English: Frill of Avaceratops lammersi (cropped from the original figure) using the following color-coding scheme (when applicable) for the epiparietal (ep), epiparietosquamosal (eps), and episquamosal (es) marginal ossifications:
M. A. Loewen, J. J. W. Sertich, S. Sampson, J. K. O'Connor, S. Carpenter, B. Sisson, A. Øhlenschlæger, A. A. Farke, P. J. Makovicky, N. Longrich & D. C. Evans
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Uploaded a work by M. A. Loewen, J. J. W. Sertich, S. Sampson, J. K. O'Connor, S. Carpenter, B. Sisson, A. Øhlenschlæger, A. A. Farke, P. J. Makovicky, N. Longrich & D. C. Evans from [https://doi.org/10.7717/peerj.17224 "''Lokiceratops rangiformis'' gen. et sp. nov. (Ceratopsidae: Centrosaurinae) from the Campanian Judith River Formation of Montana reveals rapid regional radiations and extreme endemism within centrosaurine dinosaurs"] with UploadWizard