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Table 1 Presence of the mandibular duct and type of insertion of both levator anguli oris (LAO) and intermandibularis posterior pars posterior (IPP) muscles in dissected species of the snail-eating dipsadine clade

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

Species Mandibular duct LAO insertion IPP insertion
Dipsas albifrons Present Anterior region of dentary Connected to the gland
Dipsas alternans Present Anterior region of dentary Connected to the gland
Dipsas brevifascies Absent Anterior region of dentary Parallel to the gland
Dipsas bucephala Present Anterior region of dentary Connected to the gland
Dipsas catesbyi Present Anterior region of dentary Parallel to the gland
Dipsas gracilis Present Anterior region of dentary Parallel to the gland
Dipsas incerta Present Anterior region of dentary Parallel to the gland
Dipsas indica Present Anterior region of dentary Connected to the gland
Dipsas neivai Present Anterior region of dentary Connected to the gland
Dipsas oreas Present Anterior region of dentary ?
Dipsas pakaraima Absent Anterior region of dentary Parallel to the gland
Dipsas pavonina Present Anterior region of dentary Connected to the gland
Dipsas peruana Present Anterior region of dentary Connected to the gland
Dipsas sanctijoannis Present Anterior region of dentary Parallel to the gland
Dipsas temporalis Absent Anterior region of dentary Parallel to the gland
Dipsas tenuissima Absent Anterior region of dentary ?
Dipsas variegata Present Anterior region of dentary Connected to the gland
Sibon annulatus Absent Infralabial gland Parallel to the gland
Sibon carri Absent Infralabial gland Parallel to the gland
Sibon dimidiatus Absent Infralabial gland Parallel to the gland
Sibon nebulatus Absent Infralabial gland Parallel to the gland
Sibon sanniolus Absent Infralabial gland Parallel to the gland
Sibynomorphus garmani Present Anterior region of dentary ?
Sibynomorphus lavillai Present Anterior region of dentary Connected to the gland
Sibynomorphus mikanii Present Anterior region of dentary Parallel to the gland
Sibynomorphus neuwiedi Present Anterior region of dentary Parallel to the gland
Sibynomorphus petersi Present Anterior region of dentary Connected to the gland
Sibynomorphus turgidus Present Anterior region of dentary Parallel to the gland
Sibynomorphus vagus Absent Anterior region of dentary Connected to the gland
Sibynomorphus ventrimaculatus Present Anterior region of dentary Parallel to the gland
Sibynomorphus williamsi Present Anterior region of dentary ?
Tropidodipsas fischeri Absent Infralabial gland Parallel to the gland
Tropidodipsas sartorii Absent Infralabial gland Parallel to the gland