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Type: Article
Published: 2022-10-05
Page range: 283-295
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Pethia dikhuensis (Teleostei: Cyprinidae), a new species from Nagaland, Northeast, India

Indian Council of Agricultural Research—Central Island Agricultural Research Institute (ICAR-CIARI), Port Blair, Andaman and Nicobar Islands, 744 101, India
Department of Zoology, Fazl Ali College, Mokokchung, Nagaland, 798 601, India
Ministry of Environment, Forest and Climate Change (MoEFCC), New Delhi—110 003, India
Dr.M.G.R. Fisheries College and Research Institute, Tamil Nadu Dr. J. Jayalalithaa Fisheries University, Ponneri, 601204, India
Department of Agriculture, Government of Nagaland, 798 601, India
Pisces Barbs Cypriniformes Pethia expletiforis Dikhu River Brahmaputra River

Abstract

A new species of Pethia from Nagaland, northeastern India is distinguished from all its congeners in the Ganges-Brahmaputra drainage, Kaladan drainage and the Chindwin- Ayeyarwady drainage by the following combination of characters: lateral line complete with 22–23 pored scales up to tail-fin base, 3rd and 4th lateral line scales with minute humeral spot, a large elliptical to rounded black blotch covering 16th to 18th, or 17th to 19th lateral-line scales; live male specimens with reddish-green body above lateral line and reddish-orange beneath; dorsal, pectoral, pelvic, anal and caudal fins reddish-orange; dorsal fin in both sexes with broad black submargin. Genetic analysis based on the mitochondrial cytochrome oxidase unit I (cox1) suggests that the species is distinct from other known species of Pethia for which data are available.

 

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