Phytovorus simmolyna
Some zoospores of P. poliosa got caught on Simalgeara xanthensis as Tetraplecus gigantocetus migrated to zone 9 and began to parasitize their cells, sapping nutrients. This led to adaptations to live on S. xanthensis which led to P. simmolyna. They have adapted to live on S. xanthensis on all of its hosts.
P. simmolyna zoospores are 4 μm and now seek out S. xanthensis using their antennae, rather than A. greenensis. They will grow their mycelium into the cells of S. xanthensis if they find it. When on T. gigantocetus they will grow at a near constant rate from the constant intake of sugars because T. gigantocetus migrates to avoid the polar night. When on T. ichthycetus or T. cheetoensis they will have a rapid growth period when S. xanthensis can photosynthesize and a slow growth period during the polar night. It will release zoospores when S. xanthensis is photosynthesizing. It also stores more sugars, that it obtains from S. xanthensis, lowering the freezing point of water inside itself to survive the colder zones.