Name: "Pseudactinobacillus ducreyi" (Neveu-Lemaire 1921) Segui et al. 2026
Basonym: "Coccobacillus ducreyi" Neveu-Lemaire 1921
Etymology: du.crey’i. N.L. gen. masc. n. ducreyi, of Ducrey, named after Ducrey, the bacteriologist who first isolated this organism Pseudactinobacillus
Pronunciation (Latin), gender: … du-KREY-i, masculine
Nomenclatural type: ATCC 33940; CCUG 4438; CIP 54.2; DSM 8925; NCTC 10945
See detailed strain information at
Conduct genome-based taxonomy at
16S rRNA gene:
M63900
Analyse
FASTA
Original publication:
Seguí G, Piñeiro-Iglesias B, Salvà-Serra F, Karlsson R, Moore ERB. Resolving taxonomic uncertainties in the genus Haemophilus: a genomics-based approach for the reclassification of species within genera of the family Pasteurellaceae and proposal of four novel genera and one novel species. Frontiers in Microbiology 2026; 17:0. 
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Nomenclatural status: not validly published
Taxonomic status: synonym (and no standing)
Correct name: Haemophilus ducreyi (Neveu-Lemaire 1921) Bergey et al. 1923 (Approved Lists 1980)
| Name | Kind |
|---|---|
| "Coccobacillus ducreyi" Neveu-Lemaire 1921 | homotypic synonym, not validly published, basonym of name in Approved Lists |
| Haemophilus ducreyi (Neveu-Lemaire 1921) Bergey et al. 1923 (Approved Lists 1980) | homotypic synonym, validly published under the ICNP |
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Parent taxon: "Pseudactinobacillus" Segui et al. 2026
Assigned by:
Seguí G, Piñeiro-Iglesias B, Salvà-Serra F, Karlsson R, Moore ERB. Resolving taxonomic uncertainties in the genus Haemophilus: a genomics-based approach for the reclassification of species within genera of the family Pasteurellaceae and proposal of four novel genera and one novel species. Frontiers in Microbiology 2026; 17:0. 🇸🇪
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