Trilobita - Phacopida - Pharostomatidae

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

Belongs to Pharostomina according to R. A. Robison and J. Pantoja-Alor 1968

Sister taxon: Colpocoryphoides trapezoidalis

Type specimen: USNM 158926, a cephalon/head (cranidium)

Ecology: fast-moving low-level epifaunal carnivore