Download Download
Total Page:16
File Type:pdf, Size:1020Kb
The Journal of Threatened Taxa (JoTT) is dedicated to building evidence for conservaton globally by publishing peer-reviewed artcles OPEN ACCESS online every month at a reasonably rapid rate at www.threatenedtaxa.org. All artcles published in JoTT are registered under Creatve Commons Atributon 4.0 Internatonal License unless otherwise mentoned. JoTT allows unrestricted use, reproducton, and distributon of artcles in any medium by providing adequate credit to the author(s) and the source of publicaton. Journal of Threatened Taxa Building evidence for conservaton globally www.threatenedtaxa.org ISSN 0974-7907 (Online) | ISSN 0974-7893 (Print) Short Communication A new fish species of genus Garra (Teleostei: Cyprinidae) from Nagaland, India Sophiya Ezung, Bungdon Shangningam & Pranay Punj Pankaj 26 May 2021 | Vol. 13 | No. 6 | Pages: 18618–18623 DOI: 10.11609/jot.6029.13.6.18618-18623 For Focus, Scope, Aims, and Policies, visit htps://threatenedtaxa.org/index.php/JoTT/aims_scope For Artcle Submission Guidelines, visit htps://threatenedtaxa.org/index.php/JoTT/about/submissions For Policies against Scientfc Misconduct, visit htps://threatenedtaxa.org/index.php/JoTT/policies_various For reprints, contact <[email protected]> The opinions expressed by the authors do not refect the views of the Journal of Threatened Taxa, Wildlife Informaton Liaison Development Society, Zoo Outreach Organizaton, or any of the partners. The journal, the publisher, the host, and the part- Publisher & Host ners are not responsible for the accuracy of the politcal boundaries shown in the maps by the authors. Member Threatened Taxa Journal of Threatened Taxa | www.threatenedtaxa.org | 26 May 2021 | 13(6): 18618–18623 ISSN 0974-7907 (Online) | ISSN 0974-7893 (Print) OPEN ACCESS htps://doi.org/10.11609/jot.6029.13.6.18618-18623 #6029 | Received 21 April 2020 | Final received 30 June 2020 | Finally accepted 15 May 2021 SHORT COMMUNICATION A new fsh species of genus Garra (Teleostei: Cyprinidae) from Nagaland, India Sophiya Ezung 1 , Bungdon Shangningam 2 & Pranay Punj Pankaj 3 1,3 Department of Zoology, Nagaland University, Headquarters: Lumami, Nagaland 798627, India. 2 Freshwater Fish Secton, Zoological Survey of India, 27 J.L. Nehru Road, Kolkata, West Bengal 700016, India. 1 [email protected], 2 [email protected], 3 [email protected] (corresponding author) Abstract: A species of the genus Garra is described from the Langlung Nagaland. It originates near New Jalukie, Peren District River, Brahmaputra basin, Nagaland, India. The new species is and fows through Zutovi Village, Dimapur, and joins distnguished from its congeners in having weakly-developed unilobed proboscis, a distnct transverse lobe with 8–12 small sized with Dhansiri River and fnally confuences into the unicuspid acanthoid tubercles, 30–32 lateral line scales, and 13–15 Brahmaputra. The river forms an ideal habitat for Garra. circumpeduncular scales. There are no prior reports of ichthyological exploratons Keywords: Garra langlungensis sp. nov., new species, northeastern of this river. India. A feld survey in the Langlung River, a tributary of Brahmaputra drainage in Nagaland, India included the collecton of seven undescribed Garra with a weakly- The members of the labeonine genus Garra Hamilton, developed proboscis and a transverse lobe on the snout. 1822 are elongated fsh that live in torrental rivers and The present paper deals with the formal descripton of streams. They are widely distributed from Sub-Saharan this species as Garra langlungensis sp. nov. Africa to Borneo through the Arabian Peninsula, southern Asia, and southern China (Zhang & Chen 2002). The Material and Methods species of Garra are diagnosed by the presence of a labial Samples were fxed in 10% formaldehyde and then fold forming a gular disc that displays variatons in the kept in 70% ethanol. All measurements were made snout (Kotelat 2020). Nebeshwar & Vishwanath (2017) using digital callipers, point to point on the lef side of divided the genus found in southern and southeastern the specimen closest to 0.1mm. Counts, measurements Asia into fve groups based on snout morphology: and terminology follow Nebeshwar & Vishwanath (2013). smooth, transverse lobe, proboscis, rostral fap, and the Gular disc terminology follows (Kotelat 2020). Dorsal and rostral lobe. anal fn rays follow Kotelat (2001). Lateral line scales were The Langlung River, also known as Atu Ghoki (meaning- counted from the anterior-most scale in contact with the stone River) is an important tributary of Dhansiri River in shoulder girdle to the posterior-most scale on the caudal ZooBank: urn:lsid:zoobank.org:pub:418DD67B-7207-4A2E-ADFF-CECB218FAF64 Editor: Anonymity requested. Date of publicaton: 26 May 2021 (online & print) Citaton: Ezung, S., B. Shangningam & P.P. Pankaj (2021). A new fsh species of genus Garra (Teleostei: Cyprinidae) from Nagaland, India. Journal of Threatened Taxa 13(6): 18618–18623. htps://doi.org/10.11609/jot.6029.13.6.18618-18623 Copyright: © Ezung et al. 2021. Creatve Commons Atributon 4.0 Internatonal License. JoTT allows unrestricted use, reproducton, and distributon of this artcle in any medium by providing adequate credit to the author(s) and the source of publicaton. Funding: (a) University Grants Commission, New Delhi; (b) ZoologicalSurvey of India, Ministry of Environment Forest and Climate Change,Government of India. Competng interests: The authors declare no competng interests. Acknowledgements: We are grateful to Kailash Chandra (ZSI) for permission to undertake the present study and to Waikhom Vishwanath, Manipur University for permission to examine type specimens under his care. We thanked Laishram Kosygin (ZSI) for support and encouragement. The frst author (SE) is grateful to the University Grants Commission, New Delhi for fnancial assistance for the award of UGC Non-NET fellowship, Nagaland University. The second author (BS) is thankful to Zoological Survey of India, Ministry of Environment Forest and Climate Change, Government of India for the Post-Doctoral Fellowship. 18618 Garra langlungensis sp. nov. Ezung et al. J TT fn. Fin rays and number of scales were counted using pairs; rostral barbel anteroventrally located, shorter than Huvitz stereo zoom microscope. Numbers in parentheses eye diameter; maxillary barbel at the corner of the mouth, following meristc data indicate the number of specimens shorter than rostral barbel. Rostral cap well–developed, with that count. Head length and measurements of its distal margin highly fmbriate, papillate ventral surface body are expressed in percentage of standard length moderately wide; separated from upper jaw by deep (%SL); pelvic-anal distance in the percentage of vent- groove and laterally contnuous with the lower lip. Upper anal distance; subunits of the head in the percentage of jaw entrely covered by the rostral cap. Disc elliptcal, head length (%HL); caudal peduncle depth in the percent shorter than wide and narrower than head width through of caudal peduncle length. Examined specimens are roots of maxillary barbel; labellum of lower lip distnct; deposited in the Zoological Survey of India (ZSI), Kolkata. torus well developed with papillae, not covered by the rostral cap; toral groove between the posterior torus and Results pulvinus deep; papillae on inner half of the whole length Garra langlungensis sp. nov. of labrum larger and coarsely arranged; anterior marginal (Images 1 & 2) surface of pulvinus with coarsely arranged feshy papillae; urn:lsid:zoobank.org:act:4C8A5C5E-0093-4BDA-B269-A72C833C0849 posterior most margin of labrum extending vertcal to eye. Dorsal fn with two simple and 8½ branched rays; Holotype: ZSI FF7152, 13.i.2017, 54.9mm SL, India, distal margin concave; origin nearer to snout tp than Nagaland, Langlung River near Zutovi Village, Dimapur to caudal-fn base, inserted anterior to vertcal through District, Brahmaputra Basin; 25.7160N, 93.6500E, collected pelvic-fn origin. Pectoral fn with 1 simple and 11 (4) or by Ezung et al. 12 (3) branched rays, reaching beyond midway to pelvic- Paratypes: ZSI FF 8859, 6 exs, 54.8–70.2 mm SL, same fn origin; margin subacuminate. Pelvic fn with 1 simple data as holotype. and 7½ branched rays; second branched ray longest, reaching beyond midway to anal-fn origin, surpassing Diagnosis anus; origin closer to anal-fn origin than to pectoral-fn Garra langlungensis sp. nov., a member of the snout origin. Anal fn with 2 simple and 5½ branched rays; frst with proboscis species group, can be distnguished from branched ray longest, not reaching base of caudal fn; other members of this group in having the following distal posterior margin slightly concave, origin closer to combinaton of characters: weakly-developed unilobed caudal-fn base than to pelvic-fn origin. Vent closer to the proboscis, a distnct transverse lobe with 8–12 small sized anal-fn origin than to pelvic-fn origin. Caudal fn forked unicuspid acanthoid tubercles, 8–9 pre-dorsal scales, 30– with 10+9 principal caudal rays; upper lobe slightly longer; 32 lateral line scales and 13–15 circumpeduncular scales. tp of lobes pointed. Vent closed to the anal-fn origin than pelvic-fn origin. Lateral line complete, scales along lateral line 28 (3), 29 (2) or 30 (2) + 2 (7) on caudal-fn base. Transverse scale Descripton rows above lateral line scale 3½ (7); between lateral line Table 1 depicts morphometric and meristc data. and pelvic-fn origin 3 (7); between the lateral line to anal- Body elongate, laterally compressed, more towards the fn origin 3½ (7). Circumpeduncular scales 13 (3), 14 (2) caudal peduncle. Dorsal head profle rising gently over or 15 (2). Pre-dorsal scales 8 (4) or 9 (3); scales regularly the snout, slightly convex, more or less contnuous with arranged. Chest and belly with well-developed scales. dorsal body profle to dorsal-fn origin, then gently sloping One long axillary scale at the base of the pelvic fn, its tp towards caudal peduncle. Ventral profle from head to reaching the posterior end of pelvic-fn origin. Dorsal-fn chest straight and profle from chest to anal-fn origin base scales 7 of which last three to four connected to the more or less convex.