Diatom genera

Navicula is a genus of boat-shaped diatom (single-celled photosynthetic organisms), comprising over 1,200 species, though many Navicula species likely do not belong in the genus strictly speaking. Navicula is Latin for "small ship", and also a term in English for a boat-shaped incense-holder. Navicula is a cosmopolitan genus and species are present in both freshwater and marine environments, typically attached to surfaces (i.e. benthic).

Asterionella is a genus of pennate freshwater diatoms. They are frequently found in star-shaped colonies of individuals.

Pseudo-nitzschia is a marine planktonic diatom genus that accounts for 4.4% of pennate diatoms found worldwide. Some species are capable of producing the neurotoxin domoic acid (DA), which is responsible for the neurological disorder in humans known as amnesic shellfish poisoning (ASP). Currently, 58 species are known, 28 of which have been shown to produce DA. It was originally hypothesized that only dinoflagellates could produce harmful algal toxins, but a deadly bloom of Pseudo-nitzschia occurred in 1987 in the bays of Prince Edward Island, Canada, and led to an outbreak of ASP. Over 100 pe

thumb|upright=1.2| Phytoplankton – such as this colony of Chaetoceros socialis – naturally give off fluorescent light as they dissipate excess solar energy that they cannot consume through photosynthesis. thumb|upright=1.2|Bright-field microscopy image of epiphytic cyanobacterial symbiont [[Calothrix rhizosoleniae SC01 9 (indicated by arrows) attached to a host diatom Chaetoceros sp. (c). Scale bar, 50 μm.]]

Gomphonema is a genus of diatoms belonging to the family Gomphonemataceae.

Fragilaria is a genus of freshwater and saltwater diatoms. It is usually a colonial diatom, forming filaments of cells mechanically joined by protrusions on the face and in the center of their valves. The individual diatoms appear swollen in their centers where they are joined to the colonial ribbon. The genus grows as both plankton and benthic species, free living in colonies or as epiphytes. Some species are bloom forming diatoms in eutrophic lakes. The type species is Fragilaria pectinalis Lyngbye from designating a lectotype from Conferva pectinalis O.F.Müller. The taxonomy of the genus is

Nitzschia is a common pennate marine and freshwater diatom. In the scientific literature, this genus, named after Christian Ludwig Nitzsch, is sometimes referred to incorrectly as Nitzchia, and it has many species described, which all have a similar morphology. In its current circumscription, Nitzschia is paraphyletic.

Cyclotella is a genus of diatoms often found in oligotrophic environments, both marine and fresh water. It is in the family Stephanodiscaceae and the order Thalassiosirales. The genus was first discovered in the mid-1800s and since then has become an umbrella genus for over 100 different species, the most well-studied and the best known being Cyclotella meneghiniana. Despite being among the most dominant genera in low-productivity environments, it is relatively understudied.

Bacillaria is a diatom genus in the family Bacillariaceae.

Cymbella is a diatom genus in the family Cymbellaceae including over 800 species. The type species for this genus is Cymbella cymbiformis Agardh 1830. Cymbella species are found in freshwater environments.

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genus of algae

Pinnularia is a genus of fresh water algae, more specifically a type of diatom.

Surirella is a genus of diatoms in the family Surirellaceae.

Melosira is a genus of diatoms belonging to the family Melosiraceae.

Coscinodiscus is a genus of centric diatoms in the family Coscinodiscaceae. It is the type genus of its family. There are over 200 species of Coscinodiscus. Coscinodiscus argus Ehrenberg 1839 is the type species of this genus.

Eunotia is a genus of diatoms. They are fresh water diatoms, specifically common in lakes, and they are also common in fossil records, although their siliceous wall design may have been lost and they appear plane, an example is Eunotia tetradon.

Diatoma is a genus of diatoms belonging to the family Fragilariaceae.

Diploneis is a genus of diatoms belonging to the family Diploneidaceae.

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Gyrosigma is a genus of diatoms belonging to the family Pleurosigmataceae.

Aulacoseira is a genus of diatoms belonging to the family Aulacoseiraceae.

Thalassiosira is a genus of centric diatoms, comprising over 100 marine and freshwater species. It is a diverse group of photosynthetic eukaryotes that make up a vital part of marine and freshwater ecosystems, in which they are key primary producers and essential for carbon cycling.

Epithemia is a genus of diatoms belonging to the family Rhopalodiaceae. The genus has cosmopolitan distribution and are found in freshwater and marine ecosystems. Recent studies have proposed that the genus Rhopalodia should be recategorized to join Epithemia based on phylogenetic evidence, although this change in nomenclature has been disputed or ignored.

Stephanodiscus is a genus of centric diatoms, belong to the family Stephanodiscaceae. These diatoms are single-celled, photosynthetic algae characterized by circular, radially symmetrical silica cell walls (frustules).

Attheya is a genus of small single celled diatoms. Some of these species were earlier regarded to belong to Chaetoceros, or to Gonioceros, the taxonomic status of some of these species are still debated.

Hyalodiscus is an extant genus of diatom known also from the fossil record.

genus of algae

Meridion is a genus of diatoms belonging to the family Fragilariaceae.

Achnanthidium is a genus of diatoms belonging to the family Achnanthidiaceae.

Oscillaria is a genus of filamentous diatoms.

Stauroneis is a genus of diatoms (Bacillariophyta) with species that occur in fresh and marine water.

Asterionellopsis is a genus of diatoms belonging to the family Asterionellopsidaceae.

Cymatopleura is a genus of diatoms belonging to the family Surirellaceae.

Cerataulina is a diatom genus. Cerataulina is similar to another genus of the family Hemiaulaceae, Eucampia. Cerataulina inhabits coastlines and estuaries. Cerataulina was originally classified as Syringigium in 1980 by Hasle & Syvertsen.

Amphiprora is a genus of diatoms belonging to the family Amphipleuraceae.

Fragilariopsis is a genus of diatoms belonging to the family Bacillariaceae.