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Figure 2 | BMC Evolutionary Biology

Figure 2

From: Consuming viscous prey: a novel protein-secreting delivery system in neotropical snail-eating snakes

Figure 2

Head muscles and glands of Dipsadini. Ventral view of the head of Dipsas neivai (IBSP 54935) (A), Sibynomorphus ventrimaculatus (IBSP 17228) (B), Sibon nebulatus (AMNH 97068) (C), and Tropidodipsas sartorii (KU 157636) (D), showing the location of the infralabial gland (il) with respect to head muscles and mandible. Abbreviations: aes, muscle adductor mandibulae externus superficialis; ap.aes, aponeurose of muscle adductor mandibulae externus superficialis; il1, lateral, mucous infralabial gland; il2, ventrolateral, seromucous infralabial gland; ipp, muscle intermandibularis posterior pars posterior; lao, muscle levator anguli oris; sl, supralabial gland. Scale bar in all pictures = 2.5 mm.

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