| Craspedocephalus trigonocephalus
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| Scientific classification
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| Kingdom:
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Animalia
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| Phylum:
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Chordata
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| Class:
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Reptilia
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| Order:
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Squamata
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| Suborder:
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Serpentes
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| Family:
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Viperidae
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| Genus:
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Trimeresurus
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| Species:
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T. trigonocephalus
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| Binomial name
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Trimeresurus trigonocephalus
(Donndorff, 1798)
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| Synonyms
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- Coluber capite-triangulatus Lacépède, 1789
- Col[uber]. Trigonocephalus Donndorff, 1798
- Vipera trigonocephala
– Sonnini & Latreille, 1801
- Trigonocephalus nigromarginatus Kuhl, 1820 (fide M.A. Smith, 1943)
- [Cophias] trigonocephalus
Merrem, 1820
- Trigonoceph[alus]. sagittiformis Schinz, 1822
- Megaera trigonocephala
– Wagler, 1830
- Megaera olivacea Gray, 1842
(fide M.A. Smith, 1943)
- Bothrops nigromarginatus
– A.M.C. Duméril, Bibron &
A.H.A. Duméril, 1854
- Trimeresurus trigonocephalus
– Günther, 1864
- Trimeresurus trigonocephalus
– M.A. Smith, 1943
- Lachesis trigonocephalus
– Boulenger, 1896
- Lachesis trigonocephala
– Boettger, 1898
- Trimeresurus capitetriangulatus
– Hoge & Romano-Hoge, 1981
- Trimeresurus trigonocephalus
– Golay et al., 1993
- Trimeresurus (Craspedocephalus) trigonocephalus – David et al., 2011
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Craspedocephalus trigonocephalus, the Sri Lankan pit viper, Ceylon pit viper, Sri Lankan green pitviper or locally, pala polonga, (Sinhala: පළා පොළඟා) is a venomous pit viper species endemic to Sri Lanka. No subspecies are currently recognized.