- Volume 69, Issue 7, 2019
Volume 69, Issue 7, 2019
- New taxa
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- Eukaryotic Micro-Organisms
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Tremella saccharicola f.a., sp. nov., a novel tremellaceous yeast species isolated from tropical regions
More LessTen strains representing a single anamorphic novel yeast species were isolated from the external surface (DMKU-SP23 and DMKU-SP40) and tissue (DMKU-SE89, DMKU-SE99, DMKU-SE100 and DMKU-SE147) of sugarcane leaves in Thailand, and phylloplane (IMUFRJR 52034) and rhizoplane (IMUFRJ 52036 and 52037) of sugarcane and associated soil (IMUFRJ 52035) in Brazil. These strains showed zero to two nucleotide substitutions in the sequences of the D1/D2 region of the LSU rRNA gene and zero to three nucleotide substitutions in the internal transcribed spacer (ITS) region. Tremella globispora was the most closely related species, but with 1.7–2.1 % nucleotide substitutions in the D1/D2 region of the LSU rRNA gene, and 5.3–6.0 % nucleotide substitutions in the ITS region. Phylogenetic analysis based on the concatenated sequences of the ITS and the D1/D2 regions showed that these 10 strains represented a single species belonging to the genus Tremella (class Tremellomycetes, subphylum Agaricomycotina) that was distinct from related species. They therefore represented a novel species of the genus Tremella although the formation of basidia and basidiocarp were not observed. The name Tremella saccharicola f.a., sp. nov. is proposed. The type strain is DMKU-SP23T (=NBRC 109698T=BCC 61186T).
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- Evolution, Phylogeny and Biodiversity
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Whole genome sequences reveal the presence of 11 heterotypic synonyms in the genus Sphingobium and emended descriptions of Sphingobium indicum, Sphingobium fuliginis, Sphingobium xenophagum and Sphingobium cupriresistens
More LessPhylogenetic analysis based on 16S rRNA gene sequences of the genus Sphingobium showed the presence of four distinguishable clusters, in each of which the species shared almost the same evolutionary distance. They were Sphingobium indicum , Sphinogbium lucknowense, Sphinogbium chinhatense, Sphinogbium francense and Sphinogbium japonicum in cluster I, Sphinogbium barthaii and Sphinogbium fuliginis in cluster II, Sphinogbium hydrophobicum and Sphinogbium xenophagum in cluster III and Sphinogbium czechense and Sphinogbium cupriresistens in cluster IV. The 16S rRNA gene sequence similarities between the species in each cluster were all higher than 98 %. Genome-based average nucleotide identity (ANI) and digital DNA–DNA hybridization (dDDH) relatedness values between the species of each cluster were all higher than the threshold values of 95–96 % ANI and 70 % dDDH for species discrimination, respectively, suggesting that each cluster represents only one species of the genus Sphingobium . Due to priority of publication, S. lucknowense , S. chinhatense , S. francense and S. japonicum should be taken as later heterotypic synonyms of S. indicum , S. barthaii as a later heterotypic synonym of S. fuliginis , S. hydrophobicum as a later heterotypic synonym of S. xenophagum and S. czechense as a later heterotypic synonym of S. cupriresistens . Correspondingly, the descriptions of S. indicum , S. fuliginis , S. xenophagum and S. cupriresistens are also emended based on this study.
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An analysis of the term 'standing in nomenclature', as used in the International Code of Nomenclature of Prokaryotes
More LessThe term ‘standing in nomenclature’ is used in several instances in the International Code of Nomenclature of Prokaryotes, but the term is not defined. An analysis of the way the term has been used in the past and the context in which it is currently used indicates that it may be more appropriate to substitute the term with more suitable wording that is consistent with usage in other parts of the Code.
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- ICSP Matters
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International Committee on Systematics of Prokaryotes Subcommittee on the taxonomy of Mollicutes: Minutes of the closed meeting, 8 July 2018, Portsmouth, New Hampshire, USA
M. May and D. R. BrownThis report documents the International Committee on Systematics of Prokaryotes Subcommittee on the taxonomy of Mollicutes by recording the minutes of the meeting, held 8 July 2018, Portsmouth, New Hampshire, USA.
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International Committee on Systematics of Prokaryotes, Subcommittee on the taxonomy of Bifidobacterium, Lactobacillus and related organisms. Minutes of open and closed meetings, 19 July 2016, Dublin, Ireland
More LessThe meeting of International Committee on Systematics of Prokaryotes, Subcommittee on the taxonomy of Bifidobacterium , Lactobacillus and related organisms was held within the frame of the FoodMicro 2016 Congress in Dublin (FoodMicro 2016, 19–22 July 2016, Dublin, Ireland). The meeting comprised an open session with a workshop entitled ‘Research and networking taxonomy in food with an emphasis on LAB’ and a closed session on issues related to ICSP Subcommittee activities.
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Proposal for changes in the International Code of Nomenclature of Prokaryotes: granting priority to Candidatus names
More LessCurrently, the description of taxa designated Candidatus requires gene sequences and other taxonomically relevant available information in the absence of an isolated pure culture, and Candidatus names are provisional, i.e. without formal standing in nomenclature. If gene sequences are accepted as suitable type material for the description of prokaryotic species, many taxa designated Candidatus would fulfil all the requirements in the International Code of Nomenclature of Prokaryotes for priority. Here we propose that upon acceptance of sequence data as type material, all Candidatus names published before 1 January 2020 which are otherwise in accordance with the rules of the Code will have their priority based upon their date of publication in the International Journal of Systematic and Evolutionary Microbiology, either within a paper, a list of names of Candidatus taxa, or a Validation List, unless a synonymous name already exists based upon deposition of type cultures. We further propose that modifications of the superscript ‘T’ be used to identify the nomenclatural types. If the type material is a culture, the superscript ‘T’ will continue to be used. If the type material is a sequence, the superscript ‘Ts’ will be used. If the type material is some other form of description, the superscript ‘Td’ will be used.
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Volumes and issues
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Volume 74 (2024)
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Volume 73 (2023)
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Volume 72 (2022 - 2023)
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Volume 71 (2020 - 2021)
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Volume 70 (2020)
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Volume 69 (2019)
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Volume 68 (2018)
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Volume 67 (2017)
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Volume 66 (2016)
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Volume 65 (2015)
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Volume 64 (2014)
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Volume 63 (2013)
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Volume 62 (2012)
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Volume 61 (2011)
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Volume 60 (2010)
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Volume 59 (2009)
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Volume 58 (2008)
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Volume 57 (2007)
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Volume 56 (2006)
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Volume 55 (2005)
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Volume 54 (2004)
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Volume 53 (2003)
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Volume 52 (2002)
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Volume 51 (2001)
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Volume 50 (2000)
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Volume 49 (1999)
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Volume 48 (1998)
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Volume 47 (1997)
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Volume 46 (1996)
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Volume 45 (1995)
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Volume 44 (1994)
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Volume 43 (1993)
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Volume 42 (1992)
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Volume 41 (1991)
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Volume 40 (1990)
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Volume 39 (1989)
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Volume 38 (1988)
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Volume 37 (1987)
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Volume 36 (1986)
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Volume 35 (1985)
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Volume 34 (1984)
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Volume 33 (1983)
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Volume 32 (1982)
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Volume 31 (1981)
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Volume 30 (1980)
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Volume 29 (1979)
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Volume 28 (1978)
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Volume 27 (1977)
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Volume 26 (1976)
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Volume 25 (1975)
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Volume 24 (1974)
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Volume 23 (1973)
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Volume 22 (1972)
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Volume 21 (1971)
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Volume 20 (1970)
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Volume 19 (1969)
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Volume 18 (1968)
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Volume 17 (1967)
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Volume 16 (1966)
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Volume 15 (1965)
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Volume 14 (1964)
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Volume 13 (1963)
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Volume 12 (1962)
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Volume 11 (1961)
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Volume 10 (1960)
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Volume 9 (1959)
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Volume 8 (1958)
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Volume 7 (1957)
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Volume 6 (1956)
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Volume 5 (1955)
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Volume 4 (1954)
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Volume 3 (1953)
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Volume 2 (1952)
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Volume 1 (1951)