Pseudomonadota is a major phylum of Gram-negative bacteria. The renaming of phyla in 2021 remains controversial among microbiologists, many of whom continue to use the earlier names of long standing in the literature. The phylum Proteobacteria includes a wide variety of pathogenic genera, such as Escherichia, Salmonella, Vibrio, Yersinia, Legionella, and many others. Others are free-living (nonparasitic) and include many of the bacteria responsible for nitrogen fixation.
The Thermomicrobia is a group of thermophilic green non-sulfur bacteria. Based on species Thermomicrobium roseum and Sphaerobacter thermophilus, this bacteria class has the following description:
Geobacillus stearothermophilus is a rod-shaped, Gram-positive bacterium and a member of the phylum Bacillota. The bacterium is a thermophile and is widely distributed in soil, hot springs, ocean sediment, and is a cause of spoilage in food products. It will grow within a temperature range of 30 to 75 °C. Some strains are capable of oxidizing carbon monoxide aerobically. It is commonly used as a challenge organism for sterilization validation studies and periodic check of sterilization cycles. The biological indicator contains spores of the organism on filter paper inside a vial. After sterilizing, the cap is closed, an ampule of growth medium inside of the vial is crushed and the whole vial is incubated. A color and/or turbidity change indicates the results of the sterilization process; no change indicates that the sterilization conditions were achieved, otherwise the growth of the spores indicates that the sterilization process has not been met. Recently a fluorescent-tagged strain, Rapid Readout(tm), is being used for verifying sterilization, since the visible blue fluorescence appears in about one-tenth the time needed for pH-indicator color change, and an inexpensive light sensor can detect the growing colonies.
The Chloroflexota are a phylum of bacteria containing isolates with a diversity of phenotypes, including members that are aerobic thermophiles, which use oxygen and grow well in high temperatures; anoxygenic phototrophs, which use light for photosynthesis ; and anaerobic halorespirers, which uses halogenated organics as electron acceptors.
Porphyromonas is a Gram-negative, non-spore-forming, obligately anaerobic and non-motile genus from the family of Porphyromonadaceae. This genus has been found to be part of the salivary microbiome. The use of targeted 16S rRNA gene metagenomic sequencing has shown that the genus is well represented in healthy individuals from the Human Microbiome Project.
Opecoelidae is a family of trematodes. It is the largest digenean family with over 90 genera and nearly 900 species, almost solely found in marine and freshwater teleost fishes. It was considered by Bray et al. to belong in the superfamily Opecoeloidea Ozaki, 1925 or the Brachycladioidea Odhner, 1905.
Gynandrocarpa is a genus of ascidian tunicates in the family Styelidae.
Polyandrocarpa is a genus of ascidian tunicates in the family Styelidae.
Icriodus is an extinct conodont genus in the family Gnathodontidae.
Arenibacter is a rod-shaped and strictly aerobic genus from the family of Flavobacteriaceae.
Arenibacter certesii is a heterotrophic and aerobic bacterium from the genus of Arenibacter which has been isolated from the green alga Ulva fenestrata from the Sea of Japan.
Arenibacter echinorum is a heterotrophic and aerobic bacterium from the genus Arenibacter which has been isolated from the sea urchin Strongylocentrotus intermedius from the Sea of Japan.
Arenibacter hampyeongensis is a Gram-negative, strictly aerobic bacterium from the genus Arenibacter which has been isolated from tidal flat from Hampyeong in Korea.
Arenibacter nanhaiticus is a Gram-negative, rod-shaped and aerobic bacterium from the genus Arenibacter which has been isolated from sandy sediments from the South China Sea.
Arenibacter palladensis is a heterotrophic and aerobic bacterium from the genus Arenibacter which has been isolated from the green alga Ulva fenestrata in the Sea of Japan.
Arenibacter troitsensis is a heterotrophic, aerobic and non-motile bacterium from the genus Arenibacter which has been isolated from marine bottom sediments from the Gulf of Peter the Great in the Sea of Japan.
Arenibacter algicola is a Gram-negative, hydrocarbon-degrading and strictly aerobic bacterium from the genus Arenibacter. Arenibacter algicola uses polycyclic aromatic hydrocarbons as only sources fore carbon and energy.
Arenibacter antarcticus is a Gram-negative, strictly aerobic and rod-shaped bacterium from the genus of Arenibacter which has been isolated from sediments the Ross Sea.
Arenibacter catalasegens is a Gram-negative, aerobic, rod-shaped and non-motile bacterium from the genus of Arenibacter which has been isolated from surface sediments from the Southern Indian Ocean.
