| Nominal Species (n = 43) | Present allocation (n = 43) | Ref. |
|---|---|---|
| Thalassiosira aestivalis Gran | Thalassiosira aestivalis | 80701 |
| Thalassiosira allenii Takano | Thalassiosira allenii | 80701 |
| Thalassiosira andamanica A.D. Gedde | Thalassiosira andamanica | 80701 |
| Thalassiosira antarctica Comber | Thalassiosira antarctica | 80701 |
| Thalassiosira australis M. Peragallo | Thalassiosira australis | 80701 |
| Thalassiosira bulbosa E.E. Syvertsen | Thalassiosira bulbosa | 80701 |
| Thalassiosira cardiophora F. E. Round | Thalassiosira cardiophora | 80701 |
| Minidiscus chilensis Rivera | Minidiscus chilensis | 80701 |
| Minidiscus comicus Takano | Minidiscus comicus | 80701 |
| Thalassiosira conferta Hasle | Thalassiosira conferta | 80701 |
| Thalassiosira curviseriata Takano | Thalassiosira curviseriata | 80701 |
| Minidiscus decoratus Chrétiennot-Dinet & Quiroga | Minidiscus decoratus | 80701 |
| Thalassiosira delicatula Ostenfeld | Thalassiosira delicatula | 80701 |
| Thalassiosira diporocyclus Hasle | Thalassiosira diporocyclus | 80701 |
| Thalassiosira endoseriata Hasle & G. Fryxell | Thalassiosira endoseriata | 80701 |
| Thalassiosira exigua G. Fryx & Hasle | Thalassiosira exigua | 80701 |
| Thalassiosira fryxelliae Sunesen & Sar | Thalassiosira fryxelliae | 80701 |
| Thalassiosira gravida Cleve | Thalassiosira gravida | 80701 |
| Thalassiosira guillardii Hasle | Thalassiosira guillardii | 80701 |
| Thalassiosira hendeyi Hasle & G. Fryxell | Thalassiosira hendeyi | 80701 |
| Thalassiosira kushirensis Takano | Thalassiosira kushirensis | 80701 |
| Thalassiosira levanderi Van Goor | Thalassiosira levanderi | 80701 |
| Thalassiosira lineata Jousé | Thalassiosira lineata | 80701 |
| Thalassiosira mala Takano | Thalassiosira mala | 80701 |
| Thalassiosira minima Gaarder | Thalassiosira minima | 80701 |
| Thalassiosira minuscula Krasske | Thalassiosira minuscula | 80701 |
| Thalassiosira nordenskioeldii Cleve | Thalassiosira nordenskioeldii | 80701 |
| Thalassiosira oceanica Hasle | Thalassiosira oceanica | 80701 |
| Thalassiosira ornata Proshkina-Lavrenko | Thalassiosira ornata | 80701 |
| Thalassiosira pacifica Gran & Angst | Thalassiosira pacifica | 80701 |
| Thalassiosira partheneia Schrader | Thalassiosira partheneia | 80701 |
| Thalassiosira perpusilla Kozlova | Thalassiosira perpusilla | 80701 |
| Microsiphona potamos Weber | Microsiphona potamos | 80701 |
| Thalassiosira proschkinae Makarova | Thalassiosira proschkinae | 80701 |
| Thalassiosira pseudonana Hasle & Heimdal | Thalassiosira pseudonana | 80701 |
| Thalassiosira rotula Meunier | Thalassiosira rotula | 80701 |
| Thalassiosira scotia Fryxell & Hoban | Thalassiosira scotia | 80701 |
| Thalassiosira simonsenii Hasle & G.Fryxell | Thalassiosira simonsenii | 80701 |
| Thalassiosira subsalina Proshkina-Lavrenko | Thalassiosira subsalina | 80701 |
| Thalassiosira tealata Takano | Thalassiosira tealata | 80701 |
| Thalassiosira tenera Proshkina-Lavrenko | Thalassiosira tenera | 80701 |
| Thalassiosira trifulta G. Fryxell | Thalassiosira trifulta | 80701 |
| Thalassiosira visurgis Hustedt | Thalassiosira visurgis | 80701 |