| Name | Polycystis (Kützing) Kützing |
| Authorship | (Kützing) Kützing |
| Rank | Genus |
| NomenclaturalStatus | LaterHomonym |
| Placed in | Chroococcaceae |
| Contains | Polycystis elabens (Brébisson ex Meneghini) Kützing Polycystis litoralis Hansgirg Polycystis packardii Farlow ex Forti Polycystis sp. Kützing |
| Remarks | non Léveillé (1846). Lectotype Species: P. aeruginosa (Kützing) Kützing (Micraloa aeruginosa Kützing) (vide F. Drouet et W. A. Daily, Butler Univ. Bot. Stud. 12: 34. Jun 1956) |
| Citation | 1849 Sp. Alg. [Kützing] 210 |