Vet World   Vol.10   May-2017  Article-6

Dactylogyrus barnae sp. n. (Platyhelminthes: Monogenoidea) infecting gills of Barilius barna Hamilton, 1822 (Pisces: Cyprinidae) from a global biodiversity hotspot - Arunachal Pradesh (India)

Background and Aim: This study was a part of an ongoing parasitological survey to investigate the health status of hill stream fish in river systems of Arunachal Pradesh - A global biodiversity hotspot.

Materials and Methods: During the 2013/2015, 18 live specimens of Barilius barna (Cyprinidae) were captured from the local rivers of Arunachal Pradesh and examined for parasitic monogenoids. These fish, with their flatworms, were immediately fixed in hot (60°C) 4% formalin for later examination. Identification and morphometric description used in this study followed Gussev (1976). Type specimens were deposited in the British Natural History Museum, UK.

Results: Dactylogyrus barnae sp. n. is described and illustrated from specimens of B. barna (Hamilton, 1822) from Arunachal Pradesh, India. The new species is characterized by a combination of the following characters: Copulatory tube coiled in 1½ counterclockwise rings, vagina consisting of a vaginal tube and vaginal pore, a complex sclerotized plate of unknown function in between male copulatory organ and vagina, and an anteromedial knob-like process on the dorsal bar.

Conclusion: D. barnae sp. n. is the fourth species of Dactylogyrus described from the Northeast India and brings the total number of species of Dactylogyrus in Indian waters to 56. B. barna represents a new host record for Dactylogyrus spp., and possibly the first report for any parasite. Keywords: Arunachal Pradesh, Barilius barna, Dactylogyrus barnae sp. n., monogenoidea, sclerotized plate.

Keywords: Arunachal Pradesh, Barilius barna, Dactylogyrus barnae sp. n., monogenoidea, sclerotized plate.

How to cite this article: Wangchu L, Narba D, Yassa M, Tripathi A (2017) Dactylogyrus barnae sp. n. (Platyhelminthes: Monogenoidea) infecting gills of Barilius barna Hamilton, 1822 (Pisces: Cyprinidae) from a global biodiversity hotspot - Arunachal Pradesh (India), Veterinary World, 10(5): 505-509.

Received: 30-12-2016  Accepted: 31-03-2017     Published online: 10-05-2017

Corresponding author: Leki Wangchu   E-mail: lekiwangchuk7@gmail.com

DOI: 10.14202/vetworld.2017.505-509

Copyright: Wangchu, et al. This article is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http:// creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.