Name: Myxococcus macrosporus (Krzemieniewska and Krzemieniewski 1926) Zahler and McCurdy 1974 (Approved Lists 1980)

Category: Species

Proposed as: comb. nov.

Basonym: "Chondrococcus macrosporus" Krzemieniewska and Krzemieniewski 1926

Etymology: ma.cro’spo.rus. Gr. masc. adj. makros, long, large; Gr. fem. n. spora, a seed and in biology a spore; N.L. masc. adj. macrosporus, with large spore

Pronunciation, gender: ma-KRO-spo-rus, masculine

Type strain: Cc m8; CIP 109128; DSM 14697; JCM 12621

Conduct genome-based taxonomy at

16S rRNA gene: AJ233921 Analyse FASTA

Effective publication: Zahler SA, McCurdy HD. Genus I. Myxococcus Thaxter 1892, 403. In: Buchanan RE, N.e G (eds), Bergey's Manual of Determinative Bacteriology, 8th ed., The Williams & Wilkins Co, Baltimore, 1974, p. 79-83.

IJSEM list: Skerman VBD, McGowan V, Sneath PHA. Approved lists of bacterial names. Int J Syst Bacteriol 1980; 30:225-420.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym

Correct name: Corallococcus macrosporus (Krzemieniewska and Krzemieniewski 1926) Reichenbach 2007

Risk group: 1

• Synonyms:

  • Name	Kind
    "Pseudomyxococcus macrosporus" (Krzemieniewska and Krzemieniewski 1926) Das et al. 2025	homotypic synonym, not validly published
    "Chondrococcus macrosporus" Krzemieniewska and Krzemieniewski 1926	homotypic synonym, not validly published, basonym of name in Approved Lists
    Corallococcus macrosporus (Krzemieniewska and Krzemieniewski 1926) Reichenbach 2007	homotypic synonym, validly published under the ICNP

• Notes:
  • ❗ Myxococcus macrosporus 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 Myxococcus.
  • 😷 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 Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 1. — The risk group for Germany has been imported on 2023-10-29. 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 6 times in PubMed until 2025-06-04.
  • 🧍 According to Yarza et al. (2013), an "un-sequenced orphan species where descriptions, illustrations or dead preserved material serve as the type. Strain designation appears to refer to herbarium material.". Publication: Yarza P, Sproer C, Swiderski J, Mrotzek N, Spring S, Tindall BJ, Gronow S, Pukall R, Klenk HP, Lang E, et al. Sequencing orphan species initiative (SOS): Filling the gaps in the 16S rRNA gene sequence database for all species with validly published names. Syst Appl Microbiol 2013; 36:69-73. 🇩🇪
  • 🧍 In 2005, H. Reichenbach [1] proposed the new combination Corallococcus macrosporus (basonym Myxococcus macrosporus). However, the type strain was designated as Cc m8 (= DSM 14697 = CIP 109128), not as strain Windsor M271. Consequently, in Validation List 115 [2], Corallococcus macrosporus was cited as Corallococcus macrosporus Reichenbach 2007, sp. nov. Publication: Reichenbach H. Genus II. Corallococcus gen. nov. (Chondrococcus Jahn 1924, 85). In: Brenner DJ, Krieg NR, Staley JT, Garrity GM (eds), Bergey's Manual of Systematic Bacteriology, second edition, vol. 2 (The Proteobacteria), part C (The Alpha-, Beta-, Delta-, and Epsilonproteobacteria), Springer, New York, 2005, p. 1079-1082. 🇺🇸
  • 🧍 The problem was addressed in a Request for an Opinion, which was approved by the Judicial Commission (Opinion 102). Publication: Lang E, Stackebrandt E. Emended descriptions of the genera Myxococcus and Corallococcus, typification of the species Myxococcus stipitatus and Myxococcus macrosporus and a proposal that they be represented by neotype strains. Request for an Opinion. Int J Syst Evol Microbiol 2009; 59:2122-2128. 🇩🇪

Parent taxon: Myxococcus Thaxter 1892 (Approved Lists 1980)

Assigned by: Zahler SA, McCurdy HD. Genus I. Myxococcus Thaxter 1892, 403. In: Buchanan RE, N.e G (eds), Bergey's Manual of Determinative Bacteriology, 8th ed., The Williams & Wilkins Co, Baltimore, 1974, p. 79-83.

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Record number: 778565