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Anatomy of Mystus seenghala Endo-skeleton


Anatomy of Mystus seenghala Endo-skeleton



Research Bulletin of the Panjab University, Science 2: 87-127



ISSN/ISBN: 0555-7631

This is the fifth paper in the series of "Anatomy of M. seenghala (Sykes)", and deals with the osteology of this fish. The skull of M. seenghala is a dorsoventrally compressed, elongated, wedge-shaped structure, with the tip produced into a blunt snout. With the exception of parietals, the skull has all the complimentary bones. The visceral skeleton consists of a set of seven visceral arches. The operculum is formed by a series of three bones, viz. pre-opercular, inter-opercular and opercular. The vertebral column, including the urostyle, is usually composed of 50amphlcoelousvertebrae (21 + 29). The first trunk vertebra consists of a narrow centrum and is not fused with the second one, the next five vertebrae, i.e. second, third, fourth, fifth and sixth, are fused to form the complex vertebra. The centra of the first three of these are completely fused while that of the remaining two are suturally connected. The first three vertebrae are highly modified and support the Weberian ossicles. The last five caudal vertebrae support the caudal fin. The urostyle is produced posteriorly into a long and stout process. The upper caudal lobe consists of 15 fin rays which are supported by four epurals, one radial, one urostylar process and three hypurals. The lower caudal lobe consists of 18 to 19 fin rays and is supported by six hypurals, two of which belong to the urostyle. The dorsal fin consists of seven lepidotrichia or fin rays and the anal fin is comprised of 15 lepidotrichia. The pectoral girdle has a large curved cleithrum bone with its posterodorsal part forked at its distal extremity. The single pectoral spine is a long slightly curved and conical structure. The pelvic fin is supported by six fin rays attached by ligaments directly to the posterolateral process of the basipterygia.

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Accession: 030075211

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Related references

A comparative study on the morphology of the brain of Mystus Mystus gulio Ham and Mystus Mystus seenghala Ham. Proceedings of the lndian Science Congress 623(B): 199, 1975

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The endo skeleton comparative anatomy of the skull and the visceral skeleton. Wake, M H (Ed ) Hyman's Comparative Vertebrate Anatomy, 3rd Edition Xi+788p University Of Chicago Press: Chicago, Ill , Usa; London, England Illus P265-326, 1979