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. 2014 Mar 25;14:58. doi: 10.1186/1471-2148-14-58

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Copyright © 2014 Zaher et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Head muscles and glands of Dipsadinae. Lateral view of the head of Atractus major (IBSP 43395) (A), Adelphicos veraepacis (KU 187320) (B), and Geophis zeledoni (KU 63822) (C), showing location of the infralabial gland (il) with respect to the head muscles and mandible. Abbreviations: aem2, muscle adductor mandibulae externus medialis; aep, muscle adductor mandibulae externus profundus; aes, muscle adductor mandibulae externus superficialis; ap.aes, aponeurose of muscle adductor mandibulae externus superficialis; Hg, harderian gland; ipp, muscle intermandibularis posterior pars posterior; lao, muscle levator anguli oris; sl, supralabial gland. Scale bar in all pictures = 5 mm.