MAJOR ARTICLE TAPROBANICA, ISSN 1800–427X. April, 2020. Vol. 09, No. 01: pp. 83–102, pls. 30–36. © Research Center for Climate Change, University of Indonesia, Depok, Indonesia www.taprobanica.org urn:lsid:zoobank.org:act:B2B21840-6D3C-46F4-A1D6-61EFFFB048DD A NEW SPECIES OF Dendrelaphis BOULENGER, 1890 (REPTILIA: COLUBRIDAE) FROM THE WET ZONE OF SRI LANKA WITH A REDESCRIPTION OF Dendrelaphis bifrenalis (BOULENGER, 1890) Section Editor: Ivan Ineich Submitted: 29 February 2019, Accepted: 05 May 2020 A. Dineth Danushka1, A. Suneth Kanishka1, A.A. Thasun Amarasinghe2,4, Gernot Vogel3 & Sampath S. Seneviratne1 1 Laboratory for Molecular Ecology and Evolution, Department of Zoology & Environment Sciences, Faculty of Science, University of Colombo, Colombo 03, Sri Lanka 2 Research Center for Climate Change, University of Indonesia, Gd. PAU Lt. 8.5, Kampus UI, Depok 16424, Indonesia 3 Society for Southeast Asian Herpetology, Im Sand 3, D-69115 Heidelberg, Germany 4 Association of Asian Herpetology (Asosiasi Herpetologi Asia), Jl. BSD Bintaro No. 88, Pondok Aren 15228, Tangerang Selatan, Indonesia 2 Corresponding author. E-mail:
[email protected] Abstract Examination of the Dendrelaphis bifrenalis populations on Sri Lanka showed that there are two populations that are morphologically different from each other. One population is distributed only in the wet zone forests (hereafter treated as wet zone population), while the other population occurs widely in the dry zone and intermediate zones (hereafter dry zone population). The type series of D. bifrenalis consist of 3 specimens from which the specimen representing the dry zone population was chosen as lectotype, and the wet zone population is described here as a new species.