Xenochrophis trianguligerus

Superregnum: Eukaryota
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Cladus: Craniata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Classis: Reptilia
Cladus: Eureptilia
Cladus: Romeriida
Subclassis: Diapsida
Cladus: Sauria
Infraclassis: Lepidosauromorpha
Superordo: Lepidosauria
Ordo: Squamata
Subordo: Serpentes
Infraordo: Caenophidia
Superfamilia: Colubroidea

Familia: Colubridae
Subfamilia: Natricinae
Genus: Xenochrophis
Species: Xenochrophis trianguligerus
Name

Xenochrophis trianguligerus (Boie, 1827)
References
Links

Uetz, P. & Hallermann, J. 2021. Xenochrophis trianguligerus. The Reptile Database. Accessed on 10 October 2019.
Wogan, G. & Chan-Ard, T. 2012. IUCN: Xenochrophis trianguligerus (Least Concern). The IUCN Red List of Threatened Species 2012: e.T192034A2031113. DOI: 10.2305/IUCN.UK.2012-1.RLTS.T192034A2031113.en

Vernacular names
English: Red-sided Keelback Water Snake

The triangle keelback (Xenochrophis trianguligerus) is a species of snake found in Brunei Darussalam, Burma (Myanmar), Cambodia, India (Nicobar Islands; Arunachal Pradesh (Deban - Changlang district)), Indonesia (Nias, Mentawai, Sumatra, Laos, Malaysia (Malaya and East Malaysia), Singapore, Thailand, and Vietnam.

The type locality is Java.

Xenochrophis trianguligerus from Kaeng Krachan National Park.

Body close-up of X. trianguligerus, showing triangle marks.

Xenochrophis trianguligerus from East Borneo

References
Friedrich Boie 1827 Bemerkungen über Merrem's Versuch eines Systems der Amphibien, 1. Lieferung: Ophidier. Isis van Oken, Jena, 20: 508–566.
Bisby F.A.; Roskov Y.R.; Orrell T.M.; Nicolson D.; Paglinawan L.E.; Bailly N.; Kirk P.M.; Bourgoin T.; Baillargeon G.; Ouvrard D. (red.) (2011). "Species 2000 & ITIS Catalogue of Life: 2011 Annual Checklist". Species 2000: Reading, UK.