| Name | Author | Source | Citation | Year |
|---|
| AGAROPHYTON | C.F.D. Gurgel, J.N. Norris & S. Fredericq | Phytotaxa | 374: 8 | 2018 |
| Agarophyton chilense ('chilensis') | (C.J. Bird, J.L. McLachlan & E.C. Oliveira) C.F.D. Gurgel, J.N. Norris & S. Fredericq | Phytotaxa | 374: 8 | 2018 |
| Agarophyton tenuistipitatum | (C.F. Chang & B.M. Xia) C.F.D. Gurgel, J.N. Norris & S. Fredericq | Phytotaxa | 374: 8 | 2018 |
| Agarophyton vermiculophyllum | (H. Ohmi) C.F.D. Gurgel, J.N. Norris & S. Fredericq | Phytotaxa | 374: 9 | 2018 |
| Amphidoma alata | U. Tillmann | Phycol. Res. | 66: 272, figs. 4-6 | 2018 |
| Amphidoma cyclops | U. Tillmann | Phycol. Res. | 66: 277, figs. 7-9 | 2018 |
| Amphidoma trioculata | U. Tillmann | Phycol. Res. | 66: 270, figs. 1-3 | 2018 |
| Aneumastus yamdrokensis | Q. Liu & S.L. Xie in Liu et al. | Phytotaxa | 373: 232, figs. 2-17 | 2018 |
| Ansanella natalensis | (T. Horiguchi & R.N. Pienaar) M. Dawut, S. Sym & T. Horiguchi | Phycol. Res. | 66: 308 | 2018 |
| Azadinium asperum | U. Tillmann | Phycol. Res. | 66: 280, figs. 10-12 | 2018 |
| CORALLOPSIS | C.F.D. Gurgel, J.N. Norris & S. Fredericq | Phytotaxa | 374: 7 | 2018 |
| CRASSA | C.F.D. Gurgel, J.N. Norris & S. Fredericq | Phytotaxa | 374: 10 | 2018 |
| Crassa birdiae | (E. Plastino & E.C. Oliveira) C.F.D. Gurgel, J.N. Norris & S. Fredericq | Phytotaxa | 374: 11 | 2018 |
| Crassa caudata | (J. Agardh) C.F.D. Gurgel, J.N. Norris & S. Fredericq | Phytotaxa | 374: 10 | 2018 |
| Crassa changii | (B.M. Xia & I.A. Abbott) C.F.D. Gurgel, J.N. Norris & S. Fredericq | Phytotaxa | 374: 10 | 2018 |
| Crassa cornea | (J. Agardh) C.F.D. Gurgel, J.N. Norris & S. Fredericq | Phytotaxa | 374: 10 | 2018 |
| Crassa crassissima | (P. Crouan & H. Crouan) C.F.D. Gurgel, J.N. Norris & S. Fredericq | Phytotaxa | 374: 10 | 2018 |
| Crassa crouaniorum | (G.M. Lyra, J.C.M. Nunes & C.C. Davis) C.F.D. Gurgel, J.N. Norris & S. Fredericq | Phytotaxa | 374: 11 | 2018 |
| Crassa firma | (C.F. Chang & B.M. Xia) C.F.D. Gurgel, J.N. Norris & S. Fredericq | Phytotaxa | 374: 11 | 2018 |
| Crassa punctata | (Okamura) C.F.D. Gurgel, J.N. Norris & S. Fredericq | Phytotaxa | 374: 11 | 2018 |
| Crassa secundata | (Harvey) C.F.D. Gurgel, J.N. Norris & S. Fredericq | Phytotaxa | 374: 11 | 2018 |
| Crassa truncata | (G.T. Kraft) C.F.D. Gurgel, J.N. Norris & S. Fredericq | Phytotaxa | 374: 11 | 2018 |
| Crassa usneoides | (C. Agardh) C.F.D. Gurgel, J.N. Norris & S. Fredericq | Phytotaxa | 374: 11 | 2018 |
| Dinobryon ningwuense ('ningwuensis') | X. Jiang, J. Feng & S. Xie in Jiang et al. | Phytotaxa | 374: 223, fig. 2 | 2018 |
| Euastrum kossinskiae | O.V. Anissimova & D.A. Philippov | Phytotaxa | 376: 77, figs. 1-10 | 2018 |
| GRACILARIOPSIDEAE ('GRACILARIOPSISEAE') | C.F.D. Gurgel, J.N. Norris & S. Fredericq | tribe of Gracilariaceae | Phytotaxa | 374: 12 |
| GYMNOMONAS | Shin Watanabe & T. Nakada in Watanabe & Nakada | Phycological Research | 66: 170 | 2018 |
| Gomphonema bicepiforme ('bicepiformis') | Wei Zhang & J.P. Kociolek in Zhang et al. | Phytotaxa | 375: 275, figs. 1-30 | 2018 |
| Gomphonema wuyiense ('wuyiensis') | W. Zhang & J.P. Kociolek in Zhang et al. | Phytotaxa | 375: 114, figs. 1-19 | 2018 |
| Gracilaria crouaniorum | G.M. Lyra, J.M.C. Nunes, & C.C. Davis in Lyra et al. | J. Phycol. | 51: 364 | 2015 |
| Gracilaria firma | C.F. Chang & B.M. Xia | Stud. Mar. Sin. | 11: 143, 162, pl. II: fig. 4, text-figs. 38, 39 | 1976 |
| Gracilaria gardneri | (Setchell) C.F.D. Gurgel, J.N. Norris & S. Fredericq | Phytotaxa | 374: 7 | 2018 |
| Gracilaria secundata | Harvey | Phycol. austral. (Syn. cat. Austral. Tasman. alg.) | 5: xxxv | 1863 |
| Gracilaria tenuistipitata | C.F. Chang & B.M. Xia | Stud. Mar. Sin. | 11: 102, 161, pl. I: fig. 3; text-fig. 7 | 1976 |
| Gracilaria xiae-abbottiae ('xiae-abbottii') | G.M. Lyra, J.M.C. Nunes & C.C. Davis in Lyra et al. | J. Phycol. | 51: 365 | 2015 |
| Gracilariopsis oryzoides | (Setchell & H.L. Wilson) C.F.D. Gurgel, J.N. Norris & S. Fredericq | Phytotaxa | 374: 12 | 2018 |
| Gymnomonas nepalensis | Shin Watanabe in Watanabe & Nakada | Phycological Research | 66: 170, figs. 3-12 | 2018 |
| Hydropuntia millardetii | (Montagne) C.F.D. Gurgel, J.N. Norris & S. Fredericq | Phytotaxa | 374: 10 | 2018 |
| Karlodinium jejuense | Zh. Li & H.H. Shin | Phycol. Res. | 66: 320, figs. 2-4 | 2018 |
| MELANTHALIOIDEAE | C.F.D. Gurgel, J.N. Norris & S. Fredericq | Phytotaxa | 374: 12 | 2018 |
| Microglena redcarensis | T. Nakada & S. Takahashi | Phycol. Res. | 66: 311, figs. 1, 2 | 2018 |
| Minidiscus vodyanitskiyi | A.M. Lyakh & Y.D. Bedoshvili | Phytotaxa | 375: 174, figs. 2-13, 15-17, 19 | 2018 |
| POLYCAVERNOSA | (C.F. Chang & B.M. Xia) C.F.D. Gurgel, J.N. Norris & S. Fredericq | Phytotaxa | 374: 9 | 2018 |
| Polysiphonia rhododactyla | Harvey in Hooker | Fl. Nov.-Zel. | 2: 228 | 1855 |
| Pseudanabaena cinerea | A. Tuji & Y. Niiyama | Phycol. Res. | 66: 293, fig. 1a | 2018 |
| Pseudanabaena yagii | A. Tuji & Y. Niiyama | Phycol. Res. | 66: 294, fig. 1b | 2018 |
| Rhodymenia punctata | Okamura | Icon. Jap. Alg. | 6: pl. CCLVIII | 1929 |
| Streblocladia rhododactyla | (Harvey) R. D'Archino, B. Kim & M.S. Kim in M.S. Kim et al. | Phytotaxa | 374: 44 | 2018 |
| Tabularia sinensis | Y. Cao et al. | Phytotaxa | 373: 180, figs. 1-39 | 2018 |