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Taxon: Genus "Chroococcus" Nägeli 1849 nom. inval. (prokaryote)
 Entity: 

Authorship

SN2000 author citation:  C. Nägeli, 1849, nom. prok. post., nom. praeinit.
Subsequent use as a prokaryotic name:  Boone, D.R. & Castenholz, R.W. (eds.) 2001. In G.M. Garrity (ed.), Bergey's Man. Syst. Bacteriol. (ed. 2) 1: 495 (M. Herdman, R.W. Castenholz, I. Iteman, J.B. Waterbury & R. Rippka: key), 496 (R. Rippka, R.W. Castenholz, I. Iteman & M. Herdman: "Form-genus ... Nägeli 1849").

Etymology

Derived name: Chroobacteria (Class) Cavalier-Smith 2002 nom. rej. Ref: T. Cavalier-Smith, 2002a: tbl. 1 (p. 10). [new]
Derived name: Chroococcales (Order) Cavalier-Smith 2002 nom. illeg., nom. rej. Ref: T. Cavalier-Smith, 2002a: tbl. 1 (p. 10). [new]

Attributes

Prokaryotic name, by subsequent use (: nom. prok. post.) [ICNB/ICNP] Ref: S.J. Brands (comp.), 1989-present. Syst. Nat. 2000: 4 Dec 2025.
Prokaryotic name (: nom. prok.) [ICNB/ICNP] Ref: D.R. Boone & R.W. Castenholz (eds.), 2001. In G.M. Garrity (ed.), Bergey's Man. Syst. Bacteriol. (ed. 2) 1: 496 (R. Rippka, R.W. Castenholz, I. Iteman & M. Herdman).
Effectively, but not validly, published name (nom. inval.) [ICNP, 2019: Rule 25, App. 7 (IJSEM)] Ref: G.M. Garrity et al. 2007. Taxon. Outl. Bacteria Archaea (v. 7.7, pt. 2): 44.
Pre-starting-point name (nom. inval.[: praeinit.]) [ICNP, 2022: Rules 23a Note 3, 24a (<1980)] Ref: S.J. Brands (comp.), 1989-present. Syst. Nat. 2000: 4 Dec 2025.

Types

Type, by original designation, of: Chroococcales (Order) Cavalier-Smith 2002 nom. illeg., nom. rej. Ref: T. Cavalier-Smith, 2002a: tbl. 1 (p. 10). [new]

Variants

Validly published name: Chroococcus (Genus) Nägeli 1849 Ref: LPSN, 2020-present: [5 Jan 2026]; 5 Jan 2026. [inferred]
Name in original code of nomenclature: Chroococcus (Genus) C. Nägeli (1849)
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Last updated: 28 Aug 2026