Psammophis trinasalis Werner 1902

Fork marked sand snake


Namibia, Botswana, Republic of South Africa, S Angola

Scientific Names

Nostril pierced between 3 nasals, upper posterior with a posterior prolongation; preocular 1 (rarely 2), in broad contact with frontal (very rarely separated); postoculars 2; temporals basically 2+2+3, but with frequent fusions ; supralabials 8 (very rarely 7 or 9), fourth & fifth (very rarely third & fourth or fifth & sixth) entering orbit; infralabials 10 (rarely 9 or 11), the first 4 (very rarely 3 or 5) in contact with anterior sublinguals; dorsal scales in 17-17-13 rows; ventrals 150-175; cloacal shield divided; subcaudals 84-128. Brandstätter (1995, Fig. 46, 47) has published SEM micrographs of a dorsal scale from NMZB 22482 from Botswana. (Broadley 2002)




Branch 1988 considered it a subspecies of P. leightoni. "The fork-marked sand snake, P. l. trinasalis, has the top of the head striped, 150-172 ventrals, and 84-102 subcaudals; it is found in E. Namibia, Botswana, OFS and Transvaal."

Chantelle Bosch (2015). Kalahari Sandsnake from Solitaire region, Namibia - the cutest little pose! Chantelle Bosch (2015). From Solitaire region, Namibia.
Chantelle Bosch (2015).  From Solitaire region, Namibia Picture by Meyer Wiese, Facebook group Snakes of Namibia, mARCH 2015.