Karim, T. S.; Adrain, J. M. (2022). The phylogenetic affinity of the Ordovician trilobites Agerina, Forteyaspis gen. nov., and related genera, with new and revised species from Canada and the United States. Canadian Journal of Earth Sciences. 59(3): 156-179.
The phylogenetic affinity of the Ordovician trilobites <i>Agerina</i>, <i>Forteyaspis</i> gen. nov., and related genera, with new and revised species from Canada and the United States