Macrocalamus jasoni GRANDISON, 1972

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Higher Taxa	Colubridae, Calamariinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies
Common Names	E: Jason's (Mountain) Reed Snake G: Jasons Riednatter
Synonym	Macrocalamus jasoni GRANDISON 1972: 88 Macrocalamus jasoni — MANTHEY & GROSSMANN 1997: 367 Macrocalamus jasoni — VOGEL & DAVID 1999 Macrocalamus jasoni — WALLACH et al. 2014: 417 Macrocalamus jasoni — QUAH et al. 2019
Distribution	West Malaysia (only known from the type locality) Type locality: On track below camp 5 at about 5888 ft, Gunong Benom, C. Pahang, W Malaysia = Mt Benom, 1770 m
Reproduction	oviparous
Types	Holotype: BMNH 1967.2283, a 760 mm female (J.A. Bullock, 9 April 1967).
Diagnosis	Diagnosis: Adult females reach 692 mm SVL, 752 mm TL. Body large, stout; head elongate, triangular, depressed, indistinct from neck; snout rounded; elongate loreal present; one preocular; one postocular; 1 + 2 temporals; eight supralabials, second, third and fourth touching loreal, fourth and fifth touching eye, seventh the largest; seven infralabials; 15 dorsal scales rows at midbody; dorsal scales smooth; ventrals 131– 133 (females); cloacal scale single; 19–22 subcaudals (females) (Grandison, 1972; Vogel & David, 1999).
Comment	This species is known only from three female specimens.
Etymology	Named after John Jason Gathorne-Hardy (b. 1968) whose father was involved with the Gunong Benom expedition (1967) during which the snake holotype was collected. Gathorne-Hardy originally trained as a zoologist and is now an artist (Beolens et al. 2011).
References	Beolens, Bo; Michael Watkins, and Michael Grayson 2011. The Eponym Dictionary of Reptiles. Johns Hopkins University Press, Baltimore, USA - get paper here Grandison, A.G.C. 1972. The Gunong Benom Expedition 1967. 5. Reptiles and amphibians of Gunong Benom with a description of a new species of Macrocalamus. Bull. Br. Mus. nat. Hist. (Zool.), London, 23: 45-101. - get paper here Manthey, U. & Grossmann, W. 1997. Amphibien & Reptilien Südostasiens. Natur und Tier Verlag (Münster), 512 pp. - get paper here Quah, Evan S H; Shahrul Anuar, Lee L Grismer, Perry L Wood, Siti Azizah Mohd Nor 2019. Systematics and natural history of mountain reed snakes (genus Macrocalamus; Calamariinae). Zoological Journal of the Linnean Society, 188: 1236 - 1276 - get paper here Vogel, G. & P. David 1999. A revision of the genus Macrocalamus (Serpentes: Colubridae), with description of a new species and a key to the genus. Raffles Bull. Zool., 47 (2): 309-332 - get paper here Wallach, Van; Kenneth L. Williams , Jeff Boundy 2014. Snakes of the World: A Catalogue of Living and Extinct Species. [type catalogue] Taylor and Francis, CRC Press, 1237 pp. Yaakob, Norsham Suhaina and Boo Liat Lim 2002. A new species of mountain reed snake, Macrocalamus gentingensis, from Genting Highlands, Pahang, Peninsular Malaysia. Hamadryad 27 (1):83-89 - get paper here
External links	IUCN Red List Google images

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