Position in a system
| system | Vitae - living organisms |
| domain | Eukaryota Whittaker & Margulis, 1978 - lifeforms with nucletic cells |
| superregnum | Bikonta - bikonts |
| Corticata | |
| kingdom | Chromalveolata Adl et al., 2005 |
| phylum | Heterokontophyta |
| subphylum | Diatomeae (Dumortier, 1821) Cavalier-Smith, 1995 - diatoms |
| class | Bacillariophyceae Haeckel, 1878 |
| subclass | Bacillariophycidae (Haeckel 1878) Mann 1990 |
| order | Naviculales Bessey 1907 |
| suborder | Sellaphorineae Mann 1990 |
| family | Sellaphoraceae Mereschkowsky 1902 |
| genus | Fallacia A.J. Stickle & D.G. Mann in F.E. Round, R.M. Crawford & D.G. Mann 1990 |
| species | Fallacia monoculata (Hust.) D.G.Mann in Round et al. 1990 |