Henneguya sp. parasite from the skin of Synbranchus marmoratus. a: formalin-fixed myxospores in valvular view showing appendage caudal (large arrows) and two polar capsules in the anterior pole of spore occupied only the anterior third of the myxospore body (small blue arrows). b: mature myxospores stained with Giemsa with noticeable binucleate sporoplasm (double arrow) and polar capsules with aubergine shape (large arrow). c: schematic illustration of mature myxospore with polar tubule inside of polar capsule. Scale bars: 5 µm.