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A new species of Kurixalus (Anura: Rhacophoridae) from northern Vietnam with comments on the biogeography of the genus
Authors:Tan Van Nguyen  Tang Van Duong  Kien Trung Luu
Institution:1. Department of Species Conservation, Save Vietnam’s Wildlife Center , Ninh Binh, Vietnam tan@svw.vn;3. Faculty of Biology, Department of Vertebrate Zoology, Moscow State University , Moscow, Russia;4. Vietnam National Museum of Nature, Vietnam Academy of Science and Technology , Hanoi, Vietnam;5. Department of Science and International Cooperation, Pu Mat National Park , Nghe An, Vietnam
Abstract:ABSTRACT

We describe a new species of rhacophorid frogs from Nghe An Province in northern Vietnam based on morphological and molecular evidences. Morphologically, Kurixalus gracilloides sp. nov. is distinguished from its congeners by a combination of the following diagnostic characters: body size small (snout–vent length 27.9–31.2 mm in males); head width subequal to head length; snout rounded with no dermal projection; canthus rostralis distinct, curved; vomerine teeth present; single internal vocal sac; iris golden-brown; small nuptial pad in finger I; dorsal surfaces golden-brown with a saddle-shaped dark marking; large dark spots on ventral surfaces absent; dermal fringes along outer edge of limbs; conical dermal appendage at the heel; skin on dorsum rough; skin on throat and chest granular; finger webbing rudimentary and toe webbing moderately developed, webbing formula I 2–2½ II 1½–3 III 1¾–3½ IV 3–1½ V. The new species is separated from all other congeners by uncorrected genetic distances ranging from 5.4% to 12.7% based on mitochondrial 16S rRNA gene. Phylogenetic analyses of mtDNA suggest that the new species is nested within a clade of Taiwanese and Yunnan Kurixalus with strong support values. The new species is currently known only from secondary bamboo forest in Pu Mat National Park, northern Vietnam, at elevations of 150 m asl. We suggest the new species should be considered as Near Threatened (NT) following the IUCN’s Red List categories.

http://www.zoobank.org/urn:lsid:zoobank.org:pub:C1BF843F-2F31-4CED-B1F9-13A9035C77C9
Keywords:Kurixalus gracilloides  sp  nov    Gracixalus  Pu Mat National Park  Nghe An Province  morphology  mtDNA  16S rRNA
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