| Name | Author | Source | Citation | Year |
|---|
| Aulacoseira chockii | P.A. Siver | Diatom Research | 36: 254, figs. 1-40 | 2021 |
| Aulacoseira micropunctata | L. Tudesque, R. Le Cohu & B. Van de Vijver | Diatom Research | 36: 224, figs. 421-449 | 2021 |
| Aulacoseira spiralorimoportula | L. Tudesque, R. Le Cohu & B. Van de Vijver | Diatom Research | 36: 218, figs. 362-415, 446-449 | 2021 |
| Brachysira chiaruccii | M. Cantonati, H. Lange-Bertalot, E. Arnaud, M. Galbiati & É Soróczki-Pintér | Diatom Research | 36: 283, figs. 1-27 | 2021 |
| CATENULOPSIS | A. Kryk, A. Witkowski, J.P. Kociolek & S. Mayama in Kryk et al. | Diatom Research | 36: 267 | 2021 |
| Catenula brotasiae | L. Ribeiro, A. Witkowski, & A. Kryk in Kryk et al. | Diatom Research | 36: 270, figs. 36-48 | 2021 |
| Catenula javanica | A. Witkowski, A. Kryk, Y. Risjani & Yunianta in Kryk et al. | Diatom Research | 36: 270, figs. 49-68 | 2021 |
| Catenulopsis catenulafalsa | A. Kryk & A. Witkowski in Kryk et al. | Diatom Research | 36: 267, figs. 2-35 | 2021 |
| Mallomonas camerunensis | J. Piatek | Plant and Fungal Systematics | 66: 46 | 2021 |
| Mallomonas cronbergiae | J. Piatek | Plant and Fungal Systematics | 66: 46 | 2021 |
| Messastrum gracile | (Reinsch) T. Garcia in Kusber et al. | Notulae algarum | 218: 3 | 2021 |
| PRAECYCLOSTEPHANOS | L. Tudesque, R. Le Cohu & B. Van de Vijver | Diatom Research | 36: 199 | 2021 |
| PROBOSCIALES | L.K. Medlin in Boonprokob et al. | Diatom Research | 36 181 | 2021 |
| Praecyclostephanos boengchhmariensis | L. Tudesque, R. Le Cohu & B. Van de Vijver | Diatom Research | 36: 199, figs. 98-142 | 2021 |
| Proboscia siamensis | A. Boonprokob, N. Lundholm & Ø. Moestrup in Boonprokob et al. | Diatom Research | 36 171, figs. 199-206 | 2021 |
| Rhizosolenia loanicola | A. Boonprokob, N. Lundholm & Ø. Moestrup in Boonprokob et al. | Diatom Research | 36 160, figs. 87-95 | 2021 |
| SELENASTRUM | Reinsch | Algenfl. Franken: | 64 | 1866 |
| Stephanodiscus tonlesapensis | L. Tudesque, R. Le Cohu & B. Van de Vijver | Diatom Research | 36: 201, figs. 143-192 | 2021 |
| Urosolenia anlongreangensis | L. Tudesque, R. Le Cohu & B. Van de Vijver | Diatom Research | 36: 189, figs. 23-53 | 2021 |