Position in a system
| system | Vitae - living organisms |
| domain | Bacteria (Haeckel, 1894) Woese, Kandler Wheelis, 1990 - bacterians |
| phylum | Cyanobacteria Stanier ex Cavalier-Smith, 2002 - blue-green algae |
| class | Cyanophyceae Schaffner, 1909 |
| subclass | Nostocophycideae |
| order | Nostocales Cavalier-Smith, 2002 |
| Nostocales incertae sedis | |
| genus | Marpolia C.D. Walcott, 1919 † |
| species | Marpolia spissa Walcott 1919 † |