Lycodon, Fitzinger, 1826

Nguyen, Tan Van, David, Patrick & Vogel, Gernot, 2024, Expanded description & range extension of Lycodon sidiki Wostl, Hamidy, Kurniawan & Smith, 2017 (Squamata: Colubridae), Zootaxa 5492 (4), pp. 563-581 : 575-576

We provide below a key to Lycodon species known from Sumatra, as follows:

1a. Midbody scale in 15 rows................................................................... L. subannulatus

1b. Midbody scale in 17 rows............................................................................... 2

2a. Tail one-third of total length; three outer rows of dorsal scales strongly keeled; ventrals keeled.............. L. albofuscus

2b. Tail max one-fifth of total length; three outer rows of dorsal sales smooth; ventrals not keeled......................... 3

3a. Loreal absent............................................................................... L. effraenis 3b. Loreal present....................................................................................... 4

4a. Dorsal body scales smooth, body brown, reticulated and blotched but without crossbands................... L. capucinus

4b. Medial rows of dorsal scales feebly keeled, body black with crossbands.......................................... 5

5a. Max SVL 650 mm in males, 555 mm in females, prefrontal not entering obit, cloacal plate undivided.............. L. sidiki

5b. Max SVL 815 mm in males, 810 mm in females, prefrontal entering obit, cloacal plate divided............... L. subcinctus