Sphaerostephanos austerus (Brause) Holttum, comb. nov.
- ≡Dryopteris austera Brause in Bot. Jahrb. 56: 108. 1920
- ≡Cyclosorus austerus (Brause) Copel. in Philip. J. Sci. 78: 446. 1951
- ≡Thelypteris austera (Brause) Reed in Phytologia 17: 262. 1968
- Unknown type category: Ledermann 11750
