| Valid name | Polyacanthonotus |
| Synonym | Type: Notacanthus rissoanus F. and V., by designation. |
| Synonym | Polyacanthonotus Bleeker, 1874 |
| Synonym | Gender: M; Vers. Ken. Akad. Wet. Amsterdam, (2) 8: 368 |
| Synonym | Macdonaldia Goode and Bean, 1895, Gender: F; Oceanic Ichth.: 171 (type: Notacanthus rostratus Collett, by monotypy |
| Synonym | Zanotacanthus Fowler, 1936: 256). |
| Synonym | Paradoxichthys Giglioli, 1882, Nature, 25: 535 (type: N. rissoanus F. and V., by monotypy). |
| Synonym | Teratichthys Giglioli, 1882, Nature, 25: 535 (type: T. garibaldianus, by monotypy). |
| Synonym | Gnathonotacanthus Fowler, 1934, Proc. Acad. nat. Sci. Philad, 85 (1933): 266 (type: P. vaillanti Fowler). |