Calamaria

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 : 20-21

Calamaria

Key to Philippine species.

1a. Mental scale not in contact with anterior chin shields ( Fig. 31A )...................... 2

1b. Mental scale in contact with anterior chin shields ( Fig. 31B )......................... 4

2a. Number of pair of subcaudal scales <30 (males), <25 (females)...................... 3

2b. Number of pair of subcaudal scales>40 (males),> 30 (females)........................................................... Calamaria sp. Mindoro (Weinell et al., in review )

3a. Number of pairs of subcaudal scales ≤ 21 (males), ≤ 14 (females)...... Calamaria virgulata

3b. Number of pairs of subcaudal scales 23–25 (males), 16–20 (females) Calamaria palavanensis

4a. Ventral surface of body with dark bands....................... Calamaria lumbricoidea

4b. Ventral surface of body without dark bands....................................... 5

5a. Dorsal surface behind head has 2–6 dark, black-edged crossbands..... Calamaria bitorques

5b. Dorsal surface behind head lacks dark, black-edged crossbands....................... 6

6a. Diameter of eye less than eye-mouth distance...................... Calamaria joloensis

6b. Diameter of eye equal to or greater than eye-mouth distance......................... 7

7a. Each dorsal body scale with a light network; a continuous light stripe on first row of dorsal body scales present............................................ Calamaria suluensis

7b. Each dorsal body scale above first row yellowish with a dark network; a dark-edged, interrupted, light stripe on first row of dorsal body scales usually present..... Calamaria gervaisii

Figures

FIGURE 31. Ventral view of head of (A) Calamaria palavanensis (KU 309445), (B) Calamaria gervaisii (KU 307983). Mental scale (blue), anterior chin shields (reddish brown), first infralabial scales (green).