Middle proterozoic (1.5 Ga.) Horodyskia moniliformis Yochelson and Fedonlin, the oldest known tissue-grade colonial eucaryote - Fedonkin, Mikhail Aleksandrovich; Yochelson, Ellis Leon, 1928- (Washington : Smithsonian Institution Press, 2002)
Keywords: PALEONTOLOGÍA; HORODYSKIA MONILFORMIS