Belongs within: Mediophyceae.Contains: Stephanodiscus, Thalassiosira. United by silicon tubes Published 12 March 2024 Diatoms are among the most instantly recognised of all aquatic micro-organisms. Their architectural silica tests are unique in the microbial biosphere. They are also among the most abundant organisms in many waters and play a pivotal role in the global distribution of… Continue reading Thalassiosiraceae


Belongs within: Sar.Contains: Diatomeae. Scaleyness is next to diatom-ness Published 22 June 2022 The last few decades have seen significant advances in our understanding of microbial diversity. Consistent improvements in available technologies and methods for study, both molecular and ultrastructural, have allowed researchers to look further and deeper than they ever could before. Not only… Continue reading Diatomista


Belongs within: Bacillariophycidae. Naviculi, Navicula Published 22 December 2020 Diatoms are one of the most prominent groups of micro-algae in aquatic environments, perhaps more abundant than any other major group of aquatic organisms except bacteria. As such, they are a key component in many of the environmental processes that we ultimately depend on: food for… Continue reading Navicula


Belongs within: Diatomeae. Getting your diatoms in a row Published 15 August 2018 Diatoms are one of the world’s primary groups of aquatic unicellular algae. Perhaps only the cyanobacteria rival them for ecological significance. They play a crucial role in the production and fixation of nutrients on which other organisms depend. Diatoms live protected in… Continue reading Melosiraceae


Belongs within: Mediophyceae.Contains: Auliscus. The Actinodiscaceae are a group of centric diatoms with radially ribbed valves. EupodiscaceaeEB93 |–RutilarioideaeEB93 | |–SynedetocystisEB93 | |–SyndetoneisEB93 | `–RutilariaCW59 | |–R. epsilon Grev. 1863CW59 | |–R. lanceolataCW59 | |–R. monile [=Pseudorutilaria monile]CW59 | |–R. pulchra A.S. 1893CW59 | `–R. radiataCW59 `–Eupodiscoideae [Actinodiscaceae, Anguliferae, Eupodisceae]EB93 |–Cosmiodiscus elegansW61 |–AuliscusEB93 |–CraspedoporusEB93 |–Grovea pedalisEB93,… Continue reading Eupodiscaceae

Categorised as Diatomista


Belongs within: Bacillariophycidae. The Bacillariales is a group of pennate diatoms possessing a raphe system. Nitzschiaceae [Bacillariaceae, Bacillariales, Biraphidineae]SG05 |–CrucidenticulaEB93 |–NeodenticulaEB93 |–CymatonitizschiaEB93 |–DenticulopsisEB93 |–GomphonitzschiaEB93 |–PseudoeunotiaEB93 |–SimonseniaEB93 |–CylindrothecaEB93 | |–C. gracilisM01 | `–C. signataUPS98 |–Fragilariopsis Hust. in A.S. 1913BM08, CW59 | |–F. antarctica (Castr.) Hust. in A.S. 1913 [=Fragilaria antarctica Castr. 1886]CW59 | `–F. cylindrusBM08 |–BacillariaEB93… Continue reading Nitzschiaceae

Categorised as Diatomista


Belongs within: Thalassiosiraceae. Thalassiosira is a genus of centric diatoms found primarily in marine waters, with some species found in fresh water. Characters (from Spaulding & Edlund 2008): Valve face flat or tangentially undulate; fultoportulae one to several near the center valve; valve margin with spines or occluded processes; mantle narrow. <==Thalassiosira |–T. alleniiCH97 |–T.… Continue reading Thalassiosira

Categorised as Diatomista


Belongs within: Diatomista.Contains: Nitzschiella, Melosiraceae, Rhizosolenia, Mediophyceae, Bacillariophyceae, Biddulphioideae, Heliopeltaceae, Hemidiscaceae, Coscinodiscus. The Diatomeae, diatoms, are a group of mostly photosynthetic protists with a cell wall composed of a pair of siliceous valves. The Eucentricophycidae is a group containing the majority of radial centric diatoms. The Rhizosoleniaceae are a group of centric diatoms in which the cylindrical… Continue reading Diatomeae