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 |
| subdivisio | Protostomia Grobben, 1908 - protostomes |
| phylum | Mollusca Cuvier, 1795 - mollusks |
| subphylum | Conchifera Gegenbaur, 1878 - shell-bearers |
| superclassis | Cyrtosoma |
| class | Gastropoda Cuvier, 1795 - gastropods |
| order | Vetigastropoda Salvini-Plawen, 1980 - limpets |
| superfamily | Turbinoidea |
| family | Turbinidae Rafinesque, 1815 |
| subfamily | Colloniinae Cossmann, 1916 |
| genus | Homalopoma Carpenter, 1864 |
| species | Homalopoma nocturnum A. A. Gould, 1861 |
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