SeqCode Registry
Register List https://seqco.de/r:rmu87cu5 [2025]

Regnicoccus gen. nov. and Regnicoccus antarcticus comb. nov.

Submitted by Rodriguez-R, Luis M

Genus Regnicoccus

Etymology
[Reg.ni.coc'cus] L. neut. n. regnum, rule, dominion or control, referring to an abundant organism; N.L. masc. n. coccus, a coccus; N.L. masc. n. Regnicoccus, referring to an abundant coccus
Nomenclatural type
Species Regnicoccus antarcticusTs
Description
Ernster, Rodriguez-R, 2025: The genus Regnicoccus was proposed by Walter et al., 2017 on the basis of genomic analyses, and is part of “Cyanobiaceae” if considered a separate family (Panwar et al., 2022) or part of Synecococcaceae otherwise.
Classification
Bacteria » Cyanobacteriota » Cyanophyceae » “Synechococcales” » Synechococcaceae » Regnicoccus
References
Effective publication: Ernster, Rodriguez-R, 2025 [1]
Original (not valid) publication: Walter et al., 2017 [2] and Coutinho et al., 2016 [3]
Assigned taxonomically: Walter et al., 2017 [2]
Registry URL
https://seqco.de/i:23580

Species Regnicoccus antarcticusTs

Etymology
[ant.arc'ti.cus] L. masc. adj. antarcticus, referring to the increased abundance of this organism at the Antarctic province
Nomenclatural type
NCBI Assembly: GCA_049578805.1 Ts
Reference Strain
Strain sc|0038565: WH 5701 = SYN = CCMP 1333 = NEPCC 539
Description
Ernster, Rodriguez-R, 2025: The genome assembly is established as type material, and the reference strain is WH 5701.

Coutinho et al., 2016: The phycobilisome pigmentation of this strain belongs to class 1. Bacteriocin gene clusters detected in this genome belong to class I. Type strain is WH5701(T), which has a genome of 3.28 Mbp with a GC content of 65.4% that encodes 3185 genes that include 593 diagnostic orthologous groups. Taxonomic affiliation to Parasynechococcus antarcticus WH5701 can be defined by the presence of Ammonium transporter, Ferric iron ABC transporter: ATP-binding protein, Ferric iron ABC transporter: iron-binding protein, Ferric iron ABC transporter: permease protein, Ferrous iron transport protein B, GlnN, NifS, NifU, Nitrate ABC transporter, PiuC, Protein PII, UreD, UreE, UreF, UreG, UrtA, UrtB, UrtC, UrtD, UrtE, phnE, phoB, phoH, phoR, pstA, pstB, pstC, pstS.

Walter et al., 2017: This species is characterized by α-carboxysome. Type strain is WH 5701, isolated from marine habitat in Long Island Sound, Connecticut, USA. The genome of this strain contains 3.28 Mbp (GC = 65.4%) harboring 2,917 coding DNA sequences. 
Classification
Bacteria » Cyanobacteriota » Cyanophyceae » “Synechococcales” » Synechococcaceae » Regnicoccus » Regnicoccus antarcticusTs
References
Effective publication: Ernster, Rodriguez-R, 2025 [1]
Original (not valid) publication: Coutinho et al., 2016 [3] and Walter et al., 2017 [2]
Assigned taxonomically: Walter et al., 2017 [2]
Registry URL
https://seqco.de/i:23582

References

  1. Ernster, Rodriguez-R (2025). A practical guide on environmental genomics for prokaryotic systematics. Systematic and Applied Microbiology. DOI:10.1016/j.syapm.2025.126643
  2. Walter et al. (2017). Ecogenomics and Taxonomy of Cyanobacteria Phylum. Frontiers in Microbiology. DOI:10.3389/fmicb.2017.02132
  3. Coutinho et al. (2016). Proposal of fifteen new species of Parasynechococcus based on genomic, physiological and ecological features. Archives of Microbiology. DOI:10.1007/s00203-016-1256-y

Register List Certificate of Validation

On behalf of the Committee on the Systematics of Prokaryotes Described from Sequence Data (SeqCode Committee), we hereby certify that the Register List seqco.de/r:rmu87cu5 submitted by Rodriguez-R, Luis M and including 2 new names has been successfully validated.


Date of Priority: 2025-08-06 02:24 UTC
DOI: 10.57973/seqcode.r:rmu87cu5