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 #18 (February 2004). She fights her brother Genis-Vell, who was insane at the time, in the process helping to restore his sanity. She then tries to lay claim to the "Captain Marvel" title, though her brother refuses to give it up. Phyla is next seen at the trial of Starfox. The "Captain Marvel" (vol. 4) series heavily hinted that Phyla-Vell is a lesbian, and in #25 (September 2004) the character admits that she is attracted to Moondragon and invites her on a tour of the "spiral nebula near Renault VII". Before Moondragon can accept the two wander through a portal.