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The morphology and genetic characterization of Iheringascaris goai n. sp. (Nematoda: Raphidascarididae) from the intestine of the silver whiting and spotted catfish off the central west coast of India
Malhotra, A.; Jaiswal, N.; Malakar, A.K.; Verma, M.S.; Singh, H.R.; Lakra, W.S.; Malhotra, S.K.; Shamsi, S. (2012). The morphology and genetic characterization of Iheringascaris goai n. sp. (Nematoda: Raphidascarididae) from the intestine of the silver whiting and spotted catfish off the central west coast of India. J. Helminthol. 86(3): 353-362. http://dx.doi.org/10.1017/S0022149X11000472
In: Journal of Helminthology. Cambridge University Press: London. ISSN 0022-149X; e-ISSN 1475-2697, meer
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| Auteurs | | Top |
- Malhotra, A.
- Jaiswal, N.
- Malakar, A.K.
- Verma, M.S.
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- Singh, H.R.
- Lakra, W.S.
- Malhotra, S.K.
- Shamsi, S., meer
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| Abstract |
In this study a new species of nematode, Iheringascaris goai n. sp., is reported from two fish hosts, including silver whiting, Sillago sihama, and spotted catfish, Arius maculatus, caught off the Central West Coast of India at Goa. The new species can be differentiated morphologically from I. inquies, the most closely related species collected from cohabiting marine fish. The distinguishing characteristics are distinct cuticular striations, a unilateral excretory system, the presence of dentigerous ridges on the inner margin of the lips and the ratio of oesophagus to body length. In males, the ratio of spicules to body length is higher and the number of pre-anal papillae is less in comparison to those in I. inquies. In addition, the tail curves ventrad in males, while in females, the vulva is post-equatorial. The sequence alignment of 18S rDNA and cytochrome c oxidase subunit I with sequences of known species selected from the same superfamily shows a significant difference. The morphological and molecular differences reported here can, therefore, be used to assign the specimen to a new species. |
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