Name: Chroococcophyceae Hollerbach et al. 1953

Category: Class

Proposed as: class. nov.

Etymology: Chro.o.coc.co.phy’ce.ae. N.L. fem. pl. n. Chroococcophyceae, the Chroococcus class

Pronunciation, gender: k^hro-o-kok-ko-P^HY-ke-a͡e, feminine

Type genus: Chroococcus Nägeli 1849

Valid publication: Hollerbach MM, Kosinskaya EK, Polyansky VI. Sinezelenye vodorosli. In: Anonymous NN (eds), Opredelitel presnovodnykh vodoroslej SSSR, Sovetskaya Nauka, Moskva, 1953, p. 652.

Nomenclatural status: validly published under the ICN (Botanical Code)

Taxonomic status: correct name

• Synonyms:

  • Name	Kind
    "Chroococcophyceae" Starmach 1966	homotypic synonym, not validly published
    "Chroococcophyceae" Proshkina-Lavrenko and Makarova 1968	homotypic synonym, not validly published
    "Chroococcophyceae" Wartenberg 1972	homotypic 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)
    "Prochlorophyceae" Lewin 1977	heterotypic synonym, not validly published
    Chamaesiphonophyceae Starmach 1966	heterotypic synonym, validly published under the ICN (Botanical Code), illegitimate name
    Hormogoneae Cavalier-Smith 2002	heterotypic synonym, validly published under the ICNP, rejected name, later homonym
    "Pleurocapsophyceae" Starmach 1966	heterotypic synonym, not validly published

• Notes:
  • 🧒 Hollerbach et al. (1953) assigned the genus Chroococcus Nägeli 1849 to this class. Publication: Hollerbach MM, Kosinskaya EK, Polyansky VI. Sinezelenye vodorosli. In: Anonymous NN (eds), Opredelitel presnovodnykh vodoroslej SSSR, Sovetskaya Nauka, Moskva, 1953, p. 652.
  • 🚃 The type genus of this class has alternatively been placed in the class "Cyanobacteria". 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. 🇺🇸
  • 🙄 This taxon name is occasionally misprinted (or affected by an OCR error) in some sources as: "Cbroococcophyceae"; "Chmococcophyceae"; "Chrooccophyceae"; "Chroocophyceae".
  • 🎰 The BRCs most frequently used for deposits in this group are: CBFS: 84; SP: 74; BRY: 69; CCALA: 63; PCC: 62; BRNM: 56; FCME: 42; SAG: 31; UC: 31; US: 30.
  • 🧍 According to Silva (1980) this is a segregate class included in Cyanophyceae Schaffner 1909. Publication: Silva PC. Names of classes and families of living algae with special reference to their use in the Index Nominum Genericorum (Plantarum). Bohn, Scheltema & Holkema, Utrecht, 1980.

Subdivision:

Number of child taxa with a validly published and correct name: 22
Number of child taxa with a validly published name, including synonyms: 44
Total number of child taxa: 77

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    "Acaryochloridales" Miyashita et al. 2003	not validly published	synonym
    "Acaryochloridales" Strunecký and Mareš 2023	not validly published	preferred name
    Aegeococcales Strunecký and Mareš 2023	validly published under the ICN (Botanical Code)	correct name
    Aerosakkonematales Lefler et al. 2024	validly published under the ICN (Botanical Code)	synonym
    "Alveoliales" corrig. Konyushkov 1978	not validly published	preferred name
    "Alveolida" Konyushkov 1978	inaccurate spelling	misspelling
    "Bulliales" corrig. Konyushkov 1978	not validly published	preferred name
    "Bulliida" Konyushkov 1978	inaccurate spelling	misspelling
    Chroococcaceae Bennett and Murray 1889	inaccurate spelling and illegitimate (ICN [Botanical Code])	misspelling
    Chroococcales Schaffner 1922	validly published under the ICN (Botanical Code), illegitimate name	synonym
    Chroococcales corrig. Ardissone 1886	validly published under the ICN (Botanical Code)	correct name
    Chroococcales Frémy 1930	validly published under the ICN (Botanical Code), illegitimate name	synonym
    Chroococcales Geitler 1925	validly published under the ICN (Botanical Code), illegitimate name	synonym
    Chroococcales corrig. Bennett and Murray 1889	validly published under the ICN (Botanical Code), illegitimate name	synonym
    Chroococcales Cavalier-Smith 2002	validly published under the ICNP, rejected name	synonym
    Chroococcidiopsidales Komárek et al. 2014	validly published under the ICN (Botanical Code)	correct name
    Chroococcoideae Ardissone 1886	inaccurate spelling (ICN [Botanical Code])	misspelling
    Chroococcoideae Wettstein 1901	inaccurate spelling and illegitimate (ICN [Botanical Code])	misspelling
    [Chroococcophyceae, not assigned to order]	artificial parent node of taxa incertae sedis
    Coleofasciculales Strunecký and Mareš 2023	validly published under the ICN (Botanical Code)	correct name
    "Cyanobacteriales" Rippka and Cohen-Bazire 1983	not validly published	synonym
    Dermocarpales Geitler 1925	validly published under the ICN (Botanical Code)	synonym
    Desertifilales Strunecký and Mareš 2023	validly published under the ICN (Botanical Code)	correct name
    Elainellales Chuvochina et al. 2024	validly published under the ICNP	synonym
    Epiphytales Korde 1973	validly published under the ICN (Botanical Code)	correct name
    Geitlerinematales Strunecký and Mareš 2023	validly published under the ICN (Botanical Code)	correct name
    "Gloeobacterales" Cavalier-Smith 2002	not validly published	preferred name
    Gloeomargaritales Moreira et al. 2017	validly published under the ICN (Botanical Code)	correct name
    Gomontiellales Strunecký and Mareš 2023	validly published under the ICN (Botanical Code)	correct name
    "Gomontiellales" Claus 1959	not validly published	synonym
    Graniferales Vologdin 1962	validly published under the ICN (Botanical Code)	correct name
    Janisjarviales corrig. Konyushkov 1978	validly published under the ICN (Botanical Code)	correct name
    Janisjarviida Konyushkov 1978	inaccurate spelling (ICN [Botanical Code])	misspelling
    Kenellales Korde 1973	validly published under the ICN (Botanical Code), illegitimate name	synonym
    Leptolyngbyales Strunecký and Mareš 2023	validly published under the ICN (Botanical Code)	correct name
    Leptolyngbyales Chuvochina et al. 2024	validly published under the ICNP, illegitimate name	synonym
    "Limnotrichales" Trebuch et al. 2020	not validly published	synonym
    Neosynechococcales Chuvochina et al. 2024	validly published under the ICNP	synonym
    "Neosynechococcales" Salazar et al. 2020	not validly published	synonym
    Nodosilineales Strunecký and Mareš 2023	validly published under the ICN (Botanical Code)	correct name
    Nostocales corrig. Walton 1931	validly published under the ICN (Botanical Code), illegitimate name	synonym
    Nostocales Geitler 1925	validly published under the ICN (Botanical Code), illegitimate name	synonym
    "Nostocales" corrig. Thuret 1886	not validly published	synonym
    Nostocales Cavalier-Smith 2002	validly published under the ICNP, rejected name	synonym
    Nostocales corrig. Borzì 1914	validly published under the ICN (Botanical Code)	correct name
    "Nostochinae" Endlicher 1836	inaccurate spelling	misspelling
    Nostochinae Borzì 1914	inaccurate spelling (ICN [Botanical Code])	misspelling
    "Nostochineae" Thuret 1886	inaccurate spelling	misspelling
    Nostocidea Walton 1931	inaccurate spelling and illegitimate (ICN [Botanical Code])	misspelling
    Oculatellales Strunecký and Mareš 2023	validly published under the ICN (Botanical Code)	correct name
    Omachteniales corrig. Konyushkov 1978	validly published under the ICN (Botanical Code)	correct name
    Omachtenida Konyushkov 1978	inaccurate spelling (ICN [Botanical Code])	misspelling
    "Oscillariaceae" Bennett and Murray 1889	inaccurate spelling	misspelling
    "Oscillariales" corrig. Bennett and Murray 1889	not validly published	synonym
    Oscillatoriales Copeland 1936	validly published under the ICN (Botanical Code), illegitimate name	synonym
    Oscillatoriales Cavalier-Smith 2002	validly published under the ICNP, rejected name	synonym
    Oscillatoriales Schaffner 1922	validly published under the ICN (Botanical Code)	correct name
    Pelonematales Skuja 1956	validly published under the ICN (Botanical Code)	correct name
    Phormidesmales Chuvochina et al. 2024	inaccurate spelling	misspelling
    "Phormidesmiales" Salazar et al. 2020	inaccurate spelling	misspelling
    Phormidesmidales corrig. Chuvochina et al. 2024	validly published under the ICNP	synonym
    "Phormidesmidales" corrig. Salazar et al. 2020	not validly published	synonym
    Pleurocapsales Geitler 1925	validly published under the ICN (Botanical Code)	synonym
    Pleurocapsales Cavalier-Smith 2002	validly published under the ICNP, rejected name	synonym
    "Prochlorales" Lewin 1977	not validly published	synonym
    "Prochlorales" (ex Lewin 1977) Florenzano et al. 1986	not validly published	synonym
    Prochlorotrichales Strunecký and Mareš 2023	validly published under the ICN (Botanical Code)	correct name
    "Pseudanabaenales" Hoffmann et al. 2005	not validly published	preferred name
    Sarmaellales Vologdin 1962	validly published under the ICN (Botanical Code)	correct name
    Siphononematales corrig. Walton 1931	validly published under the ICN (Botanical Code)	synonym
    Siphononematidea Walton 1931	inaccurate spelling (ICN [Botanical Code])	misspelling
    Spirulinales Komárek et al. 2014	validly published under the ICN (Botanical Code)	correct name
    Stigonematales corrig. Walton 1931	validly published under the ICN (Botanical Code)	synonym
    Stigonematales (ex Geitler 1925) Cavalier-Smith 2002	validly published under the ICNP, rejected name	synonym
    Stigonematidea Walton 1931	inaccurate spelling (ICN [Botanical Code])	misspelling
    "Synechococcales" Hoffmann et al. 2005	not validly published	preferred name
    Thermostichales Komárek et al. 2020	validly published under the ICN (Botanical Code)	correct name

Parent taxon: Cyanobacteriota Oren et al. 2022

Assigned by: 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. 🇮🇪

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Record number: 6075