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| No. | Valid Name | Author | English Name |
| 1. | Guyanancistrus brevispinis | (Heitmans, Nijssen & Isbrücker, 1983) | |
| 2. | Guyanancistrus brownsbergensis | Mol, Fisch-Muller & Covain, 2018 | |
| 3. | Guyanancistrus megastictus | Fisch-Muller, Mol & Covain, 2018 | |
| 4. | Guyanancistrus nassauensis | Mol, Fisch-Muller & Covain, 2018 | |
| 5. | Guyanancistrus tenuis | Fisch-Muller, Mol & Covain, 2018 | |
| 6. | Guyanancistrus teretirostris | Fisch-Muller, Mol & Covain, 2018 |