Daboia siamensis

Daboia siamensis (Common name: eastern Russell's viper,^[4] Siamese Russell's viper,^[5] more) is a viper species, which is endemic to parts of Southeast Asia, southern China and Taiwan.^[2][3] It was formerly considered to be a subspecies of Daboia russelii (as Daboia russelli siamensis), but was elevated to species status in 2007.^[2]

Daboia siamensis
Specimen from Thailand
Conservation status
Least Concern  (IUCN 3.1)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Squamata
Suborder:	Serpentes
Family:	Viperidae
Genus:	Daboia
Species:	D. siamensis
Binomial name
Daboia siamensis (M.A. Smith, 1917)[2]
Synonyms[3]
Vipera siamensis M.A. Smith, 1917 Coluber russelli siamensis — Ōshima, 1920 Vipera russelli limitis Mertens, 1927 Vipera russelli formosensis — Maki, 1931 Vipera russelii sublimitis Kopstein, 1936 Vipera russelii formosensis — Klemmer, 1963 Vipera russelii limitis — Klemmer, 1963 Vipera russelii siamensis — Klemmer, 1963 Viper russelli siamensis — Sakuragawa, 1979 Daboia (Daboia) russelli limitis — Obst, 1983 Daboia (Daboia) russelli siamensis — Obst, 1983 Vipera russelli siamensis — Nakada, Nakada, Ito & Inoue, 1984 Vipera russelli burmanus Muang Muang Aye In Gopalakrishnakone & Tan, 1987 Daboia russelli siamensis — Golay et al., 1993

Description

Dorsally, the color pattern is the same as that of D. russelii, except that the color is more grayish or olive, with small spots between the large spot rows. The venter is suffused with gray posteriorly.^[6]

Common names

Common names for D. siamensis include eastern Russell's viper and^[4] Siamese Russell's viper.

Previously, other common names were used to describe subspecies that are now part of the synonymy of this species: Indonesian Russell's viper for "limitis", and Formosan Russell's viper for "formosensis".^[5]

Geographic range

Daboia siamensis is found in Myanmar, Thailand, Cambodia, China(Guangxi Guangdong), parts of India, Taiwan, Nepal and Indonesia (Ende, Flores, east Java, Komodo, Lomblen Islands).^[3]

Brown (1973) mentions that D. siamensis can also found in Vietnam, Laos and on the Indonesian island of Sumatra.^[7] Ditmars (1937) reportedly received a specimen from Sumatra as well.^[8] However, its distribution in the Indonesian archipelago is still being elucidated.^[9]

Antivenom

As of 2016, antivenoms for Daboia siamensis were produced in India, Myanmar and Thailand.^[4]

• 
  Daboia siamensis in its habitat, in Thailand