Abstract
Glyptothorax siangensis, new species, is described from the Siang River in Arunachal Pradesh, India. The new species can be distinguished from its congeners from the Ganga-Brahmaputra drainage and its neighbouring drainages by the following combination of characters: a thoracic adhesive apparatus with skin ridges present over almost the entire apparatus, including the sword-shaped median depression, which is narrowly opened posteriorly; an elongated dorsal spine distinctly greater than body depth at its origin, posteriorly serrated with 11–17 serrae; nuchal plate saddle-like with W-shaped extensions; shallow body depth; long nasal barbel, almost reaching the anterior margin of eye; a complete longitudinal black band across the distal half of dorsal-fin; and tips of neural spines extension visible as a row of ridges between dorsal-fin base and origin of procurrent rays of caudal-fin. This is the nineteenth species of Glyptothorax known from the Ganga-Brahmaputra drainage.
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ACKNOWLEDGMENTS
We are grateful to Dr. Dhriti Banerjee (Director, Zoological Survey of India, Kolkata, India) for valuable support and encouragement and to Prof. Waikhom Vishwanath (Manipur University, Imphal, India) for giving access to the types in the Manipur University Museum of Fishes. We also thank Shri Saresh Chandra Saren (Zoological Survey of India, Kolkata) for accompanying us on the field trip to Arunachal Pradesh and Shri. Rudra Chakraborty (Howrah, West Bengal, India) for taking photographs of the specimens and preparing the map. We are grateful to Dr. Achom Darshan (Manipur University, Imphal, India) for permitting us to use the image of Glyptothorax mibangi and Mr. Steven Grant, (England, United Kingdom) for reviewing the English language of the manuscript. This manuscript benefited from critical review by two anonymous reviewers.
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The study was conducted in accordance with the approval of the competent Authority of the Zoological Survey of India, Ministry of Environment, Forest & Climate Change, Government of India (Approval ID: F. 206-27/2021-22/Tech./15097 of November 15, 2021).
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Singh, P., Kosygin, L., Rath, S. et al. Glyptothorax siangensis, a New Species of Catfish (Sisoridae) from the Brahmaputra River Drainage, Arunachal Pradesh, India. J. Ichthyol. 63, 993–1004 (2023). https://doi.org/10.1134/S0032945223060152
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DOI: https://doi.org/10.1134/S0032945223060152