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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: Colubrinae
Genus: Coelognathus
Species (7): C. enganensis – C. erythrurus – C. flavolineatus – C. helena – C. philippinus – C. radiatus – C. subradiatus

Coelognathus Fitzinger, 1843: 26

Type species: Coluber radiatus Boie, 1827, by original designation.

Primary references

Fitzinger, L. 1843. Systema Reptilium. Fasciculus primus. Amblyglossae. Braumüller et Seidel: Wien. vi + 106 pp. BHL Reference page.


Uetz, P. & Hallermann, J. 2022. Coelognathus . The Reptile Database. Accessed on 27 June 2021.

Vernacular names
Deutsch: Orientalische Rattennattern
English: Oriental Rat Snakes

Coelognathus is a genus of seven rat snakes from South and Southeast Asia that were formerly assigned to the genus Elaphe. Based on morphological evidence and protein similarities, in 2001, Helfenberger revalidated the name Coelognathus that had originally been proposed by Leopold Fitzinger in 1843.[1] The distinction between Coelognathus and Elaphe was further supported by mitochondrial DNA sequence and additional morphological evidence in 2005.[2]

These species are recognized:[3]

Coelognathus enganensis (Vinciguerra, 1892)
Coelognathus erythrurus (A.M.C. Duméril, Bibron & A.H.A. Duméril, 1854) – Philippine rat snake
Coelognathus flavolineatus (Schlegel, 1837) – yellow-striped rat snake
Coelognathus helena (Daudin, 1803) – trinket snake
Coelognathus philippinus (Griffin, 1909) – reddish rat snake
Coelognathus radiatus (F. Boie, 1827) – copperhead rat snake
Coelognathus subradiatus (Schlegel, 1837) - Indonesian rat snake

Nota bene: A binomial authority in parentheses indicates that the species was originally described in a genus other than Coelognathus.

Helfenberger N. (2001). "Phylogenetic relationships of Old World ratsnakes based on visceral organ topography, osteology, and allozyme variation". Russian Journal of Herpetology. 8: 1–62.
Utiger U, Schätti B, Helfenberger N (2005). "The Oriental colubrine genus Coelognathus Fitzinger, 1843, and classification of Old and New World racers and ratsnakes (Reptilia, Squamata, Colubridae, Colubrinae)" (PDF). Russian Journal of Herpetology. 12 (1): 32–53.[permanent dead link]

"Coelognathus ". The Reptile Database.

Further reading

Fitzinger L. 1843. Systema Reptilium, Fasciculus Primus, Amblyglossae. Vienna: Braumüller & Seidel. 106 pp. + indices. (Coelognathus, new genus, p. 26). (in Latin).


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