However, when studying plasmodia of M. nodulointestinalis Masoumian, Baska & Molna´r, 1996, Masoumian et al. (1996) found that extremely large cysts in the intestinal wall of Mesopotamichthys sharpeyi (Gu¨nther) were formed by the amalgamation of small plasmodia. Obviously, the development of the large plasmodia of M. macrocapsularis and M. bliccae,
containing several thousand spores, also occurs by the fusion of small plasmodia located inside the same artery.