Name: Entomoplasma somnilux (Williamson et al. 1990) Tully et al. 1993

Category: Species

Proposed as: comb. nov.

Basonym: Mycoplasma somnilux Williamson et al. 1990

Etymology: som’ni.lux. L. masc. n. somnus, sleep; L. fem. n. lux, light; N.L. fem. n. somnilux, intended to mean sleeping light, referring to the quiescent pupal stage of the host from which the organism was isolated, which precedes the luminescent adult stage (nominative in apposition)

Pronunciation (Latin), gender: en-to-mo-PLAS-ma SOM-ni-lux, neuter

Type strain: ATCC 49194; NCTC 11719; PYAN-1

Conduct genome-based taxonomy at

16S rRNA gene: AY157871 Analyse FASTA

Valid publication: Tully JG, Bové JM, Laigret F, Whitcomb RF. Revised taxonomy of the class Mollicutes: proposed elevation of a monophyletic cluster of arthropod-associated mollicutes to ordinal rank (Entomoplasmatales ord. nov.), with provision for familial rank to separate species with nonhelical morphology (Entomoplasmataceae fam. nov.) from helical species (Spiroplasmataceae), and emended descriptions of the order Mycoplasmatales, family Mycoplasmataceae. Int. J. Syst. Bacteriol. 1993; 43:378-385. 🇺🇸

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym (and not recommended for medical use)

Correct name: Williamsoniiplasma somnilux (Williamson et al. 1990) Gupta et al. 2019

Risk group: 1

• Synonyms:

  • Name	Kind
    Williamsoniiplasma somnilux (Williamson et al. 1990) Gupta et al. 2019	homotypic synonym, validly published under the ICNP
    Mycoplasma somnilux Williamson et al. 1990	homotypic synonym, validly published under the ICNP

• Notes:
  • ❗ Entomoplasma somnilux is the correct name instead if this species is regarded as a separate species (i.e., if its nomenclatural type is not assigned to another species whose name is validly published, legitimate and not rejected and has priority) within a separate genus Entomoplasma.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No". — The risk group for Germany has been imported on 2026-08-13. The full classification is: risk group = 1. — If in doubt, use the risk group given in the regulations for your country and, if these are not available, use the risk group given in the catalogue of the culture collection from which you have obtained or intend to obtain the strain.
  • 🎓 Name mentioned 2 times in PubMed until 2026-06-11.
  • 🙅 This name is on the List of Recommended Names for bacteria of medical importance (LoRN) as a synonym of the name to be applied to this species. The name is on LoRN because of the recorded risk group of the genus.
  • 🧍 This name was not found in the expected IJSEM notification list.

Parent taxon: Entomoplasma Tully et al. 1993

Assigned by: Tully JG, Bové JM, Laigret F, Whitcomb RF. Revised taxonomy of the class Mollicutes: proposed elevation of a monophyletic cluster of arthropod-associated mollicutes to ordinal rank (Entomoplasmatales ord. nov.), with provision for familial rank to separate species with nonhelical morphology (Entomoplasmataceae fam. nov.) from helical species (Spiroplasmataceae), and emended descriptions of the order Mycoplasmatales, family Mycoplasmataceae. Int. J. Syst. Bacteriol. 1993; 43:378-385. 🇺🇸

Linking: To permanently link to this page, use https://doi.org/10.83108/rn.783784Copy to clipboardLink copied to clipboard

Record number: 783784