Name: "Clostridioides cryptodifficilis" Aguilar et al. 2026

Category: Species

Proposed as: sp. nov.

Etymology: cryp.to.dif.fi’ci.lis. Gr. masc. adj. kryptos, hidden, secret; L. masc./fem. adj. difficilis, the specific epithet of C. difficile; N.L. masc./fem. adj. cryptodifficilis, the hidden difficile, referring to its cryptic phylogenetic nature

Gender: neuter

Nomenclatural type: DSM 113163; JCM 38291; LIBA-2809

16S rRNA gene: CP197004 Analyse FASTA

Original publication: Aguilar D, Riedel T, Maass S, Trautwein-Schult A, Neumann-Schaal M, Kirstein S, Schober I, Bunk B, Acuna-Amador L, Lopez-Urena D, et al. Beyond difficile: three novel toxin B-producing Clostridioides species from human patients with diarrhea. Emerg Microbes Infect 2026; 0:2671473. 🇩🇪

Nomenclatural status: not validly published

Taxonomic status: preferred name (not correct name)

Parent taxon: Clostridioides Lawson et al. 2016

Assigned by: Aguilar D, Riedel T, Maass S, Trautwein-Schult A, Neumann-Schaal M, Kirstein S, Schober I, Bunk B, Acuna-Amador L, Lopez-Urena D, et al. Beyond difficile: three novel toxin B-producing Clostridioides species from human patients with diarrhea. Emerg Microbes Infect 2026; 0:2671473. 🇩🇪

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Record number: 71894