Genus Xylella
Warning: In the List of Prokaryotic names with Standing in Nomenclature, an arrow (→) only indicates the sequence of valid publication of names and does not mean that the last name in the sequence must be used (see: Introduction).
Number of species, including synonyms, cited in this file: 2
Number of subspecies, including synonyms, cited in this file: 2
Classification (Warning: see also the file "Classification of prokaryotes: Introduction").
For a detailed description of this taxon see Bergey’s Manual of Systematics of Archaea and Bacteria (BMSAB).
Xylella Wells et al. 1987, gen. nov.
Type species: ¤ Xylella fastidiosa Wells et al. 1987.
Etymology: Gr. n. xulon, piece of wood, log, beam; L. dim. fem. ending -ella; N.L. fem. n. Xylella, a small piece of wood, a small log.
Valid publication: WELLS (J.M.), RAJU (B.C.), HUNG (H.Y.), WEISBURG (W.G.), MANDELCO-PAUL (L.) and BRENNER (D.J.): Xylella fastidiosa gen. nov., sp. nov.: gram-negative, xylem-limited, fastidious plant bacteria related to Xanthomonas spp. Int. J. Syst. Bacteriol., 1987, 37, 136-143.
Original article in IJSEM Online
Xylella fastidiosa Wells et al. 1987, sp. nov. (Type species of the genus.)
Type strain: (see also Global Catalogue of Microorganisms) PCE-RR = ATCC 35879= DSM 10026 = ICPB 50025 = ICMP 15197 = LMG 17159.
Sequence accession no. (16S rRNA gene) for the type strain: AF192343.
Etymology: L. fem. adj. fastidiosa, fastidious; referring to the nutritional fastidiousness of the organism, particularly on primary isolation.
Valid publication: WELLS (J.M.), RAJU (B.C.), HUNG (H.Y.), WEISBURG (W.G.), MANDELCO-PAUL (L.) and BRENNER (D.J.): Xylella fastidiosa gen. nov., sp. nov.: gram-negative, xylem-limited, fastidious plant bacteria related to Xanthomonas spp. Int. J. Syst. Bacteriol., 1987, 37, 136-143.
Original article in IJSEM Online
Note: Subsequently, this species has been divided into subspecies (see: below).
Xylella fastidiosa subsp. fastidiosa (Wells et al. 1987) Schaad et al. 2009, subsp. nov.
Type strain: (see also Global Catalogue of Microorganisms) PCE-RR = ATCC 35879= DSM 10026 = ICPB 50025 = ICMP 15197 = LMG 17159.
Sequence accession no. (16S rRNA gene) for the type strain: AF192343.
Etymology: L. fem. adj. fastidiosa, fastidious; referring to the nutritional fastidiousness of the organism, particularly on primary isolation.
Valid publication: Validation List no. 127. Int. J. Syst. Evol. Microbiol., 2009, 59, 923-925.
Effective publication: 1 SCHAAD (N.W.), POSTNIKOVA (E.), LACY (G.), FATMI (M.) and CHANG (C.J.): Xylella fastidiosa subspecies: X. fastidiosa subsp piercei, subsp. nov., X. fastidiosa subsp. multiplex subsp. nov., and X. fastidiosa subsp. pauca subsp. nov. Syst. Appl. Microbiol., 2004, 27, 290-300. 2 Erratum. The title should read as follows: Xylella fastidiosa subspecies: X. fastidiosa subsp. fastidiosa, subsp. nov., X. fastidiosa subsp. multiplex subsp. nov., and X. fastidiosa subsp. pauca subsp. nov. Syst. Appl. Microbiol., 2004, 27, 763.
Validation List no. 127 in IJSEM Online - Effective publication Online - Erratum Online
Notes:
1 The original authorship, Wells et al. 1987, was corrected according to the new Rule 40d.
Reference: GARRITY (G.M.), LABEDA (D.P.) and OREN (A.): Judicial Commission of the International Committee on Systematics of Prokaryotes. XIIth International (IUMS) Congress of Bacteriology and Applied Microbiology. Minutes of the meetings, 3, 4 and 6 August 2008, Istanbul, Turkey. Int. J. Syst. Evol. Microbiol., 2011, 61, 2775-2780.
Original article in IJSEM Online
2 Schaad et al. 2004 (Syst. Appl. Microbiol., 2004, 27, 290-300) proposed the subspecific epithet piercei. According to Rule 13d, "a subspecies that includes the type of the species must bear the same epithet as the species". Subsequently, the correct subspecific epithet (fastidiosa) was provided by the way of an erratum (Syst. Appl. Microbiol., 2004, 27, 763).
Reference: LISTS EDITOR, IJSEM: Validation List no. 127 (footnote ***). Int. J. Syst. Evol. Microbiol., 2009, 59, 923-925.
Validation List no. 127 in IJSEM Online - Erratum Online
3 The subspecies Xylella fastidiosa subsp. fastidiosa (Wells et al. 1987) Schaad et al. 2009 is automatically created by the valid publication of ¤ Xylella fastidiosa subsp. multiplex Schaad et al. 2009 [Rule 40d (formerly Rule 46)].
Xylella fastidiosa subsp. multiplex Schaad et al. 2009, subsp. nov.
Type strain: (see also Global Catalogue of Microorganisms) PL.788 = ATCC 35871= ICPB 50039 = ICMP 15199.
Sequence accession no. (16S rRNA gene) for the type strain: AF203388.
Etymology: L. fem. adj. multiplex, manifold; named to recognize the large number of host plants in which the bacterium causes disease
Valid publication: Validation List no. 127. Int. J. Syst. Evol. Microbiol., 2009, 59, 923-925.
Effective publication: 1 SCHAAD (N.W.), POSTNIKOVA (E.), LACY (G.), FATMI (M.) and CHANG (C.J.): Xylella fastidiosa subspecies: X. fastidiosa subsp piercei, subsp. nov., X. fastidiosa subsp. multiplex subsp. nov., and X. fastidiosa subsp. pauca subsp. nov. Syst. Appl. Microbiol., 2004, 27, 290-300. 2 Erratum. The title should read as follows: Xylella fastidiosa subspecies: X. fastidiosa subsp. fastidiosa, subsp. nov., X. fastidiosa subsp. multiplex subsp. nov., and X. fastidiosa subsp. pauca subsp. nov. Syst. Appl. Microbiol., 2004, 27, 763.
Validation List no. 127 in IJSEM Online - Effective publication Online - Erratum Online
Note: In Validation List 127, Xylella fastidiosa subsp. multiplex Schaad et al. 2009 is erroneously cited as Xylella fastidiosa subsp. multiplex Schaad et al. 2004.
Reference: Erratum. Int. J. Syst. Evol. Microbiol., 2009, 59, 1851.
Erratum in IJSEM Online
Xylella taiwanensis Su et al. 2016, sp. nov.
Type strain: (see also Global Catalogue of Microorganisms) PLS229=BCRC 80915=JCM 31187.
Sequence accession no. (whole genome shotgun sequencing project) for the type strain: NZ_JDSQ00000000.
Whole-genome sequence accession no. for the type strain: NZ_JDSQ00000000.
Etymology: N. L. fem. adj. taiwanensis, pertaining to Taiwan, where the type strain was isolated.
Source: Plant pathogen.
Valid publication: SU, C. C., DENG, W. L., JAN, F. J., CHANG, C. J., HUANG, H., SHIH, H. T. and CHEN, J. 2016. Xylella taiwanensis sp. nov., causing pear leaf scorch disease. Int. J. Syst. Evol. Microbiol., 66, 4766-4771.
Original article in IJSEM Online