ADRAIN, J. M. ., and F. . PÉREZ-PERIS. “Middle Ordovician (Darriwilian) Cheirurid Trilobites from the Table Cove Formation, Western Newfoundland, Canada”. Zootaxa, vol. 5041, no. 1, Sept. 2021, pp. 1-73, doi:10.11646/zootaxa.5041.1.1.