Redescription and morphometric analysis of Paramazocraes thrissocles Tripathi, 1959 and P. setipinna Zhang & Ding in Zhang, Yang & Liu, 2001 (Monogenea: Mazocraeidae) infecting clupeoid fishes off Visakhapatnam coast, Bay of Bengal

Systematic Parasitology
Bade SailajaR Madhavi

Abstract

Two species of the mazocraeid monogenean genus Paramazocraes Tripathi, 1959 are redescribed based on specimens collected from the gills of clupeoid fishes off the Visakhapatnam coast, Bay Bengal: Paramazocraes thrissocles Tripathi, 1959 from Thryssa mystax (Bloch & Schneider), T. setirostris (Broussonet), T. malabarica (Bloch) and Paramazocraes setipinna Zhang & Ding in Zhang, Yang & Liu, 2001 from Setipinna taty (Valenciennes). The two species were subjected to morphological and morphometric analyses. The study revealed that P. thrissocles and P. setipinna differ mainly in the number, size and arrangement of the testes. A review of the genus Paramazocraes is provided and the validity of some of the Indian species of the genus is discussed. Sequences of the 28S rRNA gene for the two species are deposited in the GenBank.

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