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© Rune Midtgaard


Taxonomy of the family Homalopsidae
Bibliography of the genus Enhydris
Biodiversity of the family Homalopsidae








Genus
Enhydris

Asian Mud Snakes, River Snakes, Smooth-scaled Water Snakes, False Water Snakes

Asiatische Schlammnattern, Wassertrugnattern

Asiatiske Muddersnoge

1801 Enhydris Latreille in Sonnini & Latreille (type species: Enhydris cærulea Sonnini & Latreille 1802)
1830 Hypsirhina Gray (type species: Homalopsis aer Boie 1826; syn. Murphy & Voris 2014)
1836 Potamophis Cantor (type species: Potamophis lusingtonii Cantor 1836; syn. Murphy & Voris 2014)
Contents: 6 species, of which 3 (50.0%) are endemic.
Endemism: 0% 100%
Remarks: Previously included Dieurostus, Ferania, Homalophis, Hypsiscopus, Phytolopsis, Pseudoferania, Raclitia, and the species now placed in Gyiophis, Kualatahan, Mintonophis, Myrrophis, Subsessor, and Sumatranus.
Distribution: SE. Asia, W. Indonesia.
Reported from: Bangladesh, Bhutan, Brunei, Cambodia, India (Andhra Pradesh, Arunachal Pradesh, Assam, Bihar, Madhya Pradesh, Meghalaya, Nagaland, Odisha, Telangana, Tripura, Uttar Pradesh, Uttarakhand, West Bengal), Indonesia (Bangka, Belitung, Java, Kalimantan, Sumatra, Weh), Laos, Malaysia (Sarawak, West Malaysia [incl. Langkawi Archipelago, Seribuat Archipelago (incl. Tioman)]), Myanmar, Nepal, Singapore, Sri Lanka, Thailand, Vietnam.

Enhydris chanardi

Thai Mud Snake, (Chanard's Mud Snake, Chanard's Water Snake)

Thailändische Schlammnatter

Thailandsk Muddersnog

2005 Enhydris chanardi Murphy & Voris

Distribution: Thailand.


Enhydris enhydris

Striped Mud Snake, Rainbow Mud Snake, Rainbow Water Snake, Common Smooth Water Snake

Gestreifte Schlammnatter

Stribet Muddersnog

1799 Hydrus enhydris Schneider
Homalopsis enhydris Cantor 1847
Hypsirhina enhydris Duméril & Bibron 1854
Enhydris enhydris Barbour 1912
1802 Enhydris cærulea Sonnini & Latreille (Murphy 2007)
1802 Hydrus atrocaeruleus Shaw (Murphy 2007)
1803 Coluber pythonissa Daudin (Murphy 2007)
1826 Homalopsis aer Boie (Murphy 2007)
Coluber aer Eydoux & Gervais 1837
Hypsirhina aer Gray 1849
1836 Potamophis lusingtonii Cantor (Murphy 2007)
1839 Homalopsis olivaceus Cantor (Murphy 2007)
1842 Hypsirhina bilineata Gray (Smith 1943)
Hypsirhina enhydris bilineata Lampe & Lindholm 1902
1842 Hypsirhina furcata Gray (Murphy 2007)
1842 Hypsirhina trilineata Gray (Murphy 2007)
1875 Hypsirhina albolineata Morice (Murphy 2007)
1905 Helicops indicus Annandale (Smith 1943)

Remarks: Reports from New Guinea (e.g., Rooij 1917; Haas 1950; Whitaker, Whitaker & Mills 1982) are most certainly based on polylepis (Murphy 2007), and O'Shea (1996) did not include enhydris in his New Guinea checklist. An apparently overlooked population exists in Sri Lanka (Murphy 2007). A single record from Hong Kong is believed to have been an imported animal from Thailand (Murphy 2007). Other records from China are considered doubtful. Zhao & Adler (1993) and Murphy (2007) did not list the species for China. Presence in Singapore was recently confirmed (Lim & Rozario 2009). Presence in Sulawesi (e.g., Bosch 1985; Iskandar & Colijn 2001; Iskandar & Tjan 1996) needs confirmation, since only a few voucher specimens are available from the island (Lang & Vogel 2005).
Distribution: Bangladesh, Bhutan, Brunei, Cambodia, India (Andhra Pradesh, Arunachal Pradesh, Assam, Bihar, Madhya Pradesh, Meghalaya, Nagaland, Odisha, Telangana, Tripura, Uttar Pradesh, Uttarakhand, West Bengal), Indonesia (Bangka, Belitung, Java, Kalimantan, Sumatra, Weh), Laos, Malaysia (Sarawak, West Malaysia [incl. Langkawi Archipelago, Seribuat Archipelago (incl. Tioman)]), Myanmar, Nepal, Singapore, Sri Lanka, Thailand, Vietnam.


Enhydris enhydris
© Rune Midtgaard

Enhydris innominata

Tay Ninh Mud Snake, Mekong Delta Water Snake, Black-spotted Water Snake, (Morice's Water Snake)

Tay-Ninh-Schlammnatter

Tay Ninh-muddersnog

1875 Hypsirhina innominata Morice
Enhydris innominata Smith 1929

Remarks: Currently regarded as monotypic, but previously included the subspecies smithi, now regarded as a synonym of jagorii. Reports from Thailand (Gyi 1970) are probably based on misidentified jagorii (Murphy 2007).
Distribution: Cambodia, Vietnam.


Enhydris jagorii

Bangkok Mud Snake, (Striped Water Snake, Jagor's Water Snake)

Bangkok-Schlammnatter

Bangkok-muddersnog

1863 Hypsirhina jagorii Peters
Enhydris jagorii Smith 1943
1914 Hypsirhina smithi Boulenger (Murphy 2007)
Enhydris smithi Smith 1929
Enhydris innominata smithi Saint Girons 1971

Remarks: This species is now restricted to Bangkok and its surroundings, although there is also a single record from Hua Hin, about 200 km south of Bangkok (Murphy 2007). Previously (e.g., Smith 1943; Gyi 1970) included populations now referred to subtaeniata. Records from elsewhere in Thailand, Cambodia, Laos, and Vietnam, refer to subtaeniata (Murphy 2007; Nguyen, Ho & Nguyen 2009).
Distribution: Thailand.


Enhydris longicauda

Long-tailed Mud Snake, Long-tailed Water Snake

Langschwanz-Schlammnatter

Langhalet Muddersnog

1934 Hypsirhina longicauda Bourret
Enhydris longicauda Smith 1943
Enhydris innominata longicauda Saint Girons 1971

Remarks: Regarded as a subspecies of innominata by Iskandar & Clijn (2001).
Distribution: Cambodia.


Enhydris subtaeniata

Mekong Mud Snake, Indochinese Water Snake

Mekong-Schlammnatter

Mekong-muddersnog

1934 Hypsirhina enhydris subtaeniata Bourret
Enhydris subtaeniata Murphy 2007

Remarks: Previously regarded as a synonym of jagorii (e.g., Gyi 1970). Revalidated by Murphy (2007).
Distribution: Cambodia, Laos, Thailand, Vietnam.