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Citation: Midtgaard, Rune. RepFocus - A Survey of the Reptiles of the World. (www.repfocus.dk).
Latest update: February 11th, 2024.

Taxonomy of the family Colubridae
Bibliography of the genus Trachischium
Biodiversity of the family Colubridae


Oriental Slender Snakes, Oriental Worm Snakes

Asiatische Wurmnattern

Asiatiske Ormesnoge

1898 Trachischium Günther (type species: Trachischium rugosum Günther 1858)
1924 Eminophis Werner (type species: Eminophis lineolata Werner 1924)
7 species, of which 2 (28.6%) are endemic.
Endemism: 0% 100%
Distribution: S. Asia.
Reported from: Bangladesh, Bhutan, China (Tibet), India (Arunachal Pradesh, Assam, Jammu & Kashmir, Meghalaya, Mizoram, Nagaland, Punjab, Sikkim, Uttarakhand, West Bengal), Nepal.

Trachischium apteii

Arunachal Pradesh Slender Snake


Arunachal Pradesh-ormesnog

2019 Trachischium apteii Bhosale, Gowande & Mirza

Remarks: Reported from China by Wang, Ren, Chen, Lyu, Guo, Jiang, Chen, Li, Guo, Wang & Che (2020), but the species has not actually been recorded from any Chinese-controlled areas. The inclusion of apteii in the work above is based on the fact that the distribution of the species is located in the part of Arunachal Pradesh, India, which is claimed by China and considered part of Tibet by the Chinese government (Kai Wang, pers. comm., January 6th, 2021).
Distribution: India (Arunachal Pradesh).

Trachischium fuscum

Darjeeling Slender Snake



1854 Calamaria fusca Blyth
Trachischium fuscum Günther 1860
1854 Calamaria obscuro-striata Blyth (Smith 1943)
1858 Trachischium rugosum Günther (Smith 1943)
1905 Ablabes gilgiticus Annandale (Smith 1943)
1924 Eminophis lineolata Werner (Smith 1943)

Remarks: Listed for Jammu & Kashmir by several authors (e.g., Kramer 1977; Murthy & Sharma 1976; Nanhoe & Ouboter 1987; Sharma & Sharma 1975; Smith 1943), but although this species was also reported from the state by Sahi & Duda (1985), it was not listed in a subsequent work by the same authors (Sahi & Duda 1996). It is unclear whether the authors intentionally removed the species from the state list in their latter work, but it is tentatively included here, since it does not seem unlikely that the species occurs in the state, having been confirmed for localities as close as in Uttarakhand.
Distribution: Bhutan, India (Arunachal Pradesh, Assam, Jammu & Kashmir, Sikkim, Uttarakhand, West Bengal), Nepal.

Trachischium guentheri

Rose-bellied Slender Snake, (Günther's Oriental Worm Snake)


Rosenbuget Ormesnog

1890 Trachischium guentheri Boulenger

Remarks: Presence in Nepal needs confirmation (Kästle, Rai & Schleich 2013).
Distribution: Bangladesh, Bhutan, China (Tibet), India (Sikkim, West Bengal).

Trachischium laeve

Olive Slender Snake

Olivfarbige Wurmnatter


1904 Trachischium laeve Peracca
1911 Trachischium quinquelabialis Wall (Smith 1943)

Remarks: Not mentioned for Punjab by Singh, Dutta & Singh (2021).
Distribution: India (Punjab, Uttarakhand), Nepal.

Trachischium monticola

Assam Slender Snake



1839 Calamaria monticola Cantor
Trachischium monticola Boulenger 1890
1870 Cyclophis rubiventer Jerdon (Smith 1943)
1875 Ablabes albiventer Günther (Smith 1943)

Distribution: Bangladesh, Bhutan, China (Tibet), India (Arunachal Pradesh, Meghalaya, Mizoram, Nagaland, West Bengal).

Trachischium sushantai

Jammu Slender Snake



2018 Trachischium sushantai Raha, Das, Bag, Debnath & Pramanick

Distribution: India (Jammu & Kashmir).

Trachischium tenuiceps

Orange-bellied Slender Snake


Orangebuget Ormesnog

1854 Calamaria tenuiceps Blyth
Trachischium tenuiceps Boulenger 1890

Distribution: Bangladesh, Bhutan, China (Tibet), India (Arunachal Pradesh, Sikkim, West Bengal), Nepal.