Fig. 1

Cnidarian phylogeny. A A simplified phylogenetic tree showing the position of cnidarians as the sister group to the Bilateria and the relationship between major groups of cnidarians presented at the meeting [45]. The Cnidaria can be spilt into three groups; Anthozoa (Sea anemones, corals etc.); Medusozoa (hydroids, siphonophores, true jellyfish); Endocnidozoa (parasitic Myxozoa and Polypodium). B–D Examples of organisms presented at the meeting: the sea anemone Metridium senile (Anthozoa) (B), a polygastric colony of the siphonophore Chelophyes appendiculata (Hydrozoa) (C) and an adult medusa of the jellyfish Pelagia noctiluca (Scyphozoa). Image credits: Yareli Alvarez (A), Maciej Mańko (B) and Alexandre Jan (D). The silhouettes in A were obtained from phylopic (https://www.phylopic.org/) and all the images are available under a CC0 1.0 license except the siphonophore which was produced by Noah Schlottman (photo by Casey Dunn) and is available under a CC BY-SA 3.0 license (https://creativecommons.org/licenses/by-sa/3.0/)