| Afifella | |
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| Family: | Afifellaceae Hördt et al. 2020 [1] |
| Genus: | Afifella Urdiain et al. 2009 [2] |
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Afifella is a genus in the phylum Pseudomonadota (Bacteria). [4] [5] [6] Afifella are found in marine and estuarine settings, including microbial mats. [5] [3] [6] They are anaerobes, with one cultured representative capable of photosynthesis.
The generic name Afifella derives from S. Afif, British philosopher and painter, in recognition of his expertise and guidance in the subject of the philosophical tendency of structuralism, essential for the development and understanding of taxonomy as a science. [7]
The genus contains three species: [3] [6]
A. marina is an anaerobe that produces hydrogen. [5] A. pfennigii is a motile, rod shaped, gram stain negative cell with a length of 1-2 μm and a width of 0.6 μm. [6] A. aestuarii is a motile, oval or rod-shaped, gram-stain-negative, oxidase-positive, catalase-negative, pink-coloured phototrophic bacteria. [3]
The three species of Afifella were isolated from coastal waters. A. marina was isolated from marine sponges on the Adriatic shore. [5] A. pfennigii was isolated from a benthic microbial mat from a brackish pond located on the Rangiroa atoll in the Tuamotu islands near Australia. [6] A. aestuarii was isolated from an estuary near Pata, Gujarat, India. [3]
A. marina growth on a rhodospirillaceae medium (DSMZ Medium 27), at 25 °C, with 3% NaCl, and is anaerobic in light. [5] A. pfennigii growth on a (DSMZ Medium 27), at 28 °C, supplemented with 1% NaCl and 0.15% NaHCO3, and is anaerobic in light. [6] A. aestuarii requires thiamine to grow and is the only Afifella isolate capable of photolithoautotrophic, photoorganoheterotrophic and chemoorganoheterotrophic growth modes. [3]
A. marina is designated as strain DSM 2698T and has a GC content of 63.8 mol%. [5] [3] A. pfennigii is designated as strain DSM17143T and has a GC content of 63.8 mol%. [6] [3] A. aestuarii is designated as strain JA968T and has a GC content of 63.5 mol%. A comparison of the 16rRNA gene sequences showed that A. aestuarii strain JA968T was very similar to A. marina strain DSM 2698T at 99.9% similarity and A. pfennigii strain DSM17143T at 98.4% similarity. [3]
Acidisoma is a genus in the phylum Pseudomonadota (Bacteria). It contains two species, Acidisoma tundrae and Acidisoma sibiricum, both two acidophilic and psychrotolerant (2–30 °C) bacteria with poly-β-hydroxybutyrate granules, isolated from acidic Sphagnum-dominated tundra and Siberian wetlands in Russia.
Acidomonas is a genus in the phylum Pseudomonadota (Bacteria). The genus contains single species, namely A. methanolica, formerly known as Acetobacter methanolicus
Actinocatenispora is a genus in the phylum Actinomycetota (Bacteria).
Actinotalea is a genus in the phylum Actinomycetota (bacteria).
Aegyptianella is a genus in the phylum Pseudomonadota (Bacteria).
Aeribacillus is a genus in the phylum Bacillota (Bacteria).
Daeguia is a genus in the phylum Pseudomonadota (Bacteria).
Dasania is a genus in the phylum Pseudomonadota (Bacteria).
Deefgea is a genus of bacteria in the phylum Pseudomonadota. Deefgea are described as Gram-negative, rod-shaped, facultative anaerobes which generally occur singly. Deefgea are motile, either by a single flagellum or two polar flagella. They are both catalase and oxidase positive.
Lyticum is a genus in the phylum Pseudomonadota (Bacteria).
Agarivorans is a genus in the phylum Pseudomonadota (Bacteria).
Albibacter is a genus in the phylum Pseudomonadota (Bacteria).
Albimonas is a genus in the phylum Pseudomonadota (Bacteria).
Algibacter is a genus in the phylum Bacteroidota (Bacteria).
Cycloclasticus is a genus in the phylum Pseudomonadota (Bacteria).
Cryptanaerobacter is a genus in the phylum Bacillota (Bacteria).
Crocinitomix is a genus in the phylum Bacteroidota (Bacteria).
Croceitalea is a genus in the phylum Bacteroidota (Bacteria).
Mahella is a genus in the phylum Bacillota (Bacteria). The name Mahella derives from: Neo-Latin feminine gender dim. noun Mahella, named in honour of the American microbiologist Professor R.A. Mah, for his important contribution to the taxonomy of anaerobes.
Marichromatium is a genus in the phylum Pseudomonadota (Bacteria). The name Marichromatium derives from: Latin mare, the sea; Neo-Latin Chromatium, a genus name; to give Marichromatium, the Chromatium of the sea, the truly marine Chromatium.