Dr. Murai Éva - Gubányi András szerk.: Parasitologia Hungarica 27. (Budapest, 1994)

MYXOSPOREA Bütschli, 1881 Bivalvulida Schulman, 1859 Myxobolus Bütschli, 1882 Myxobolus karuni sp. n. Host: Barbus grypus (Heckel,1843) Locality: River Karun in Southwest Iran Site of infection: Primary filaments of the gills Description of the species: Spores (Figs 1A and IB) relatively large, shortly oval in front view, lemon shaped in side view, with prominent suturai folds, straight suturai ridge, indistinct suturai line and long prominent intercapsular appendix. Spore valves symmetrical, smooth, relatively thin but enlarged at the anterior end. Spores 14.1 (13.0-14.9) um long, 10.2 (9.7-10.4) urn wide and 7.2 (6.5-7.8) urn thick. Two polar capsules, elongated ellipsoidal in shape, equal in size, 6.2 (6.5-7.5) urn long, 3.4 (3.2-3.9) /urn wide, tapering only at the discharging channels of the polar filaments (Fig. 1A). Polar capsules slightly longer than the half length of the spore. Polar filaments closely coiled with 10 to 11 turns situated perpendicular to the longitudinal axis of the capsule. A large but indistinct iodophilous vacuole was found in the sporoplasm, which, however, was consistently seen by Nomarski interference microscopy. No projections or membranaceous envelope were found. Tissue sites: Development histozoic (Fig.2A). Developing plasmodia were found inside the blood vessels of the primary filaments, so that a part of the cyst bulged into the lumen of the vessels (Fig. 2A) while the larger part of the plasmodia was embedded in the neighbouring filamental tissue of the gill filament. This latter part of the plasmodium was demarcated from the neighbouring tissues by a thin connective tissue layer. Myxobolus persicus sp. n. Type host: Barbus grypus (Heckel, 1843) Other hosts: Barbus sharpeyi (Günther, 1874); Barbus luteus (Heckel, 1843) Locality: River Karun in Southwest Iran Site of infection: Secondary lamellae of the gills Description of the species: Spores (Figs 1C and ID) oval in front view, tapering anteriorly, lemon shaped in side view, with suturai folds, straight suturai ridge, indistinct suturai line and small intercapsular appendix. Spore valves symmetrical, smooth, relatively thin. Spores 10.0 (9.1-10.4) /;m long, 7.3 (6.5-7.8) ^m wide and 6.3 (5.2-6.5) urn thick. Two polar capsules, pyriform in shape, unequal (or occasionally equal) in length. The larger 5.1 (4.5-5.8) pm long, 2.7 (2.6-3.2) urn wide. The smaller 4.8 (4.5-5.1)/im long (Fig.lD). The larger polar capsules slightly longer than the half length of the spore. The anterior ends of the polar filament are close to each other. Polar filaments coiled up with 6 to 7 turns in the smaller and 7 to 8 turns in the larger capsules situating perpendicular to the longitudinal axis of the capsule. The sporo-