NEW SPECIES OF DEMIDOSPERMUS (MONOGENEA: DACTYLOGYRIDAE) OF PIMELODID CATFISH (SILURIFORMES) FROM PERUVIAN AMAZONIA AND THE REASSIGNMENT OF UROCLEIDOIDES LEBEDEVI KRITSKY AND THATCHER, 1976. Journal of Parasitology, 97(4), Aug 2011: 586-592. 588 [Zoological Record Volume 147]