Name: Hormogoneae Cavalier-Smith 2002

Category: Class

Proposed as: class. nov.

Etymology: Hor.mo.go’ne.ae. Gr. masc. n. hormos, cord; Gr. masc. n. gonos, offspring; L. fem. pl. n. suff. -ae, ending sometimes inaccurately used for class or phylum names; N.L. fem. pl. n. Hormogoneae, group of bacteria which multiply by hormogonia [incorrectly formed: implied type unavailable]

Pronunciation (Latin), gender: hor-mo-GO-ne-a͡e, feminine

Type order: Nostocales Cavalier-Smith 2002

Valid publication: Cavalier-Smith T. The neomuran origin of archaebacteria, the negibacterial root of the universal tree and bacterial megaclassification. Int J Syst Evol Microbiol 2002; 52:7-76. 🇬🇧

IJSEM list: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 52, part 1 of the IJSEM. Int J Syst Evol Microbiol 2002; 52:293-295.

Nomenclatural status: validly published under the ICNP, rejected name, later homonym

Taxonomic status: synonym

Correct name: Chroococcophyceae Hollerbach et al. 1953

• Synonyms:

  • Name	Kind
    "Chroococcophyceae" Proshkina-Lavrenko and Makarova 1968	heterotypic synonym, not validly published
    "Chroococcophyceae" Starmach 1966	heterotypic synonym, not validly published
    "Chroococcophyceae" Wartenberg 1972	heterotypic synonym, not validly published
    Cyanophycoidea Walton 1931	heterotypic synonym, validly published under the ICN (Botanical Code), descriptive name
    Cyanophyceae Schaffner 1909	heterotypic synonym, validly published under the ICN (Botanical Code), illegitimate name, later homonym
    Cyanophyceae Bennett and Murray 1889	heterotypic synonym, validly published under the ICN (Botanical Code), illegitimate name, later homonym
    Cyanophyceae Hauck 1885	heterotypic synonym, validly published under the ICN (Botanical Code), descriptive name
    Nostocophyceae Christensen 1978	heterotypic synonym, validly published under the ICN (Botanical Code)
    Oxyphotobacteria (ex Gibbons and Murray 1978) Murray 1988	heterotypic synonym, validly published under the ICNP, rejected name
    Gloeobacteria Cavalier-Smith 2002	heterotypic synonym, validly published under the ICNP, rejected name
    Chroobacteria Cavalier-Smith 2002	heterotypic synonym, validly published under the ICNP, rejected name
    Chamaesiphonophyceae Hollerbach et al. 1953	heterotypic synonym, validly published under the ICN (Botanical Code)
    Chroococcophyceae Hollerbach et al. 1953	heterotypic synonym, validly published under the ICN (Botanical Code)
    "Prochlorophyceae" Lewin 1977	heterotypic synonym, not validly published
    Chamaesiphonophyceae Starmach 1966	heterotypic synonym, validly published under the ICN (Botanical Code), illegitimate name
    "Pleurocapsophyceae" Starmach 1966	heterotypic synonym, not validly published

• Notes:
  • 🛺 The type order of this class has been placed in the class Chroococcophyceae Hollerbach et al. 1953. Publication: Aleksovski B, Krstić S, Guiry MD. The names of phyla and classes of blue-green algae (cyanobacteria, cyanophytes) and a typified name: Cyanobacteriophyta Oren, Mareš et Rippka. Fottea 2025; 25:212-217. 🇮🇪
  • 🚃 The type order of this class has alternatively been placed in the class Cyanophyceae Hauck 1885. Publication: Hoffmann L, Komárek J, Kaštovský J. System of cyanoprokaryotes (cyanobacteria) – state in 2004. Algol. Stud. 2005; 117:95-115. 🇱🇺
  • 🚃 The type order of this class has alternatively been placed in the class Cyanophyceae Hauck 1885. Publication: Strunecky O, Ivanova AP, Mares J. An updated classification of cyanobacterial orders and families based on phylogenomic and polyphasic analysis. J Phycol 2023; 59:12-51. 🇨🇿
  • 🙄 This taxon name is occasionally misprinted (or affected by an OCR error) in some sources as: "Hormogeneae".
  • 😡 This taxon name is a homonym of Hormogoneae Hollerbach et al. 1953.
  • 🧍 Cyanobacteria validly published under the bacteriological code. — 🧍 The class Hormogoneae Cavalier-Smith 2002 is illegitimate because the type order Nostocales Cavalier-Smith 2002 is illegitimate. Publication: Oren A, Arahal DR, Christensen H, Goker M, Manaia CM, Moore ERB. International Code of Nomenclature of Prokaryotes. Prokaryotic Code (2025 Revision). Int J Syst Evol Microbiol 2026; 76:6979. 🇮🇱
  • 🧍 Irregularly formed name (not formed from the stem of the name of the nomenclatural type). Rejected Name (Judicial Commission, Opinion 79 suppl.; IJSEM 64: 3599–3602), see Tindall (2014). Publication: Tindall BJ. Names at the rank of class, subclass and order, their typification and current status: Supplementary information to Opinion 79. Judicial Commission of the International Committee on Systematics of Prokaryotes. Int J Syst Evol Microbiol 2014; 64:3599-3602. 🇩🇪

Parent taxon: Cyanobacteriota Oren et al. 2022

Assigned by: LPSN automated production system. The following publication is only one of the sources consulted. It may or may not mention this taxon name. — Aleksovski B, Krstić S, Guiry MD. The names of phyla and classes of blue-green algae (cyanobacteria, cyanophytes) and a typified name: Cyanobacteriophyta Oren, Mareš et Rippka. Fottea 2025; 25:212-217. 🇮🇪

Linking: To permanently link to this page, use https://lpsn.dsmz.de/class/hormogoneae-1Copy to clipboardLink copied to clipboard

Record number: 47