Name: Paenalicyclobacillus Sinninghe Damsté et al. 2026

Category: Genus

Proposed as: gen. nov.

Etymology: Paen.a.li.cy.clo.ba.cil’lus. L. adv. paene, almost; N.L. masc. n. Alicyclobacillus, a bacterial genus name; N.L. masc. n. Paenalicyclobacillus, almost Alicyclobacillus

Gender, pronunciation (Latin): masculine (stem: Paenalicyclobacill-), pa͡en-a-li-ky-klo-ba-KIL-lus

Type species: Paenalicyclobacillus cycloheptanicus (Deinhard et al. 1988) Sinninghe Damsté et al. 2026

Effective publication: Sinninghe Damste JS, Villanueva L, Pukall R. A chemotaxonomic and phylogenomic re-evaluation of the genus Alicyclobacillus: A proposal for reclassification of about half of the species into the new genus, Paenalicyclobacillus gen. nov., with an emended description of the genus Alicyclobacillus, and recognition that the names Alicyclobacillus tengchongensis and Alicyclobacillus montanus are later heterotypic synonyms of Alicyclobacillus tolerans. Syst Appl Microbiol 2025; 48:126651. 🇳🇱

IJSEM list: Oren A, Göker M. Validation list no. 228. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2026; 76:7052.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym

Correct name: Alicyclobacillus Wisotzkey et al. 1992

• Synonyms:

  • Name	Kind
    Alicyclobacillus Wisotzkey et al. 1992	heterotypic synonym, validly published under the ICNP

• Notes:
  • 🚂 For the type species of this genus another name is in use, which is affiliated with the genus Alicyclobacillus Wisotzkey et al. 1992. Publication: Wisotzkey JD, Jurtshuk PJ, Fox GE, Deinhard G, Poralla K. Comparative sequence analyses on the 16S rRNA (rDNA) of Bacillus acidocaldarius, Bacillus acidoterrestris, and Bacillus cycloheptanicus and proposal for creation of a new genus, Alicyclobacillus gen. nov. Int J Syst Bacteriol 1992; 42:263-269.
  • 💁 Taxonomists who have recently focused on this group are the corresponding authors of Goto et al. (2003). Editors in search of reviewers are advised to consider additional criteria such as whether a taxon is covered by one of the ICSP subcommittees.
  • ❗ Paenalicyclobacillus 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).
  • 🎰 The BRCs most frequently used for deposits in this group are: DSM: 11; NBRC: 8; JCM: 8; IAM: 6; CGMCC: 4; KCTC: 3; ATCC: 3; CIP: 1; NRIC: 1; VKM: 1.

Subdivision:

Number of child taxa with a validly published and correct name: 0
Number of child taxa with a validly published name, including synonyms: 12
Total number of child taxa: 14

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    "Paenalicyclobacillus aeris" (Guo et al. 2009) Sinninghe Damsté et al. 2025	not validly published	synonym
    Paenalicyclobacillus cellulosilyticus (Kusube et al. 2014) Sinninghe Damsté et al. 2026	validly published under the ICNP	synonym
    Paenalicyclobacillus contaminans (Goto et al. 2007) Sinninghe Damsté et al. 2026	validly published under the ICNP	synonym
    Paenalicyclobacillus curvatus (Jiang et al. 2022) Sinninghe Damsté et al. 2026	validly published under the ICNP	synonym
    Paenalicyclobacillus cycloheptanicus (Deinhard et al. 1988) Sinninghe Damsté et al. 2026	validly published under the ICNP	synonym
    Paenalicyclobacillus disulfidooxidans (Dufresne et al. 1996) Sinninghe Damsté et al. 2026	validly published under the ICNP	synonym
    Paenalicyclobacillus ferrooxydans (Jiang et al. 2008) Sinninghe Damsté et al. 2026	validly published under the ICNP	synonym
    Paenalicyclobacillus herbarius (Goto et al. 2002) Sinninghe Damsté et al. 2026	validly published under the ICNP	synonym
    Paenalicyclobacillus kakegawensis (Goto et al. 2007) Sinninghe Damsté et al. 2026	validly published under the ICNP	synonym
    Paenalicyclobacillus macrosporangiidus (Goto et al. 2007) Sinninghe Damsté et al. 2026	validly published under the ICNP	synonym
    Paenalicyclobacillus mengziensis (Jiang et al. 2022) Sinninghe Damsté et al. 2026	validly published under the ICNP	synonym
    Paenalicyclobacillus pomorum (Goto et al. 2003) Sinninghe Damsté et al. 2026	validly published under the ICNP	synonym
    Paenalicyclobacillus shizuokensis (Goto et al. 2007) Sinninghe Damsté et al. 2026	validly published under the ICNP	synonym
    "Paenalicyclobacillus tolerans" (Karavaiko et al. 2005) Sinninghe Damsté et al. 2025	not validly published	synonym

Parent taxon: Alicyclobacillaceae da Costa and Rainey 2010

Assigned by: Sinninghe Damste JS, Villanueva L, Pukall R. A chemotaxonomic and phylogenomic re-evaluation of the genus Alicyclobacillus: A proposal for reclassification of about half of the species into the new genus, Paenalicyclobacillus gen. nov., with an emended description of the genus Alicyclobacillus, and recognition that the names Alicyclobacillus tengchongensis and Alicyclobacillus montanus are later heterotypic synonyms of Alicyclobacillus tolerans. Syst Appl Microbiol 2025; 48:126651. 🇳🇱

Linking: To permanently link to this page, use https://doi.org/10.83108/rn.67527Copy to clipboardLink copied to clipboard

Record number: 67527

• Previous versions:

  • Version	Date	JSON
    1	2026-03-31
    2	2026-07-13