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Coelognathus radiatus (BOIE, 1827)

IUCN Red List - Coelognathus radiatus - Least Concern, LC
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Higher TaxaColubridae, Colubrinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Radiated Ratsnakes, Copperhead Rat Snake, Copper-headed Trinket Snake
G: Strahlennatter
Chinese: 三索锦蛇 
SynonymColuber radiatus BOIE 1827
Coluber radiatus — SCHLEGEL 1837: 135
Coluber quadrifasciatus CANTOR 1839
Tropidonotus quinque CANTOR 1839
Coelognathus radiata — FITZINGER 1843
Elaphis radiatus — DUMÉRIL 1853
Plagiodon radiata — DUMÉRIL 1853
Compsosoma radiatum — DUMÉRIL, BIBRON & DUMÉRIL 1854: 292
Elaphis (Compsosoma) radiatum — BLEEKER 1857
Spilotes radiatus — GÜNTHER 1858
Elaphis radiatus — JAN 1863
Compsosoma radiatum — THEOBALD 1868: 45
Compsosoma radiatum — STOLICZKA 1870: 188
Compsosoma radiatum — MÜLLER 1880
Coluber radiatus — BOULENGER 1894: 61
Coluber (Compsosoma) radiatus — MÜLLER 1895: 203
Coluber radiatus — WALL 1908: 327
Elaphe radiata — BARBOUR 1912
Elaphe radiata — POPE 1929
Coelognathus radiatus — COCHRAN 1930
Elaphe radiata — SMITH 1943
Elaphe radiata — TAYLOR 1965: 721
Elaphe radiata — SCHULZ 1996: 219
Elaphe radiata — MANTHEY & GROSSMANN 1997: 344
Elaphe radiata — COX et al. 1998: 51
Elaphe radiata — LAZELL et al. 1999
Elaphe radiata — CHAN-ARD et al. 1999: 166
Coelognathus radiatus — GUMPRECHT 2000
Coelognathus radiatus — UTIGER et al. 2002
Elaphe radiata — ZIEGLER 2002: 231
Elaphe radiata — LAZELL 2002
Coelognathus radiatus — WINCHELL 2003
Coelognathus radiatus — GUMPRECHT 2003
Elaphe radiata — PAUWELS et al. 2003
Elaphe radiata — AO et al. 2004
Elaphe radiata — ZHAO 2006
Coelognathus radiata — ZIEGLER et al. 2007
Elaphe radiatus — MURTHY 2010
Coelognathus radiatus — WALLACH et al. 2014: 172
Coelognathus radiates — WANGYAL 2014 (in error)
Coelognathus radiates — NEPALI & SINGH 2019 (in error)
Coelognathus radiates — KHOERUNISA et al. 2021 (in error) 
DistributionIndonesia (Sumatra, Bangka, Borneo/Kalimantan, Java, Bali),
Malaysia (Malaya and East Malaysia); Borneo,
Burma (Myanmar),
Thailand (incl. Phuket),
Laos, Cambodia, Vietnam (Hoa Binh),
India (Tripura, Manipur, Meghalaya, Assam, Arunachal Pradesh [A. Captain, pers. comm.], Eastern Ghats, from Uttarakhand, Madhya Pradesh, Chhattisgarh, Orissa = Odisha, West Bengal, Sikkim, Bihar, Himachal Pradesh, Mizoram, Nagaland), Bangladesh, Nepal, Bhutan,
S China (Fujian, Yunnan, Guangxi, Guangdong, Hong Kong)

Type locality: Java (Boie, 1827)  
Reproductionoviparous 
TypesHolotype: RMNH (Leiden) 
DiagnosisDiagnosis: Large snakes reaching a length of two meters; a. transverse black occipital bar making a median angle; scales in 19 rows at midbody; last labial below eye touching temporals; scales keeled; snout twice as long as eye; loreal longer than high; a median yellow or yellow-brown line bordered by a black stripe on each side. (Taylor 1965: 721)


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CommentBehavior: diurnal.

Type species: Coluber radiatus BOIE 1827 is the type species of the genus Coelognathus FITZINGER 1843.

Synonymy: Kaiser et al. 2013 considered the generic name Euanedwardsserpens Hoser 2012 invalid and rejected its use instead of Coelognathus.

Distribution: Possibly in Bhutan (Lenz 2012). Not in Singapore or not established there (Figueroa et al. 2023). 
EtymologyThe species epithet, radiatus, comes from the Latin radiātus (perfect passive participle of radiō "to radiate, emit beams". It is an adjective that means "with rays" or "arranged radially". The reference is the "the copper-coloured head bears three radiating stripes extending below and behind the eye, and a dark band across the nape." 
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