Jovan Hadži theories of animal evolution. He devised a system of classification in which he divided the animal kingdom into six phyla: Protozoa, Parazoa, "Ameria" (animals with no segments), "Oligomeria" (animals with few segments), "Polymeria" (animals with many segments) and Chordata. His choice of characters important for classification was generally discredited by his contemporaries, and the system was never accepted by zoologists. However, due to its simplicity, the system was widely used in science education in former Yugoslavia. His other major theory was that of the origin of metazoa - he developed an existing hypothesis stating that the first multicellular animals resembling
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.