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
Han Chinese subgroups Han Chinese subgroups The sub groups of the Han Chinese people, also known as Sinitic peoples, Chinese dialect groups or just dialect groups, are defined based on linguistic, cultural, genetic, and regional features. The terminology used in Mandarin to describe the groups is: "minxi" ( // "ethnic lineages"), used in Mainland China, or "zuqun" ( //, "ethnic groups"), used in Taiwan. Other than Hui people, which is a classification for Muslims of all backgrounds, no Han subgroup is recognized as one of People's Republic of China's 56 official minority ethnic groups. Mandarin, also known as the Northern dialects, is the