Jakoba (marine, no lorica, flattened mitochondrial cristae); Histiona (lorica without spines, posterior "sail" formed by right ventral cytoplasmic vane); Malawimonas (naked, no MLS, discoidal mitochondrial cristae); Retortamonas (larger, anoxic habitats, no mitochondria, multiple vanes on posterior flagellum); Chilomastix (quadriflagellate, otherwise as for Retortamonas).
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