Metazoa Haeckel 1874 - multicellular animals see Kingdom Animalia Linnaeus, 1758 Planulozoa Wallberg, Thollesson, Farris & Jondelius 2004 Bilateria Hatschek, 1888 - bilaterians see Subkingdom Bilateria Hatschek, 1888 Nephrozoa Jondelius, Ruiz-Trillo, Baguñà & Riutort 2002 Deuterostomia Grobben, 1908 - deuterostomes see Infrakingdom Deuterostomia Grobben, 1908 Ambulacraria Metschnikoff 1881 [Halanych 1995]