Myxidiurn leei n. sp. is described from cultured sea bream Sparus aurata L. in Cyprus and Israel. It is histozoic in the intestinal wall and forms small plasmodia that give rise to 2 spores each. The average size of fixed spores is 14.7 pm in length and 6.9 pm in width; their shape is arcuate, elongated polar capsules (average size 3.2 X 7.4 pm, with 7 turns of the polar filament) open at one side of the spore. The case of t h ~s species, which reveals a combination of taxonomic characters fitting both Myxidium and Zschokkella, stresses once again the non-existence of a sharp morphological boundary between the 2 genera.
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Diamant et al. (1994) studied this question.