English: Photographs of Websteroprion armstrongi. (a) Cluster ROM63122, holotype, bedding plane specimens preserved in dorso-ventral view as negative moulds (except for small black pieces of original jaw wall, see posteriormost tip of right MI); (b) Same specimen (ROM63122) flipped 180 degrees and with alternate lighting making the specimens appear positive (as an alternative to making peels with the risk of damaging the fragile specimens); (c–i) ROM63121; (c) Slab overview with white arrows indicating specimens enlarged in (d–i); (d) Part of cluster, note basal plate situated in bight of right MI (indicated by arrow); (e) Right MI in lateral view. (f) Fragmentary right MII in dorsal view and right(?) MI in ventro-lateral view; (g) Imprint of MII (next to MI in (d)); (h) Crushed maxillae; (i) Fang with cutting edge of right MI (same as in (e)); (j–n) ROM63120; (j) Slab overview with white arrows indicating specimens enlarged in (k–n); (k) Right MI; (l) Left MI; (m) Right MII in ventral view; (n) Unknown maxillae and to the right an anterior maxilla. Scale bars 1 mm except (c,j) 5 mm.