Position in a system
| system | Vitae - living organisms |
| domain | Eukaryota Whittaker & Margulis, 1978 - lifeforms with nucletic cells |
| superregnum | Unikonta |
| system | Opisthokonta Cavalier-Smith, 1987 |
| kingdom | Animalia Linnaeus, 1758 - animals |
| subregnum | Eumetazoa Butschli, 1910 |
| divisio | Bilateria Hatschek, 1888 - bilaterians |
| subdivisio | Protostomia Grobben, 1908 - protostomes |
| phylum | Brachiopoda Duméril, 1806 - lamp shells |
| subphylum | Craniiformea |
| class | Craniata Williams et al., 1996 |
| order | Craniida Waagen, 1885 |
| superfamily | Cranioidea Menke, 1828 |
| family | Craniidae Menke, 1828 |
| genus | Petrocrania Raymond, 1911 † |
| species | Petrocrania meduanensis (Oehlert, 1888) † |