Pristolepis marginata Jerdon 1849

Distribution of Pristolepis marginata Jerdon (1849) listed the east-flowing Mananthavady, the west-flowing Kuttyadi and the west-flowing Kannoth Rivers as the type localities of Pristolepis marginata. Repeated sampling in Kuttyadi and Kannoth, however, resulted in the collection of Pristolepis specimens that possess only three anal-fin spines. These specimens were also genetically distinct from P. marginata specimens from Mananthavady. The specimens from Kuttyadi and Kannoth, morphologically correspond to P. malabarica Günther, 1864. We therefore conclude that P. marginata is restricted to tributaries of the east-flowing Cauvery River including the Kabini, Harangi and Hemavathy Rivers (Fig. 1).