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-monas
The suffix -monas is used in microbiology for many genera and is intended to mean "unicellular organism".
==Meaning==
The suffix -monas is used in microbiology for many genera in a similar way to -bacter, -bacillus, -coccus or -spirillum. The genera with the suffix monas 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 the ''Pseudomonas'', a genus of gammaproteobacteria. The generic epithet ''Pseudomonas'' was coined by Walter Migula in 1894, who did not give an etymology.〔Migula, W. (1894) Über ein neues System der Bakterien. Arb Bakteriol Inst Karlsruhe 1: 235–328. 〕〔Migula, W. (1900) System der Bakterien, Vol. 2. Jena, Germany: Gustav Fischer.〕
Since the 7th edition of Bergey's manual (=top authority in bacterial nomeclature), other authors have given the etymology to be: Greek pseudes (ψευδες) (false) and monas (μονάς / μονάδα a single unit), which can mean "false unit". 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,while the most plausible theory states that Migula intended it as false ''Monas'',〔 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.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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