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Abstract

The present study reports five species of Ornithocercus Stein from north Arabian Sea shelf of Pakistan, four of them being new records from the area. The most common and frequent species was O. magnificus and the largest species O. steinii. Individuals of a given species showed variation in size of their body and also of different parts with greater variations observed in length of sulcal list. The Indus Delta region was found to be richer in species diversity than Balochistan.

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