Name: Placoma Schousboe ex Bornet and Thuret 1876

Category: Genus

Proposed as: gen. nov.

Etymology: N.L. fem. n. Placoma, (is a Greek neuter noun, but botanical tradition has treated it as a feminine noun)

Gender: feminine (stem: Placom-)

Type species: Placoma vesiculosa corrig. Schousboe ex Bornet and Thuret 1876

Valid publication: Bornet É, Thuret G. Notes algologiques recueil d'observations sur les algues. Fasc. 1. G. Masson, Paris, 1876.

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

Taxonomic status: synonym

Correct name: Cyanoplacoma Molinari and Guiry 2021

• Synonyms:

  • Name	Kind
    Cyanoplacoma Molinari and Guiry 2021	homotypic synonym, validly published under the ICN (Botanical Code)

• Notes:
  • Strunecky et al. (2023) assigned this genus to the family Chroococcaceae Rabenhorst 1863. 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.
  • For the type species of this genus another name is in use, which is affiliated with the genus Cyanoplacoma Molinari and Guiry 2021. Publication: Molinari EA, Guiry MD. [Title pending]. Notulae algarum 2021; 183:2.
  • This taxon name is occasionally misprinted in some sources as: "Placama"; "Placpma".
  • Later homonym of Placoma Gmelin 1791 (Rubiaceae). Publication: Molinari EA, Guiry MD. [Title pending]. Notulae algarum 2021; 183:2.

Subdivision:

Number of child taxa with a validly published and correct name: 0
Number of child taxa with a validly published name, including synonyms: 5
Total number of child taxa: 7

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Placoma adriatica (Hauck 1885) Umezaki and Watanabe 1994	validly published under the ICN (Botanical Code), illegitimate name	in need of a replacement
    Placoma micrococca (Hansgirg 1892) Umezaki and Watanabe 1994	validly published under the ICN (Botanical Code), illegitimate name	synonym
    Placoma regulare Broady and Ingerfeld 1991	inaccurate spelling (ICN [Botanical Code])	misspelling
    Placoma regularis corrig. Broady and Ingerfeld 1991	validly published under the ICN (Botanical Code), illegitimate name	synonym
    Placoma vesicata Schousboe ex Bornet and Thuret 1876	inaccurate spelling (ICN [Botanical Code])	misspelling
    Placoma vesiculosa corrig. Schousboe ex Bornet and Thuret 1876	validly published under the ICN (Botanical Code), illegitimate name	synonym
    Placoma willei Gardner 1927	validly published under the ICN (Botanical Code), illegitimate name	synonym

Parent taxon: Entophysalidaceae Geitler 1925

Assigned by: Komárek J, Kaštovský J, Mareš J, Johansen JR. Taxonomic classification of cyanoprokaryotes (cyanobacterial genera) 2014, using a polyphasic approach. Preslia 2014; 86:295-335.

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Record number: 6482