Monogeneans from Pangasiidae (Siluriformes) in Southeast Asia: IV. Five new species of Thaparocleidus Jain, 1952 (Ancylodiscoididae) from Pangasius krempfi, P. kunyit, P. mekongensis and P. sabahensis. Parasite, 9(4), Decembre 2002: 315-324. 319 [Zoological Record Volume 139]