Plasmodial development in Rozella. A. Multinucleate plasmodium of R. rhizoclosmatii [strain JEL 863; Letcher et al. 2017] in host Rhizoclosmatium globosum; plasmodium has a central vacuole. B. Early zoospore cleavage of R. allomycetis [strain CSF 55; Powell et al. 2017] in host Allomyces arbuscula; nuclei and mitochondria are organized and flagella appear in cleavage furrows. Abbreviations: F, flagella; PM, parasite mitochondrion; PN, parasite nucleus; Vac, vacuole. Bars = 1 µm.