Anisomitus

Citation

Formal styling

Anisomitus Kiran et al., 2026

Effective publication

Kiran et al., 2026

SeqCode status

Valid (SeqCode)

Register List

seqco.de/r:zlg3gn05 (validated)

Canonical URL

https://seqco.de/i:51462

Nomenclature

Rank

Genus

Inferred stem

Anisomit-

Syllabication

A.ni.so.mi'tus

Etymology

Gr. masc. adj. anisos, uneven; Gr. masc. n. mitos, thread; N.L. masc. n. Anisomitus, referring to uneven filamentous form

Nomenclatural type

Anisomitus miae^Ts

Nomenclatural status

Validly published under the SeqCode

Taxonomy

Description

Genus of bacteria commonly referred to as Segmented filamentous bacteria (SFB); known also as Candidatus Arthromitus (greek for “jointed thread”), as proposed by Snel et al. (1995). However, "Arthromitus" describes a non-SFB bacteria (Thompson et al., 2012). The genus name Anisomitus (greek for “uneven thread”) was chosen in keeping with the spirit of a morphologically descriptive name for SFB and in recognition of the work by the French zoologist Pierre-Paul Grassé who, in 1925, was the first to describe SFB attached to the intestinal epithelium of a vertebrate, the domestic duck (Grassé, 1925). SFB are Gram variable and spore-forming bacteria that form a monophyletic group in the Clostridiaceae, based on 16S rRNA gene sequence analysis. SFB grow from unicellular bacteria of approximately 1 micrometer in length into filaments reaching over 80 micrometer in length. Particular characteristics include a tip-like structure, present on both the unicellular and filamentous forms, as well as a biphasic filament morphology of thin and smooth to thick and bulbous as the filament ages and unicellular bacteria develop inside the filament to either form spores or to be released from the filament as intracellular offspring. The genus is represented by closed genome sequences of SFB from mice and rat as well as metagenome-assembled genomes from the gut of humans and other vertebrates. Genomes are reduced and range in size from approximately 1.5 to 1.7 Mb, lack nearly all components of the TCA cycle, but include genes involved in flagella synthesis and chemotaxis.

Classification

Bacteria » Bacillota » Clostridia » Eubacteriales » Clostridiaceae » Anisomitus

Parent

Clostridiaceae

Children (1)

• Anisomitus miae^Ts

Metadata

Outside links and data sources

• Wikispecies: Anisomitus

Search sequences

• Seach in NCBI Nucleotide

Local history

• This name was last modified 3 days ago
• Submission process status
• Quality checks before valid publication

Registered

10 months ago and claimed 8 months ago by Schnupf, Pamela

Submitted

8 months ago by Schnupf, Pamela

Curators

• Palmer, Marike
• St. John, Emily (nomenclature)
• Rodriguez-R, Luis M (genomics)

Endorsed

5 months ago by Rodriguez-R, Luis M

Validated

3 days ago by Rodriguez-R, Luis M

Date of priority

2026-05-11 12:21 PM (UTC)