Sphaerostephanos suboppositus Holttum
- ≡Aspidium heterocarpus sensu Christ in Ann. Jard. Bot. Btzg 15: 133. 1898
- ≡Aspidium procurrens sensu Christ in Ann. Jard. Bot. Btzg 15: 130. 1898
- Unknown type category: Celebes, Mina- hassa, G. Lokon, Alston 15744
