One known and an unknown species of the genus Thaparocleidus Jain, 1952, infecting Sperata aor (Hamilton, 1822): comparison with species from China, on molecular basis

Sperata aor commonly called as long- whiskered cat fish or “Bada Tengan” in local fish markets harboured one new and one previously known species of genus Thaparocleidus Jain, 1952, along with two species of Cornudiscoides Kulkarni, 1969, infesting gills. Thaparocleidus aori (Rizvi, 1971) Lim, 1996, was earlier described by Rizvi therefore was briefly recorded in the present study, except the egg. The newly found species Thaparocleidus susanae n.sp was characterized by the structure of its peculiar copulatory organ. Phylogenetic relationship of the two species under study, along with 14, reterived from GenBank was established using the sequences of 28S rDNA region (Dactylogyrus Diesing, 1850 taken as an out group).