The suffix -monas is used in microbiology for many genera and is intended to mean "unicellular organism".
The suffix -monas found in many genera in microbiology is similar in usage to -bacter, -bacillus, -coccus or -spirillum. The genera with the suffix are not a monophyletic group and the suffix is chosen over -bacter, often simply out of stylistic preferences to match with Greek words.
The first genus to be given the suffix -monas was Pseudomonas , a genus of gammaproteobacteria. The generic epithet Pseudomonas was coined by Walter Migula in 1894, who did not give an etymology. [1] [2] Since the 7th edition of Bergey's manual (=top authority in bacterial nomenclature), other authors have given the etymology to be: Greek pseudēs (ψευδής, false) and monas (μονάς, single unit or monad), which can mean "false unit". [3] However, "false unit" conceptually does not make much sense, namely, it does not mean "an organism which may falsely appear as a single unit but it is not" as it is not found in multicellular chains nor was it ever described as such. One speculation is that the name was chosen simply out of aesthetics, [4] while the most plausible theory states that Migula intended it as false Monas , [4] a nanoflagellate protist ( Chrysophyceae : Ochromonadales : Ochromonadaceae : Chrysomonadida : Ochromonadidae ). Subsequently, the term "monas" was used in the early history of microbiology to denote single-celled organisms. [4]
In English to make a vernacular name for members of a genus, i.e. trivialising the scientific name, the scientific name is taken and written with sentence case and in roman type (i.e. "standard") as opposed to uppercase italic, the plurals are generally constructed by adding an "s", regardless of Greco-Roman grammar. In the case of genera ending in monas the ending is changed to monad with plural -monads. [5] Example: a member of the genus Pseudomonas is a pseudomonad, while two are pseudomonads. The use of the stem for non-nominative cases is seen more often in botany, where trivialisation is more common, e.g. a bromeliad is a member of the genus Bromelia .
Genus | Phylum | Class | Order | Family |
---|---|---|---|---|
Natronomonas | Euryarchaeota | Halobacteria | Halobacteriales | Halobacteriaceae |
Thermogymnomonas | Euryarchaeota | Thermoplasmata | Thermoplasmatales |
Pseudomonas is a genus of Gram-negative bacteria belonging to the family Pseudomonadaceae in the class Gammaproteobacteria. The 313 members of the genus demonstrate a great deal of metabolic diversity and consequently are able to colonize a wide range of niches. Their ease of culture in vitro and availability of an increasing number of Pseudomonas strain genome sequences has made the genus an excellent focus for scientific research; the best studied species include P. aeruginosa in its role as an opportunistic human pathogen, the plant pathogen P. syringae, the soil bacterium P. putida, and the plant growth-promoting P. fluorescens, P. lini, P. migulae, and P. graminis.
The Aurantimonadaceae are a small family of marine bacteria.
The Pseudomonadaceae are a family of bacteria which includes the genera Azomonas, Azorhizophilus, Azotobacter, Mesophilobacter, Pseudomonas, and Rugamonas. The family Azotobacteraceae was recently reclassified into this family.
Azomonas species are typically motile, oval to spherical, and secrete large quantities of capsular slime. They are distinguished from Azotobacter by their inability to form cysts, but like Azotobacter, they can biologically fix nitrogen under aerobic conditions (diazotrophs).
The Brevundimonas are a genus of bacteria. They are Gram-negative, non-fermenting, aerobic bacilli. The Brevundimonas species are ubiquitous in the environment but are rarely isolated from clinical samples., although numbers are increasing. Two species of Brevundimonas originally classified under the genus Pseudomonas have been re-classified by Seger et al. as Brevundimonas vesicularis and Brevundimonas diminuta.
Alteromonas is a genus of Pseudomonadota found in sea water, either in the open ocean or in the coast. It is Gram-negative. Its cells are curved rods with a single polar flagellum.
Monera (/məˈnɪərə/) is historically a biological kingdom that is made up of prokaryotes. As such, it is composed of single-celled organisms that lack a nucleus. It has been superseded by the three-domain system.
Bacterial taxonomy is subfield of taxonomy devoted to the classification of bacteria specimens into taxonomic ranks.
The suffix -bacter is in microbiology for many genera and is intended to mean "bacteria".
Thermoanaerobacter is a genus in the phylum Bacillota (Bacteria). Members of this genus are thermophilic and anaerobic, several of them were previously described as Clostridium species and members of the now obsolete genera Acetogenium and Thermobacteroides
Acidomonas is a genus in the phylum Pseudomonadota (Bacteria). The genus contains single species, namely A. methanolica, formerly known as Acetobacter methanolicus
Carnimonas is a genus in the phylum Pseudomonadota (Bacteria).
Dechloromonas is a genus in the phylum Pseudomonadota (Bacteria).
Dehalogenimonas is a genus in the phylum Chloroflexota (Bacteria). Members of the genus Dehalogenimonas can be referred to as dehalogenimonads.
Dendrosporobacter is a genus in the phylum Bacillota (Bacteria). Members of the class Negativicutes, stain gram negative, despite being firmicutes
Aidingimonas 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).
Alkalimonas is a genus in the phylum Pseudomonadota (Bacteria).
Cryptanaerobacter is a genus in the phylum Bacillota (Bacteria).