Uniramia is one of three subphyla in the Arthropoda classification suggested by Sidnie Manton. It is divided into three subphyla&colon; the Mastigophora, the Sarcodina and the Opalinata. Not all fauna phyla are divided into subphyla. It is divided into the subphyla "Haploviricotina" and "Polyploviricotina". The chordate phylum has three subphyla, one of which is the vertebrates (see below). In 2013, it consisted of three subphyla&colon; Eolouka (Tsukubea and Jakobea), Metamonada and Neolouka ("Malawimonas"). In animals, corals (phyla Cnidaria) and barnacles (Subphyla Crustacea), androdioecy has evolved from hermaphroditism.