Fig. 3 in The marine myxosporean Sigmomyxa sphaerica (Thélohan, 1895) gen. n., comb. n. (syn. Myxidium sphaericum) from garfish (Belone belone (L.)) uses the polychaete Nereis pelagica L. as invertebrate host

Fig. 3 Actinospores of S. sphaerica in naturally infected N. pelagica from northern Øresund, Denmark. Interference contrast, to same scale. a Apical and lateral views of free actino-spores. b Lateral views showing the three nuclei of the shell valve cells (arrows) and the two nuclei of the sporoplasm cells (arrowheads). Scale bar 5 μm