New species of myxosporidia of the genera Myxidium Butschli, 1882 and Myxobolus Butschli, 1882 (Myxozoa, Myxosporea) in freshwater fishes from Chad (central Africa). Journal of African Zoology, 112(3), 28 August 1998: 249-259. 253 [Zoological Record Volume 135]