New records and an updated checklist of snakes from Son La Province, Vietnam

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Abstract

Background

Son La Province is located in north-western Vietnam and the province contains a large area of 440,000 hectares of natural forest. A wide range of elevations and the complexity of landforms have given this province a great diversity of natural habitats and a high level of biodiversity potential. However, the snake fauna of Son La province is still poorly studied. Previous studies documented 56 species of snakes from this province.

New information

As a result of our field surveys in Phu Yen, Song Ma, Thuan Chau and Van Ho districts, we report five species of snakes for the first time from Son La Province, northern Vietnam, namely Boiga cyanea , B. guangxiensis , Lycodon meridionalis ( Colubridae ), Protobothrops cornutus and P. mucrosquamatus ( Viperidae ), with novel data about morphological characters. In addition, we provide an updated checklist of 61 snake species from Son La Province. The snake fauna of Son La Province also contains a number of species of conservation concern: 11 species listed in the Red Data Book of Vietnam (2007), four species listed in the IUCN Red List (2020) and four species listed in the Vietnam Governmental Decree No. 06 (2019).

Related collections

Most cited references 22

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A proposed standard system of counting ventrals in snakes.

HG DOWLING, G. Dowling H., H.G DOWLING … (1951)

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The IUCN Red List of Threatened Species. Version 2022-1

IUCN (2024)

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Three new species of the snake genus Achalinus from Vietnam (Squamata: Xenodermatidae)

THOMAS R. ZIEGLER, TRUONG QUANG NGUYEN, CUONG THE PHAM … (2019)

Three new species of the xenodermatid genus Achalinus are described from northern Vietnam based on morphological and molecular evidence: Achalinus juliani sp. nov. is characterized by a combination of the following characters: 1) maxillary teeth 28; 2) suture between the internasals distinctly longer than that between the prefrontals; 3) internasal not fused to prefrontal; 4) loreal not fused with prefrontal; 5) infralabials 6; 6) mental separated from anterior chin shields; 7) two elongated anterior temporals, in contact with the eye, and two posterior temporals; 8) dorsal scales in 25–23–23 rows, keeled; 9) ventrals 173–179; 10) subcaudals 77–91, unpaired; 11) a total length of at least 413 mm (with a maximum tail length of 109 mm, and a tail/total length ratio of 0.22–0.37); 12) dorsum in preservative reddish to greyish brown above, with the lower and posterior head sides being paler; venter greyish cream, with the underside of the tail being somewhat darker. Achalinus timi sp. nov. is characterized by a combination of the following characters: 1) maxillary teeth 27; 2) suture between the internasals distinctly longer than that between the prefrontals; 3) loreal fused with the prefrontal on each side, with the prefrontal extending towards the supralabials; 4) dorsal scales in 25–25–23 rows, keeled; 5) ventrals 170+1; 6) subcaudals 72, unpaired; 7) a total length of at least 177.9 mm in males (with a tail length of 37.9 mm, and a tail/total length ratio of 0.21); 8) dorsum in preservative reddish to greyish brown above, with wide portion of the vertebral region being distinctly darker; the lower head sides somewhat paler; infralabial and chin shields light greyish brown; venter greyish cream, with the underside of the tail being somewhat darker and the chin region somewhat paler. Achalinus emilyae sp. nov. is characterized by a combination of the following characters: 1) maxillary teeth 27 or 28; 2) suture between internasals distinctly longer than that between the prefrontals; 3) internasal not fused to prefrontal; 4) loreal not fused with prefrontal; 5) infralabials 5; 6) mental separated from anterior chin shields; 7) two anterior temporals, only the upper one in contact with eye, and two posterior temporals; 8) dorsal scales in 23–23–23 rows, keeled; 9) ventrals in females 157–161; 10) subcaudals in females 63, unpaired; 11) a total length of at least 519.5 mm (with a maximum tail length of 95.1 mm, and a tail/total length ratio of 0.18 in females); 12) dorsum iridescent pale yellowish brown with a dark longitudinal mid-dorsal stripe. In terms of pairwise genetic distance (cytochrome c oxidase subunit 1, COI), the three new species differ by at least 12.7% from other members of the genus, including themselves. The total number of Achalinus known is increased to twelve and the number of Achalinus species known from Vietnam is increased from three to six. Currently ten species of xenodermatids are known to exist in Vietnam: Achalinus ater, A. emilyae, A. juliani, A. rufescens, A. spinalis, A. timi, Fimbrios klossi, F. smithi, Parafimbrios lao, and P. vietnamensis.

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Author and article information

Contributors

Truong Quang Nguyen:

ORCID: https://orcid.org/0000-0002-6601-0880

Journal

Journal ID (nlm-ta): Biodivers Data J

Journal ID (iso-abbrev): Biodivers Data J

Journal ID (publisher-id): 1

Journal ID (index): urn:lsid:arphahub.com:pub:F9B2E808-C883-5F47-B276-6D62129E4FF4

Journal ID (aggregator): urn:lsid:zoobank.org:pub:245B00E9-BFE5-4B4F-B76E-15C30BA74C02

Title: Biodiversity Data Journal

Publisher: Pensoft Publishers

ISSN (Print): 1314-2836

ISSN (Electronic): 1314-2828

Publication date Collection: 2020

Publication date (Electronic): 17 June 2020

Volume: 8

Electronic Location Identifier: e52779

Affiliations

[1 ] Tay Bac University, Quyet Tam Ward, Son La City, Son La Province, Vietnam Tay Bac University, Quyet Tam Ward, Son La City Son La Province Vietnam

[2 ] AG Zoologischer Garten Köln, Riehler Straße 173, D-50735, Cologne, Germany AG Zoologischer Garten Köln, Riehler Straße 173, D-50735 Cologne Germany

[3 ] Institute of Zoology, University of Cologne, Zülpicher Street 47b, D–50674, Cologne, Germany Institute of Zoology, University of Cologne, Zülpicher Street 47b, D–50674 Cologne Germany

[4 ] Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Hanoi, Vietnam Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road Hanoi Vietnam

[5 ] Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Hanoi, Vietnam Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road Hanoi Vietnam

Author notes

Corresponding author: Truong Quang Nguyen ( nqt2@ 123456yahoo.com ).

Academic editor: Franco Andreone

Author information

Truong Quang Nguyen https://orcid.org/0000-0002-6601-0880

Article

Publisher ID: 52779 Publisher-manuscript ID: 13667

DOI: 10.3897/BDJ.8.e52779

PMC ID: 7314865

SO-VID: fc2b919c-e019-44bc-a013-84732cbcd7b9

License:

This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

History

Date received : 31 March 2020

Date accepted : 13 June 2020

Page count

Figures: 6, Tables: 1, References: 27

Funding

This research is supported by the Ministry of Education and Training (Grant No. CT.2019.06.05). Research of Truong Quang Nguyen is supported by the Vietnam Academy of Science and Technology (Project Code QTBY01.01/19-20).

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New records and an updated checklist of snakes from Son La Province, Vietnam

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Abstract

Background

New information

Related collections

Pensoft Biodiversity

Most cited references 22

A proposed standard system of counting ventrals in snakes.

The IUCN Red List of Threatened Species. Version 2022-1

Three new species of the snake genus Achalinus from Vietnam (Squamata: Xenodermatidae)

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