Třída: Actinopterygii - paprskoploutví
Řád: Ophidiiformes - hrujovci
Čeleď: Bythitidae - jeskyňovkovití

Reference: Schwarzhans, W. & Møller, P.R. 2007. Review of the Dinematichthyini (Teleostei: Bythitidae) of the Indo-west Pacific. Part III. Beaglichthys, Brosmolus, Monothrix and eight new genera with description of 20 new species. The Beagle: Records of the Museums and Art Galleries of the Northern Territory, 23: 29 - 110.