Name: "Actinotignum cystesis" Winterflood et al. 2026

Category: Species

Proposed as: sp. nov.

Etymology: cys.te’sis. L. gen. n. cystesis, from a bladder

Gender: neuter

Nomenclatural type: CCUG 77579; LMG 33441; usb_actsch_34

Conduct genome-based taxonomy at

16S rRNA gene: PV889331 Analyse FASTA

Original publication: Winterflood DM, Segui-Crespi G, Peeters C, Lang C, Ivan B, Keller PM, Schlaepfer P, Moore ERB, Vandamme P, Goldenberger D. Whole-genome sequence analyses reveal cryptic species-level diversity among clinical Actinotignum isolates misidentified by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. Microbiol Spectr 2026; 0:e0219025. 🇨🇭

Nomenclatural status: not validly published

Taxonomic status: preferred name (not correct name)

Parent taxon: Actinotignum Yassin et al. 2015

Assigned by: Winterflood DM, Segui-Crespi G, Peeters C, Lang C, Ivan B, Keller PM, Schlaepfer P, Moore ERB, Vandamme P, Goldenberger D. Whole-genome sequence analyses reveal cryptic species-level diversity among clinical Actinotignum isolates misidentified by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. Microbiol Spectr 2026; 0:e0219025. 🇨🇭

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Record number: 71749