A new species of mud snake (Squamata: Homalopsidae: Myrrophis) from southern Vietnam

Autor: Sang Ngoc Nguyen, Manh Van Le, Amy Lathrop, Thi-Dieu-Hien Vo, Robert W. Murphy, Jing Che
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Vertebrate Zoology, Vol 74, Iss , Pp 221-233 (2024)
Druh dokumentu: article
ISSN: 2625-8498
DOI: 10.3897/vz.74.e116992
Popis: Abstract Homalopsid snakes of the genus Myrrophis include only two species distributed in southern China and northern Vietnam. Here, we describe a third species from southern Vietnam based on morphological data and nucleotide sequences from the mitochondrial gene cyt b. Myrrophis dakkrongensis sp. nov. is diagnosed by the following morphological characters: Medium-sized mud snake (largest total length 452 mm); internasal single and distinctly separated from loreals; dorsal scales smooth, in 23 rows at midbody, reduced to 19 or 20 rows before vent; ventrals 133–138; subcaudals 34–42, paired; cloacal plate divided; supralabials 8, fourth entering orbit; second pair of chin-shields small and oblique; maxillary teeth 17 or 18; gland-like tubercles present in the cloacal region; hemipenis short, forked and spinose, reaching 7th subcaudal; dorsum dark brown to black; and a white or yellow to orange lateroventral stripe present. The new species differs from its congeners by an uncorrected p distance in cyt b sequences of at least 10.5%.
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