Typhlopidae, Merrem, 1820

Weinell, Jeffrey L., Hooper, Errol, Leviton, Alan E. & Brown, Rafe M., 2019, Illustrated Key to the Snakes of the Philippines, Proceedings of the California Academy of Sciences 66 (1), pp. 1-49 : 15-16

Typhlopidae

Key to Philippine genera.

1a. Posterior origin of nasal suture is preocular scale ( Fig. 21A ).......... Indotyphlops (p. 27)

1b. Posterior origin of nasal suture is the second supralabial scale ( Fig. 21B )............... 2 2a. Prefrontal scale much wider than rostral scale ( Fig. 22A )............ Acutotyphlops (p. 19)

2b. Prefrontal scale narrower than rostral scale ( Fig. 22B–C )............................ 3

3a. Rostral scale beaked ( Fig. 23A ).............................. Ramphotyphlops (p. 33)

3b. Rostral scale rounded ( Fig. 23B ).............................. Malayotyphlops (p. 29)

Figures

FIGURE 21. Lateral view of head of (A) Indotyphlops braminus (specimen number unknown; redrawn from Taylor 1922a), (B) Ramphotyphlops cumingii (EHT R-99; a redrafting by EH of original image in Taylor 1919). Second supral- abial scale (purplish-gray); preocular scale (green); nspo = nasal suture posterior origin scale.

FIGURE 22. Dorsal view of head of (A) Acutotyphlops banaorum (FMNH 262249; a redrafting by EH of original image in Wallach et al. 2007), (B) Malayotyphlops ruber (SMF 16616; a redrafting by EH of original image in Wynn et al. 2016), (C) Ramphotyphlops suluensis (PBS 2001; a redrafting by EH of original image in Taylor 1918). Prefrontal scale (green), rostral scale (purplish-gray). Fig. A reproduced and modified with permission of V. Wallach and Journal of Herpetology. Fig. B reproduced and modified with permission of A. Wynn and Journal of Herpetology.

FIGURE 23. Lateral view of head of (A) Ramphotyphlops marxi (FMNH 96520; a redrafting by EH of original image in Wallach 1993), (B) Malayotyphlops luzonensis (CM 2653; a redrafting by EH of original image in Wynn et al. 2016). Rostral scale (blue); arrow indicates either (A) beaked shape of rostral scale, or (B) rounded shape of rostral scale. Fig. A reproduced and modified with permission of V. Wallach and Journal of Herpetology. Fig. B reproduced and modified with permission of A. Wynn and Journal of Herpetology.