus, Angelina, Apoplanias, Asilluchus, Baikonuraspis, Balnibarbiinae, Bondarevites, Chekiangaspis, Ctenopyge, Cyclognathina, Euonchonotina, Eurycare, Hancrania, Helieranella, Highgatella, Huangshiaspis, Inkouia, Jujuyaspis, Leiobienvillia, Leptobenthos, Leptoplastinae, Leptoplastus, Lisania, Magnomma, Marjumia, Nericiaspis, Oleninae, Olenus, Parabolina, Parabolinella, Parabolinina, Parabolinites, Paraolenus, Paraplicatolina, Peltocare, Peltura, Pelturina, Pelturinae, Plicatolininae, Prohedinella, Protopeltura, Remizites, Rhodonaspis, Saltaspis, Sphaerophthalmella, Talbotinella, Ullaspis, Westergaardia, Westergaardites, Wujiajiania
Subtaxa: Hypermecaspis
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Whiterockian of Canada (1: Newfoundland and Labrador collection), Norway (3)
• Chazyan of Canada (1: Newfoundland and Labrador)
• Arenig of Argentina (4), Australia (1), Bolivia (3), Norway (3), the United Kingdom (1)
• Arenigian of Argentina (10)
• Ordovician of Argentina (4), Bolivia (2), China (1), Norway (2), the Russian Federation (1), the United Kingdom (1), United States (3: Nevada)
• Ibexian of Norway (2), United States (1: California)
Total: 44 collections including 50 occurrences