Trilobita - Ptychopariida - 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: Plicatolininae according to R. A. Robison and J. Pantoja-Alor 1968

Sister taxon: Plicatolina

Subtaxa: Plicatolinella ocula

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Type: Plicatolinella ocula

Ecology: fast-moving low-level epifaunal carnivore