Cerberus rynchops (Schneider, 1799)

(Figs. 7G, 11B)

Material studied: Two adults, CIARI uncatalogued from Sippighat, South Andaman (Fig. 4E).

Morphology: Dorsal scales strongly keeled; in 23:25:19 rows; ventrals 142–150; subcaudals 55–60, divided; supralabials 9 (none entering orbit); infralabials 10 (1–6 in contact with genials); preocular 1; postocular 1; suboculars 2; anal divided; loreal 1. Dorsal colouration grayish with dark blackish cross-bars; venter with grey, black and white checkered pattern.

Distribution: Several individuals were recorded in mangroves and mudflats along the coast in South, North and Middle Andaman, John Lawrance and Henry Lawrance, Havelock, Neil, Alexandra, Tarmugli, Redskin, Paget, North Reef, Interview, Kyd and Rutland Islands. One was seen in the rocky delta of a freshwater stream in Rutland near the coast.

Status: A commons species found throughout most of South and Southeast Asia (Murphy et al., 2012).