Calamariinae

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 : 18

Calamariinae

Key to Philippine genera.

1a. Internasal scales absent (fused to prefrontal scales) ( Fig. 27A ); dorsal body scales in 13 longitudinal rows at midbody.......................................... Calamaria (p. 20)

1b. Internasal scales present (distinct from prefrontal scales) ( Fig. 27B ); dorsal body scales in 15 longitudinal rows at midbody.................................. Pseudorabdion (p. 32)

Figures

FIGURE 27. Lateral view of head of (A) Calamaria gervaisii (KU 322329), (B) Pseudorabdion collaris (KU 315197). Prefrontal scales (green), internasal scales (purplish-gray).