Name: Megamonas Shah and Collins 1983

Category: Genus

Proposed as: gen. nov.

Etymology: Me.ga’mo.nas. Gr. masc. adj. megas, large; L. fem. n. monas, a unit, monad; N.L. fem. n. Megamonas, large monad

Gender, pronunciation: feminine (stem: Megamonad-), me-GA-mo-nas

Type species: Megamonas hypermegale corrig. (Harrison and Hansen 1963) Shah and Collins 1983

Conduct genome-based taxonomy of genus at TYGS

16S rRNA gene: Analyse FASTA

Effective publication: Shah HN, Collins MD. Reclassification of Bacteroides hypermegas (Harrison and Hansen) in a new genus Megamonas, as Megamonas hypermegas comb. nov. Zentralbl. Bakteriol. Parasitenkd. Infektionskr. Hyg. Abt. 1 Orig. 1982; C3:394-398. 🇬🇧

IJSEM list: Anonymous. Validation list no. 10. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1983; 33:438-440.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Notes:
  • 🧕 Boone et al. (2001) assigned this genus to the family Bacteroidaceae Pribram 1933 (Approved Lists 1980). Publication: Garrity GM, Holt JG. The Road Map to the Manual. In: Boone DR, Castenholz RW, Garrity GM (eds), Bergey's Manual of Systematic Bacteriology, second edition, vol. 1 (The Archaea and the deeply branching and phototrophic Bacteria), Springer-Verlag, New York, 2001, p. 119-166. 🇺🇸
  • 🧕 Marchandin et al. (2010) assigned this genus to the order Selenomonadales Marchandin et al. 2010. Publication: Marchandin H, Teyssier C, Campos J, Jean-Pierre H, Roger F, Gay B, Carlier JP, Jumas-Bilak E. Negativicoccus succinicivorans gen. nov., sp. nov., isolated from human clinical samples, emended description of the family Veillonellaceae and description of Negativicutes classis nov., Selenomonadales ord. nov. and Acidaminococcaceae fam. nov. in the bacterial phylum Firmicutes. Int J Syst Evol Microbiol 2010; 60:1271-1279. 🇫🇷
  • 🧕 Yilmaz et al. (2014) assigned this genus to the family Veillonellaceae Rogosa 1971 (Approved Lists 1980). Publication: Yilmaz P, Parfrey LW, Yarza P, Gerken J, Pruesse E, Quast C, Schweer T, Peplies J, Ludwig W, Glöckner FO. The SILVA and “all-species living tree project (LTP)” taxonomic frameworks. Nucleic Acids Research 2014; 42(D1):D643-D648. 🇩🇪
  • 🚋 The type species of this genus has alternatively been placed in the genus Bacteroides Castellani and Chalmers 1919 (Approved Lists 1980). Publication: Harrison APJ, Hansen PA. Bacteroides hypermegas nov. spec. Antonie Van Leeuwenhoek 1963; 29:22-28.
  • 🎰 The BRCs most frequently used for deposits in this group are: DSM: 4; ATCC: 2; NCTC: 2; LMG: 2; CCUG: 2; CIP: 1; JCM: 1.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Animal classification RG: 1 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No - Containment level: Containment Level 1". — The risk group for Taiwan has been imported on 2024-11-03. The full classification is: risk group = 1, note = "P650 = v". — 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.
  • 🧍 Pittman et al. (1991) suggested the abbreviation "MGMN" for this genus name but this does not appear to be of practical relevance any longer. Publication: Pittman KF, Walczak CA, Lock CM. Codes and abbreviations for approved of effectively published names of genera of bacteria published from January 1980 to December 1990. Int J Syst Bacteriol 1991; 41:571-579.
  • 🧍 See also Morotomi et al. (2007). Publication: Morotomi M, Nagai F, Sakon H. Genus Megamonas should be placed in the lineage of Firmicutes; Clostridia; Clostridiales; 'Acidaminococcaceae'; Megamonas. Int J Syst Evol Microbiol 2007; 57:1673-1674. 🇯🇵

Subdivision:

Number of child taxa with a validly published and correct name: 3
Number of child taxa with a validly published name, including synonyms: 3
Total number of child taxa: 5

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Megamonas funiformis Sakon et al. 2008	validly published under the ICNP	correct name
    "Candidatus Megamonas gallistercoris" Gilroy et al. 2021	not validly published	pro-correct name
    Megamonas hypermegale corrig. (Harrison and Hansen 1963) Shah and Collins 1983	validly published under the ICNP	correct name
    Megamonas hypermegas (Harrison and Hansen 1963) Shah and Collins 1983	inaccurate spelling	misspelling
    Megamonas rupellensis Chevrot et al. 2008	validly published under the ICNP	correct name

Parent taxon: Selenomonadaceae Campbell et al. 2015

Assigned by: Campbell C, Adeolu M, Gupta RS. Genome-based taxonomic framework for the class Negativicutes: division of the class Negativicutes into the orders Selenomonadales emend., Acidaminococcales ord. nov. and Veillonellales ord. nov. Int J Syst Evol Microbiol 2015; 65:3203-3215. 🇨🇦

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Record number: 516029