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. 2025 Jun 18;12(6):250435. doi: 10.1098/rsos.250435

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© 2025 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Photographs (left side of panels) and rendered CT scans (right side of panels) of the right maxilla UMNH VP 16266 — Photographs (left side of panels) and rendered CT scans (right side of panels) of the right maxilla UMNH VP 16266.3 (Bolg amondol). (A) lateral view; (B) magnified view of osteoderms separated by grooves on the lateral surface of the nasal process; (C) medial view; (D) magnified view of the tooth-bearing surface, showing traces of basal enamel infoldings at the incomplete tooth base; (E) dorsal view; (F) anterior view; (G) posterior view. (H) Inferred placement of the element in a schematic reconstruction of the skull of Bolg amondol. Anatomical abbreviations: bei, basal enamel infoldings; frm, foramina; gr, grooves; lm, labial margin; nlf, nasolacrimal fossa; npr, nasal process; ost, osteoderms; spds, supradental shelf; tb, tooth base; tp, tooth position; tr, tooth row.