They were also compared to modern-day Cnidarians, Polychaetes, and Turbellaria. Because of the prominent central part, they were also seen as Chordates. Because of their feeding habit, they were classified as similar ot the Placozoa. It was suggested, that they lived in symbiosis with organisms doing photosynthesis, and were possibly comparable to modern-day Lichen; if the mechanism worked the same as in modern-day lichens, they would be fungi.