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Morphological Redescription and Molecular Characterization of Dactylogyrus labei (Monogenea, Dactylogyridae) from Catla catla: a New Host Record in India. Chiary, H. R., Chaudhary, A., Singh, H. S. - Dactylogyrus labei Musselius et Gusev, 1976 (atypical form) specimens were collected from host Catla catla from the river Brahmaputra, Guwahati, Assam, India. The Dactylogyrus samples were examined by morphological and molecular methods. This parasite was originally described from Labeo rohita from fish farm Kalyani, West Bengal, India, but the morphological study of sclerotized parts showed the existence of D. labei on Catla catla. This is the first record of D. labei from Catla catla in India.


The present study describes the molecular characterization of the monogenea Dactylogyroides tripathii (Tripathi, 1959) Gussev, 1973 infecting the gill filaments of fish, Puntius ticto from River Brahmaputra, Guwahati, Assam, India. This study shows the D. tripathii species identification resulted from the use of molecular data, particularly the 28S rDNA gene. We compared the 28S partial rDNA sequence of D. tripathii with same gene region of the other species of monogeneans available in GenBank. With this comparison, we determined that the sequence had a similarity with one available species of the genus Dactylogyroides Gussev, 1963 i. e., D. longicirrus and also with the species of Dactylogyrus from which this genus was distinguished.