Figure 1: Light microscopy pictures of an undescribed dinokaryotic parasite of a rotifer, tentatively Synchaeta. (a)–(d) Infected host. (e)–(j) Recently released dinospores. lf: longitudinal flagellum. See video in Supplementary Material, http://youtu.be/WosjATyy1DE. Scale bars: (a)–(d) 50 μm; (e)–(j) 10 μm.