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Citation: Midtgaard, Rune. RepFocus - A Survey of the Reptiles of the World. (www.repfocus.dk).
Latest update: December 31st, 2022.

Taxonomy of the family Cyclocoridae
Bibliography of the genus Cyclocorus
Biodiversity of the family Cyclocoridae


Triangle-spotted Snakes



1853 Cyclocorus Dumeril (type species: Lycodon lineatus Reinhardt 1843)
Contents: 2 species, both of which are endemic.
Endemism: 0% 100%
Remarks: Previously included in the family Colubridae. Transferred to the family Cyclocoridae by Weinell & Brown (2018).
Distribution: Philippines (Babuyan Islands [Calayan, Camiguin Norte], Caluya, Camiguin Sur, Camotes Islands [Pacijan], Catanduanes, Cebu, Inampulugan, Leyte, Lubang, Luzon, Marinduque, Masbate, Mindanao, Mindoro, Negros, Panay, Polillo, Samar, Siargao, Sulu Islands [Basilan], Tablas).

Cyclocorus lineatus

Northern Triangle-spotted Snake, (Reinhardt's Lined Snake)

Nördliche Triangelnatter

Nordlig Triangelsnog

1843 Lycodon lineatus Reinhardt
1870 Cyclocorus maculatus Jan (Iskandar & Colijn 2001)
1965 Cyclocorus lineatus alcalai Leviton

Other common names:
alcalai: Alcala's Northern Triangle-spotted Snake, Alcala's Triangle-spotted Snake
Remarks: Leviton, Siler, Weinell & Brown (2018) did not include Pacijan (Camotes Islands) and Masbate in the distribution of the species. Presence in Mindanao is regarded as questionable, although listed for the island by Alcala (1986), followed by Nuñeza, Ates-Camino & Alicante (2010).
Distribution: Philippines (Babuyan Islands [Calayan, Camiguin Norte], Caluya, Camotes Islands [Pacijan], Catanduanes, Cebu, Inampulugan, Lubang, Luzon, Marinduque, Masbate, Mindoro, Negros, Panay, Polillo, Tablas).

Cyclocorus nuchalis

Southern Triangle-spotted Snake

Südliche Triangelnatter

Sydlig Triangelsnog

1923 Cyclocorus nuchalis Taylor
Cyclocorus lineatus nuchalis Gaulke 1994
1965 Cyclocorus nuchalis taylori Leviton

Other common names:
taylori: Taylor's Southern Triangle-spotted Snake
Distribution: Philippines (Camiguin Sur, Leyte, Mindanao, Samar, Siargao, Sulu Islands [Basilan]).