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 to still be alive, along with Mantis, Gamora, Cosmo and Major Victory, but trapped in suspended animation and prisoners of the Magus. She then breaks free and frees the other Guardians, but after a fierce fight she is misled by Maelstrom into freeing Thanos, who was concealed inside a cocoon. When the two teams of Guardians reunite, Phyla-Vell is reported as the first victim of Thanos' rampage, her remains seen by Mantis but never shown on panel. She is later mourned by the Guardians on Knowhere. Phyla is later shown in Hell when Thanos and Deadpool venture there in search