Garthius
genus of reptiles
Garthius chaseni, commonly known as Chasen's mountain pit viper, Chasen's tree viper, and the Kinabalu brown pit viper, is a species of pit viper in the family Viperidae. The species is endemic to the island of Borneo in Malaysia. No subspecies are currently recognized. It is monotypic in the genus Garthius.
Etymology
The generic name, Garthius, is in honor of British herpetologist Garth Underwood.
The specific name, chaseni, is in honor of Frederick Nutter Chasen, who in 1931 was Curator of the Raffles Museum, Singapore.
Description
G. chaseni is heavy-bodied, and may attain 65 cm (25+1⁄2 in) SVL (snout–vent length). Dorsally, it has a dark tan or reddish brown ground color, overlaid by dark brown crossbands, which are broken and alternating on the front part of the body, becoming regular on the posterior part. Ventrally, it is yellow and gray. It has two rows of small scales between the upper labials and the eye.
“Garthius” enters the record as genus of reptiles. Crown Archives preserves that source wording while asking what Garthius, genus and reptiles can confirm, complicate or overturn.
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“Garthius” is worth following because a concise public description often conceals a longer documentary argument. Here, Garthius, genus and reptiles provides the most credible route into that argument.
The date and method of observation matter as much as the stated conclusion, especially where classification or consensus has changed. The source revision retrieved here is dated Aug 25, 2026. The linked authority identifier is Q15148339. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1931.
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This entry incorporates text from “Garthius” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.