Animal mesoderm forms by enterocoelic pouching, through invagination of the endoderm. The main deuterostome phyla are the Echinodermata and the Chordata. Echinoderms are exclusively marine and include starfish, sea urchins, and sea cucumbers. The chordates are dominated by the vertebrates (animals with backbones), which consist of fishes, amphibians, reptiles, birds, and mammals. The deuterostomes also include the Hemichordata (acorn worms). The Ecdysozoa are protostomes, named after their shared trait of ecdysis, growth by moulting. They include the largest animal phylum, the Arthropoda, which contains insects, spiders, crabs, and their kin. All of these have a body divided into repeating segments, typically
Phyla-Vell Phyla later appeared during "Annihilation" where she had been visiting her father's grave with Moondragon when the pair were attacked by Thanos who ripped off Moondragon's ear and gave it to Phyla, telling her to go to Drax the Destroyer and how his actions would determine Moondragon's fate shortly before teleporting away with Moondragon. Drax has indicated he will not be stopping his pursuit of Thanos. Phyla then goes with Nova and Star-Lord to lead a final battle against Annihilus, being saved at the last second by a massive energy wave caused by the just freed Galactus, which left only