Name: Exilispira Imachi et al. 2008

Category: Genus

Proposed as: gen. nov.

Etymology: E.xi.li.spi’ra. L. masc./fem. adj. exilis, slender; Gr. fem. n. speîra, helix; N.L. fem. n. Exilispira, slender helix, referring to the cell shape

Gender, pronunciation (Latin): feminine (stem: Exilispir-), e-xi-li-SPI-ra

Type species: Exilispira thermophila Imachi et al. 2008

Conduct genome-based taxonomy of genus at TYGS

16S rRNA gene: Analyse FASTA

Valid publication: Imachi H, Sakai S, Hirayama H, Nakagawa S, Nunoura T, Takai K, Horikoshi K. Exilispira thermophila gen. nov., sp. nov., an anaerobic, thermophilic spirochaete isolated from a deep-sea hydrothermal vent chimney. Int J Syst Evol Microbiol 2008; 58:2258-2265. 🇯🇵

IJSEM list: Euzeby JP. Notification list. Notification that new names and new combinations have appeared in volume 58, part 10 of the IJSEM. Int J Syst Evol Microbiol 2009; 59:3-4.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

• Notes:
  • 🧕 Imachi et al. (2008) assigned this genus to the class Spirochaetes Cavalier-Smith 2002. Publication: Imachi H, Sakai S, Hirayama H, Nakagawa S, Nunoura T, Takai K, Horikoshi K. Exilispira thermophila gen. nov., sp. nov., an anaerobic, thermophilic spirochaete isolated from a deep-sea hydrothermal vent chimney. Int J Syst Evol Microbiol 2008; 58:2258-2265. 🇯🇵
  • 🧕 Yilmaz et al. (2014) assigned this genus to the order Spirochaetales Buchanan 1917 (Approved Lists 1980). Publication: Yilmaz P, Parfrey LW, Yarza P, Gerken J, Pruesse E, Quast C, Schweer T, Peplies J, Ludwig W, Glöckner FO. The SILVA and “all-species living tree project (LTP)” taxonomic frameworks. Nucleic Acids Research 2014; 42(D1):D643-D648. 🇩🇪
  • 🎰 The BRCs most frequently used for deposits in this group are: NBRC: 1; JCM: 1; DSM: 1; KCTC: 1.

Subdivision:

Number of child taxa with a validly published and correct name: 1
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
    Exilispira thermophila Imachi et al. 2008	validly published under the ICNP	correct name

Parent taxon: [Spirochaetia, not assigned to family]

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: 517820