Name: Xanthomonas maltophilia (Hugh 1981 ex Hugh and Ryschenkow 1961) Swings et al. 1983

Category: Species

Proposed as: comb. nov.

Basonym: Pseudomonas maltophilia (ex Hugh and Ryschenkow 1961) Hugh 1981

Etymology: N.L. neut. n. maltum, malt; Gr. fem. n. philia, friendship; N.L. fem. n. maltophilia, intended to mean friend of malt

Gender: feminine

Type strain: ATCC 13637; BCRC 10737; CCM 1640; CCRC 10737; CCUG 559 B; CCUG 5866; CFBP 3035; CGMCC 1.1788; CIP 60.77; DSM 50170; Hugh 810-2; IAM 12423; ICMP 17033; IFO 14161; IMET 10402; JCM 1975; LMG 958; NBIMCC 8895; NBRC 14161; NCAIM B.01119; NCCB 68018; NCIB 9203; NCIMB 9203; NCPPB 1974; NCTC 10257; NRC 729; NRRL B-2756; RH 1168; Stanier 67; VKM B-591

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB294553 Analyse FASTA

Valid publication: Swings J, De Vos P, Van Den Mooter M, De Ley J. Transfer of Pseudomonas maltophilia Hugh 1981 to the genus Xanthomonas as Xanthomonas maltophilia (Hugh 1981) comb. nov. Int. J. Syst. Bacteriol. 1983; 33:409-413.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym

Correct name: Stenotrophomonas maltophilia (Hugh 1981 ex Hugh and Ryschenkow 1961) Palleroni and Bradbury 1993

Risk group: 2

• Synonyms:

  • Name	Kind
    Stenotrophomonas africana Drancourt et al. 1997	heterotypic synonym, validly published under the ICNP
    Pseudomonas maltophilia (ex Hugh and Ryschenkow 1961) Hugh 1981	homotypic synonym, validly published under the ICNP
    Stenotrophomonas maltophilia (Hugh 1981 ex Hugh and Ryschenkow 1961) Palleroni and Bradbury 1993	homotypic synonym, validly published under the ICNP

• Emendations:
  • van den Mooter and Swings 1990 Van den Mooter M, Swings J. Numerical analysis of 295 phenotypic features of 266 Xanthomonas strains and related strains and an improved taxonomy of the genus. Int J Syst Bacteriol 1990; 40:348-369.
    Notes:
    • 🫂 Emendation accompanied by 2 proposals regarding the synonymy of the species.

• Notes:
  • ⏰ According to Coenye et al. (2004), this species is an earlier heterotypic synonym of Stenotrophomonas africana Drancourt et al. 1997. Publication: Coenye T, Vanlaere E, Falsen E, Vandamme P. Stenotrophomonas africana Drancourt et al. 1997 is a later synonym of Stenotrophomonas maltophilia (Hugh 1981) Palleroni and Bradbury 1993. Int J Syst Evol Microbiol 2004; 54:1235-1237.
  • ⏰ According to Van den Mooter and Swings (1990), this species is an earlier heterotypic synonym of Pseudomonas betle (Ragunathan 1928) Savulescu 1947 (Approved Lists 1980) but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Van den Mooter M, Swings J. Numerical analysis of 295 phenotypic features of 266 Xanthomonas strains and related strains and an improved taxonomy of the genus. Int J Syst Bacteriol 1990; 40:348-369.
  • ⏰ According to Van den Mooter and Swings (1990), this species is an earlier heterotypic synonym of "Bacterium betle" Ragunathan 1928 but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Van den Mooter M, Swings J. Numerical analysis of 295 phenotypic features of 266 Xanthomonas strains and related strains and an improved taxonomy of the genus. Int J Syst Bacteriol 1990; 40:348-369.
  • ⏰ According to Van den Mooter and Swings (1990), this species is an earlier heterotypic synonym of Pseudomonas beteli corrig. (Ragunathan 1928) Savulescu 1947 (Approved Lists 1980) but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Van den Mooter M, Swings J. Numerical analysis of 295 phenotypic features of 266 Xanthomonas strains and related strains and an improved taxonomy of the genus. Int J Syst Bacteriol 1990; 40:348-369.
  • ⏰ According to Van den Mooter and Swings (1990), this species is an earlier heterotypic synonym of Pseudomonas hibiscicola Moniz 1963 (Approved Lists 1980) but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Van den Mooter M, Swings J. Numerical analysis of 295 phenotypic features of 266 Xanthomonas strains and related strains and an improved taxonomy of the genus. Int J Syst Bacteriol 1990; 40:348-369.
  • ❗ Xanthomonas maltophilia is the correct name instead if this species is regarded as a separate species (i.e., if its nomenclatural type is not assigned to another species whose name is validly published, legitimate and not rejected and has priority) within a separate genus Xanthomonas.
  • 😷 The risk group for Belgium has been imported on 2024-02-05. The full classification is: risk group = 2, note = "human and animal pathogen - biological class of risk animal: 2". — The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 2, note = "Animal classification RG: 2 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No - Containment level: Containment Level 2". — The risk group for Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 2. — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 2, note = "ht". — If in doubt, use the risk group given in the regulations for your country and, if these are not available, use the risk group given in the catalogue of the culture collection from which you have obtained or intend to obtain the strain.
  • 🎓 Name mentioned 369 times in PubMed until 2024-03-27.
  • 🧍 This name was subject to a Request for an Opinion. Publication: van Zyl E, Steyn PL. Reinterpretation of the taxonomic position of Xanthomonas maltophilia and taxonomic criteria in this genus. Request for an opinion. Int J Syst Bacteriol 1992; 42:193-198.

Parent taxon: Xanthomonas Dowson 1939 (Approved Lists 1980)

Assigned by: Swings J, De Vos P, Van Den Mooter M, De Ley J. Transfer of Pseudomonas maltophilia Hugh 1981 to the genus Xanthomonas as Xanthomonas maltophilia (Hugh 1981) comb. nov. Int. J. Syst. Bacteriol. 1983; 33:409-413.

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Record number: 783141