Known distribution of topotypic Oligodon cinereus cinereus (yellow), Oligodon cattienensis (pink), Oligodon cinereus pallidocinctus (red) and other lineages of Oligodon cinereus sensu lato (see color matching in Fig. 3) in Indochina. Triangle icons denote specimens with only molecular data; square icons denote specimens with only morphological data; and round icons denote specimens with both molecular and morphological data. Stars/asterisks next to numbers indicate type localities. Localities: 1 Cambodia (without further specification, type locality of Oligodon cinereus); 2 Trapeang Chan, Kampong Chhnang Prov., Cambodia; 3 Kirirom NP, Kreang, Kampong Speu Prov., Cambodia; 4 Prey Lang WS, Stung Treng Prov., Cambodia; 5 Yok Don NP, Dak Lak Prov., Vietnam; 6 Bidoup – Nui Ba NP, Lam Dong Prov., Vietnam; 7 Cat Tien NP, Dong Nai Prov., Vietnam (type locality of Oligodon cattienensis); 8 Bu Gia Map NP, Binh Phuoc Prov., Vietnam; 9 Loc Bao forest, Lam Dong Prov., Vietnam; 10 Ma Lam Phan Thiet, Binh Thuan Prov., Vietnam; 11 Bien Hoa, Dong Nai Prov., Vietnam; 12 Ho Chi Minh city, Vietnam (type locality of Simotes violaceus pallidocinctus); 13 Pichrada Distr., Mondolkiri Prov., Cambodia; 14 Attapu, Attapu Province, Laos; 15 Dak Cheung, Sekong Prov., Laos; 16 Phong Nha – Ke Bang NP, Quang Binh Prov., Vietnam; 17 24 km W of Con Cuong, Nghe An Prov., Vietnam; 18 Chi Linh, Hai Duong, Vietnam; 19 Tam Dao NP, Vinh Phuc Prov., Vietnam; 20 Arakan Range (formerly ‘Rakhine Yoma Mountain Range’), Rakhine State, Myanmar; 21 Kalaw township, Shan State, Myanmar.