Redescription of some Indian species of Thaparocleidus Jain, 1952 (Monogenea), with aspects of the developmental biology and mode of attachment of T. pusillus (Gusev, 1976).

Thaparocleidus wallagonius Jain, 1952, the type-species of the genus, is redescribed from the type-host and locality. T. gomtius (Jain, 1952), T. seenghali (Jain, 1961), T. indicus (Kulkarni, 1969), T. malabaricus (Gusev, 1976) and T. pusillus (Gusev, 1976) were also redescribed, as their original descriptions are incomplete. The following new synonymies for some Indian species are proposed: Urocleidus bhagwanpurensis Agrawal & Singh, 1982, as a junior synonym of T. wallagonius; U. gorakhpurensis Agrawal & Singh, 1982, Murraytrema gorakhpurensis Agrawal & Singh, 1985 and Ancylodiscoides kulkarnii Agrawal & Sharma, 1988 as junior synonyms of T. seenghali; and U. tandani Agrawal & Singh, 1982, A. meerutensis Singh, Agarwal, Kumar & Vibha, 1997 and Silurodiscoides elongatus Singh, Agarwal, Kumar & Vibha, 1997 as junior synonyms of T. indicus. Data on the developmental biology and mode of attachment of T. pusillus from Mystus bleekeri at Lucknow are included.