Trilobita - Olenida - Olenidae
Full reference: R. A. Robison and J. Pantoja-Alor. 1968. Tremadocian trilobites from the Nochixtlan Region, Oaxaca, Mexico. Journal of Paleontology 42(3):767-800
Parent taxon: Olenidae according to R. A. Robison and J. Pantoja-Alor 1968
Sister taxa: Acerocare, Acerocarina, Aciculolenus, Angelina, Apoplanias, Asilluchus, Baikonuraspis, Balnibarbiinae, Bondarevites, Chekiangaspis, Ctenopyge, Cyclognathina, Euonchonotina, Eurycare, Hancrania, Helieranella, Highgatella, Huangshiaspis, Hypermecaspidinae, Hypermecaspis, Inkouia, Jujuyaspis, Leiobienvillia, Leptobenthos, Leptoplastinae, Leptoplastus, Lisania, Magnomma, Marjumia, Nericiaspis, Oleninae, Olenus, Parabolina, Parabolinella, Parabolinina, Parabolinites, Paraolenus, Paraplicatolina, Peltocare, Peltura, Pelturina, Pelturinae, Prohedinella, Protopeltura, Remizites, Rhodonaspis, Saltaspis, Sphaerophthalmella, Talbotinella, Ullaspis, Westergaardia, Westergaardites, Wujiajiania
Subtaxa: Plicatolina Plicatolinella
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Ordovician of Norway (1 collection)
• Tremadoc of Argentina (7), Bolivia (2), Mexico (2), United States (1: Vermont)
• Skullrockian of Argentina (1)
• Ibexian of Norway (1)
• Taoyuanian of the Russian Federation (6)
• Cambrian of Argentina (18), Australia (2), China (4), Kazakhstan (16), the Russian Federation (1), United States (1: Nevada)
Total: 63 collections including 64 occurrences