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A new species of the congrid eel genus Ariosoma (Teleostei: Anguilliformes: Congridae) from the Southeast coast of India, Bay of Bengal

Published online by Cambridge University Press:  17 May 2024

Paramasivam Kodeeswaran Open the ORCID record for Paramasivam Kodeeswaran [Opens in a new window] ,
A. Kathirvelpandian ,
Anil Mohapatra Open the ORCID record for Anil Mohapatra [Opens in a new window]  and
T. T. Ajith Kumar
Paramasivam Kodeeswaran
Affiliation:
ICAR-National Bureau of Fish Genetic Resources, Lucknow, Uttar Pradesh – 226 002, India Faculty of Fisheries Science, Kerala University of Fisheries and Ocean Studies, Kochi – 682 506, India
A. Kathirvelpandian
Affiliation:
ICAR-National Bureau of Fish Genetic Resources, Lucknow, Uttar Pradesh – 226 002, India
Anil Mohapatra
Affiliation:
Estuarine Biology Regional Centre, Zoological Survey of India, Gopalpur-on-Sea, Ganjam, Odisha – 761 002, India
T. T. Ajith Kumar*
Affiliation:
ICAR-National Bureau of Fish Genetic Resources, Lucknow, Uttar Pradesh – 226 002, India
*
Corresponding author: T. T. Ajith Kumar; Email: ttajith87@gmail.com
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Abstract

A new species of congrid eel genus, Ariosoma is described here based on two mature female specimens collected from trawl by-catch landings at Thoothukudi fishing harbour, off Thoothukudi, Bay of Bengal. The new species can be easily distinguished from its congeners in having pre-anal length 48.7–49.1% TL; dorsal-fin origin just before pectoral-fin insertion; body bicoloured, pale brown dorsally and silvery white ventrally; preopercular portion dark; pectoral fin reddish with dark spot at the base; SO canal with six pores; pre-dorsal vertebrae 10–11; pre-anal vertebrae 61–64; total vertebrae 162–163. Further, the new species differs from all the congeners of Indian waters in having more total vertebrae, except A. albimaculatum (162–163 vs 129–153 in others; 161–164 in A. albimaculatum). The new species identity was also supported by molecular analyses using the mitochondrial COI gene and the result revealed that the new species is closely related to Ariosoma maurostigma and Ariosoma albimaculatum with a pair-wise genetic distance of 11.4% and 11.6% followed by A. melanospilos with 16.8%.

Keywords

A. gnanadossiBathymyrinaeBay of Bengalmolecular analysessystematics
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 104 , 2024 , e51
Copyright
Copyright © ICAR-National Bureau of Fish Genetic Resources, 2024. Published by Cambridge University Press on behalf of Marine Biological Association of the United Kingdom

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Footnotes

This article was registered in Zoobank under urn:lsid:zoobank.org:pub:98BAE7FA-18E2-45E7-ACE8-50C571552154.

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