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. 2018 Mar 21;5(3):172337. doi: 10.1098/rsos.172337

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© 2018 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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Figure 4. — Lateral dermethmoids: (a) forming small nasal processes of the premaxilla, only partially surrounding the olfactory foramen, in ^†Ticinolepis longaeva, line drawing of the premaxilla of MCSN 8007; (b) forming large nasal processes of the premaxilla, enclosing the olfactory foramen, in Amia calva, reconstruction based on AMNH 90970 SD in [23]: fig. 42A; (c) forming toothed dermethmoids in ^†Siemensichthys macrocephalus, reconstruction based on [74]: fig. 145; (d) forming part of a compound mesethmoid with chondral and dermal components in ^†Tharsis dubius, reconstruction based on [74]: fig. 130a. Abbreviations: eco, ethmoidal commissure; fr, frontal bone; lde, lateral dermethmoid; le, lateral ethmoid; mes, mesethmoid; np, nasal process of the premaxilla; of, olfactory foramen; palt, foramen for terminal branch of palatine nerve; plp, postero-lateral process of lateral dermethmoid; rode, rostrodermethmoid.