Name: Rivulariopsis (Kirchner 1898) Woronichin 1923

Category: Genus

Proposed as: gen. nov.

Etymology: Ri.vu.la.ri.op’sis. N.L. fem. n. Rivularia, a cyanobacterial genus; Gr. fem. n. opsis, aspect, appearance; N.L. fem. n. Rivulariopsis, a Rivularia-like genus

Gender, pronunciation (Latin): feminine (stem: Rivulariopsid-), ri-wu-la-ri-OP-sis

Type species: Rivulariopsis floccosa Woronichin 1923

Valid publication: Woronichin NN. Cyanophyceae. Algae nonnullae novae e Caucaso II. Botanicheskie Materialy Instituta Sporovykh Rastenij Glavnogo Botanicheskogo Sada R.S.F.S.R. 1923; 2:113-116.

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

Taxonomic status: synonym

Correct name: Calothrix Agardh ex Bornet and Flahault 1886

• Synonyms:

  • Name	Kind
    "Calothrix" Agardh 1824	heterotypic synonym, not validly published
    Calothrix Agardh ex Bornet and Flahault 1886	heterotypic synonym, validly published under the ICN (Botanical Code)

• Notes:
  • 🧕 Komarek and Golubic (1990) assigned this genus to the family Rivulariaceae Rabenhorst ex Bornet and Flahault 1886. Publication: Komárek J, Golubić S. Guide to the Nomenclature and formal taxonomic treatment of oxyphototroph prokaryotes (Cyanoprokaryotes). Published by the Authors, Třeboň and Boston, 1990.
  • 🚂 For the type species of this genus another name is in use, which is affiliated with the genus Calothrix Agardh ex Bornet and Flahault 1886. Publication: Geitler L. Synoptische Darstellung der Cyanophyceen in morphologischer und systematischer Hinsicht. Beihefte zum Botanischen Centralblatt 1925; 41:163-294.
  • 🙄 This taxon name is occasionally misprinted (or affected by an OCR error) in some sources as: "Rivalariopsis"; "Rivuiariopsis".
  • ❗ Rivulariopsis is the correct name instead if this genus is regarded as a separate genus (i.e., if its nomenclatural type is not assigned to another genus whose name is validly published, legitimate and not rejected and has priority).

Subdivision:

Number of child taxa with a validly published and correct name: 0
Number of child taxa with a validly published name, including synonyms: 1
Total number of child taxa: 1

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Rivulariopsis floccosa Woronichin 1923	validly published under the ICN (Botanical Code)	synonym

Parent taxon: Calotrichaceae corrig. Cooke 1890

Assigned by: Freese HM, Meier-Kolthoff JP, Sarda Carbasse J, Afolayan AO, Goker M. TYGS and LPSN in 2025: a Global Core Biodata Resource for genome-based classification and nomenclature of prokaryotes within DSMZ Digital Diversity. Nucleic Acids Res 2026; 54:D884-D891. 🇩🇪

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Record number: 17878