| Valid name | Eustomias |
| Synonym | Type: E. obscurus Vaillant, by monotypy. |
| Synonym | Gender: M; Exped. Sci. 'Travailleur' 'Talisman', Poiss.: 112 |
| Synonym | Eustomias Vaillant, 1888 |
| Synonym | Spilostomias (subgen.) Eustomias braueri Zugmayer, 1911). |
| Synonym | Dinematochirus (subgenus) Pappenheim, 1914)). |
| Synonym | Haploclonus (subgen.) Welsh, 1923). |
| Synonym | Triclonostomias (subgen.) Regan and Trewavas, 1930). |
| Synonym | Achirostomias (subgen.) Regan and Trewavas, 1930). |
| Synonym | Urostomias (subgen.) Regan and Trewavas, 1930). |
| Synonym | Rhynchostomias (subgen.) Regan and Trewavas, 1930). |
| Synonym | Parastomias Roule and Angel, 1933). |
| Synonym | Pareustomias Bailly, 1930, Bull. Mus. Hist. nat. Paris, 2: 378 (type: P. chabanaudi Bailly, by monotypy). |
| Synonym | Neostomias Gilchrist, 1908, Mar. Invest. 5. Afr., 4: 168 (type: N. filiferum Gilchrist, by monotypy). |
| Synonym | Nominostomias (subgen.) Regan and Trewavas, 1930, Danish Dana Exped. 1920-1922, (6): 72 (orthotype: Eustomias bibulbos |