Methylophaga lonarensis sp. nov., a moderately haloalkaliphilic methylotroph isolated from the soda lake sediments of a meteorite impact crater

2012 ◽  
Vol 62 (Pt_7) ◽  
pp. 1613-1618 ◽  
Author(s):  
Chakkiath Paul Antony ◽  
Nina V. Doronina ◽  
Rich Boden ◽  
Yuri A. Trotsenko ◽  
Yogesh S. Shouche ◽  
...  
Keyword(s):  
Sequence Similarity ◽  
Carbon Assimilation ◽  
Soda Lake ◽  
Optimal Growth ◽  
Cellular Fatty Acid ◽  
Methylotrophic Bacterium ◽  
Vitamin B ◽  
Rrna Gene ◽  
Content Type ◽  
Link Type

A moderately haloalkaliphilic methylotrophic bacterium possessing the ribulose monophosphate pathway for carbon assimilation, designated MPLT, was isolated from Lonar Lake sediment microcosms that were oxidizing methane for two weeks. The isolate utilized methanol and was an aerobic, Gram-negative, asporogenous, motile, short rod that multiplied by binary fission. The isolate required NaHCO3 or NaCl for growth and, although not auxotrophic for vitamin B12, had enhanced growth with vitamin B12. Optimal growth occurred with 0.5–2 % (w/v) NaCl, at 28–30 °C and at pH 9.0–10.0. The cellular fatty acid profile consisted primarily of straight-chain saturated C16 : 0 and unsaturated C16 : 1ω7c and C18 : 1ω7c. The major ubiquinone was Q-8. The dominant phospholipids were phosphatidylethanolamine, phosphatidylglycerol and diphosphatidylglycerol. Cells accumulated ectoine as the main compatible solute. The DNA G+C content was 50.0 mol%. The isolate exhibited 94.0–95.4 % 16S rRNA gene sequence similarity with the type strains of methylotrophs belonging to the genus Methylophaga and 31 % DNA–DNA relatedness with the reference strain, Methylophaga alcalica VKM B-2251T. It is proposed that strain MPLT represents a novel species, Methylophaga lonarensis sp. nov. (type strain MPLT = VKM B-2684T = MCC 1002T).

Spirochaeta sphaeroplastigenens sp. nov., a halo-alkaliphilic, obligately anaerobic spirochaete isolated from soda lake Lonar

2013 ◽  
Vol 63 (Pt_6) ◽  
pp. 2223-2228 ◽  
Author(s):  
S. Vishnuvardhan Reddy ◽  
S. Aspana ◽  
D. L. Tushar ◽  
Ch. Sasikala ◽  
Ch. V. Ramana
Keyword(s):  
Dna Hybridization ◽  
Type Species ◽  
Sequence Similarity ◽  
Soda Lake ◽  
Cellular Fatty Acid ◽  
Rrna Gene ◽  
Content Type ◽  
Link Type ◽  
Dna Reassociation ◽  
Alkaline Conditions

Two helical-shaped bacteria (strains JC133T and JC143), which stain Gram-negative, were isolated from an alkaline soda lake, Lonar, India. Both strains were obligate anaerobes, mesophilic and required halo-alkaline conditions for growth. Both strains were resistant to rifampicin and kanamycin, but sensitive to gentamicin, tetracycline, ampicillin and chloramphenicol. Both strains had phosphatidylglycerol (PG), diphosphotidylglycerol (DPG), glycolipid (GL) and four unidentified lipids (L1–4) as the major polar lipids. C18 : 1ω7c was the predominant cellular fatty acid with significant proportions of C16 : 0, C18 : 1ω9c, C14 : 0, C18 : 0, C16 : 1ω5c, C18 : 1ω5c and C20 : 1ω9c. The DNA G+C contents of strain JC131T and JC143 were 58.2 and 58.5 mol%, respectively, and the two strains showed DNA reassociation >85 % (based on DNA–DNA hybridization). Based on the 16S rRNA gene sequence analysis, both strains were identified as belonging to the genus Spirochaeta with Spirochaeta alkalica Z-7491T (99.6 % sequence similarity), Spirochaeta americana ASpG1T (99 %) and other members of the genus Spirochaeta (<93 %) as their closest phylogenetic neighbours. However, strain JC133T and JC143 displayed less than 53.5 % binding (based on DNA–DNA hybridization) with S. alkalica Z-7491T and S. americana ASpG1T. On the basis of physiological, biochemical, chemotaxonomic and molecular properties, strains JC133T and JC143 can be differentiated from other members of the genus Spirochaeta and represent a novel species of the genus Spirochaeta , for which the name Spirochaeta sphaeroplastigenens sp. nov. is proposed. The type strain is JC133T ( = KCTC 15220T = NBRC 109056T).

Desulfotomaculum defluvii sp. nov., a sulfate-reducing bacterium isolated from the subsurface environment of a landfill

2013 ◽  
Vol 63 (Pt_6) ◽  
pp. 2290-2295 ◽  
Author(s):  
Srinivasan Krishnamurthi ◽  
Stefan Spring ◽  
Pinnaka Anil Kumar ◽  
Shanmugam Mayilraj ◽  
Hans-Peter Klenk ◽  
...  
Keyword(s):  
16S Rrna ◽  
16S Rrna Gene ◽  
Sequence Similarity ◽  
Optimal Growth ◽  
Cellular Fatty Acid ◽  
Rrna Gene ◽  
Strictly Anaerobic ◽  
Content Type ◽  
Sulfate Reducing ◽  
Link Type

A novel sulfate-reducing, strictly anaerobic and endospore-forming bacterium, designated strain A5LFS102T, was isolated from a subsurface landfill sample. The strain was characterized using a polyphasic approach. Optimal growth was observed at 37 °C and pH 7.5 with sulfate as an electron acceptor. Sulfite and thiosulfate were utilized as electron acceptors. The respiratory isoprenoid quinone was menaquinone MK-7. 16S rRNA gene sequence analysis assigned strain A5LFS102T to the genus Desulfotomaculum . Both 16S rRNA and dissimilatory sulfate reductase (dsr) genes were compared with those of representative members of the genus Desulfotomaculum . Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain A5LFS102T was closely related to Desulfotomaculum aeronauticum DSM 10349T (94.6 % sequence similarity). The G+C content of the DNA was 45.4 mol%. The total cellular fatty acid profile was dominated by C16 fatty acids. These phenotypic and genotypic data showed that strain A5LFS102T should be recognized as representative of a novel species of the genus Desulfotomaculum , for which the name Desulfotomaculum defluvii sp. nov. is proposed. The type strain is A5LFS102T ( = DSM 23699T = JCM 14036T = MTCC 7767T).

Cohaesibacter haloalkalitolerans sp. nov., isolated from a soda lake, and emended description of the genus Cohaesibacter

2013 ◽  
Vol 63 (Pt_11) ◽  
pp. 4271-4276 ◽  
Author(s):  
Vishnuvardhan Reddy Sultanpuram ◽  
Tushar Dilipchand Lodha ◽  
Venkata Ramana Chintalapati ◽  
Sasikala Chintalapati
Keyword(s):  
Fatty Acid ◽  
Type Species ◽  
Sequence Similarity ◽  
Soda Lake ◽  
Cellular Fatty Acid ◽  
Fatty Acid Analysis ◽  
Rrna Gene ◽  
Content Type ◽  
Link Type ◽  
Emended Description

Two novel Gram-stain-negative, motile, catalase-negative and oxidase-positive strains of bacteria (JC131T and JC112) were isolated from Lonar, a soda lake in India. Based on 16S rRNA gene sequence similarity studies, strains JC131T and JC112 belong to the family Cohaesibacteraceae of the class Alphaproteobacteria and were most closely related to Cohaesibacter marisflavi DQHS21T (98.0 %) and Cohaesibacter gelatinilyticus CL-GR15T (96.0 %). Polar lipids of strains JC131T and JC112 include phosphatidylglycerol, phosphatidylethnolamine, phosphatidylmonomethylethanolamine, diphosphatidylglycerol and two unidentified lipids (L1 and L2). Both strains have diplopterol, diploptene, an unidentified hopane (UH) and bacteriohopane derivatives (BHD1 and 2) as major hopanoids and an unidentified pigment (P1). The predominant isoprenoid quinone of both strains was ubiquinone-10 (Q10). Whole-cell fatty acid analysis of both strains revealed that C18 : 1ω7c was the predominant cellular fatty acid and significant proportions of C16 : 0, summed feature 3 (C16 : 1ω7c and/or iso-C15 : 0 2-OH), 11-methyl C18 : 1ω7c, C18 : 1ω9c, C18 : 0 and C20 : 1ω7c were also detected. The DNA G+C content of strains JC131T and JC112 was 54.6 and 53.8 mol%, respectively. The genome reassociation (based on DNA–DNA hybridization) of strains JC131T and JC112 with Cohaesibacter marisflavi NCCB 100300T ( = DQHS21T) was about 58 %, while between JC131T and JC112 it was about 87 %. On the basis of physiological, biochemical and chemotaxonomical properties, strains JC131T and JC112 are differentiated from the other two members of the genus Cohaesibacter . Strains JC131T and JC112 represent a novel species of the genus Cohaesibacter , for which the name Cohaesibacter haloalkalitolerans sp. nov. is proposed. The type strain is JC131T ( = KCTC 32038T = NBRC 109022T). An emended description of the genus Cohaesibacter is presented.

scholarly journals Hansschlegelia quercus sp. nov., a novel methylotrophic bacterium isolated from oak buds

2020 ◽  
Vol 70 (8) ◽  
pp. 4646-4652 ◽  
Author(s):  
Nadezhda V. Agafonova ◽  
Elena N. Kaparullina ◽  
Denis S. Grouzdev ◽  
Nina V. Doronina
Keyword(s):  
16S Rrna ◽  
16S Rrna Gene ◽  
Type Species ◽  
Sequence Similarity ◽  
Methylotrophic Bacterium ◽  
Rrna Gene ◽  
Methylotrophic Bacteria ◽  
Content Type ◽  
Link Type ◽  
A Genome

Novel aerobic, restricted facultatively methylotrophic bacteria were isolated from buds of English oak (Quercus robur L.; strain DubT) and northern red oak (Quercus rubra L.; strain KrD). The isolates were Gram-negative, asporogenous, motile short rods that multiplied by binary fisson. They utilized methanol, methylamine and a few polycarbon compounds as carbon and energy sources. Optimal growth occurred at 25 °C and pH 7.5. The dominant phospholipids were phosphatidylethanolamine, phosphatidylcholine, diphosphatidylglycerol and phoshatidylglycerol. The major cellular fatty acids of cells were C18 : 1 ω7c, 11-methyl C18 : 1 ω7c and C16 : 0. The major ubiquinone was Q-10. Analysis of 16S rRNA gene sequences showed that the strains were closely related to the members of the genus Hansschlegelia : Hansschlegelia zhihuaiae S113T(97.5–98.0 %), Hansschlegelia plantiphila S1T (97.4–97.6 %) and Hansschlegelia beijingensis PG04T(97.0–97.2 %). The 16S rRNA gene sequence similarity between strains DubT and KrD was 99.7 %, and the DNA–DNA hybridization (DDH) result between the strains was 85 %. The ANI and the DDH values between strain DubT and H. zhihuaiae S113T were 80.1 and 21.5  %, respectively. Genome sequencing of the strain DubT revealed a genome size of 3.57 Mbp and a G+C content of 67.0 mol%. Based on the results of the phenotypic, chemotaxonomic and genotypic analyses, it is proposed that the isolates be assigned to the genus Hansschlegelia as Hansschlegelia quercus sp. nov. with the type strain DubT (=VKM B-3284T=CCUG 73648T=JCM 33463T).

Bacillus gottheilii sp. nov., isolated from a pharmaceutical manufacturing site

2013 ◽  
Vol 63 (Pt_3) ◽  
pp. 867-872 ◽  
Author(s):  
Herbert Seiler ◽  
Mareike Wenning ◽  
Verena Schmidt ◽  
Siegfried Scherer
Keyword(s):  
Type Species ◽  
Sequence Similarity ◽  
Cellular Fatty Acid ◽  
Diaminopimelic Acid ◽  
Rrna Gene ◽  
Strictly Aerobic ◽  
Content Type ◽  
Link Type ◽  
Gram Staining ◽  
Acid Type

A novel Gram-staining-positive, rod-shaped, motile, strictly aerobic, endospore-forming bacterium, designated WCC 4585T, was isolated from a pharmaceutical production line. The organism grew optimally at 30 °C, at pH 8 and in the presence of 0.5 % (w/v) NaCl. Oval endospores were formed subterminally and terminally in swollen sporangia. The cell-wall diamino acid was meso-diaminopimelic acid (type A1γ) and the genomic DNA G+C content was 38.7 mol%. The major menaquinone was MK-7. The cellular fatty acid profile contained major amounts of iso-C15 : 0, anteiso-C15 : 0 and anteiso-C17 : 0, and the cellular phospholipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine and aminophospholipid. The isolate was most closely related to Bacillus oceanisediminis H2T, Bacillus infantis SMC 4352-1T, Bacillus firmus NCIMB 9366T, Bacillus circulans ATCC 4513T and Bacillus horneckiae DSM 23495T with which it shared less than 98.0 % 16S rRNA gene sequence similarity. DNA–DNA relatedness values between strain WCC 4585T and five type strains of related species were ≤27 % and sequence similarity values based on groEL sequences were ≤88.7 %. On the basis of the characteristics presented, strain WCC 4585T is proposed to represent a novel species, Bacillus gottheilii sp. nov. The type strain is WCC 4585T( = DSM 23668T = CCUG 59876T = LMG 25856T).

Tsuneonella suprasediminis sp. nov., isolated from the Pacific Ocean

2019 ◽  
Vol 71 (3) ◽  
Author(s):  
Yan Gao ◽  
Guangyu Li ◽  
Chen Fang ◽  
Zongze Shao ◽  
Yue-Hong Wu ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Type Species ◽  
Sequence Similarity ◽  
Cellular Fatty Acid ◽  
Rrna Gene ◽  
Overlying Water ◽  
Respiratory Quinone ◽  
Content Type ◽  
Link Type ◽  
Type Strains

A Gram-stain-negative, rod-shaped and aerobic bacterial strain, named Ery12T, was isolated from the overlying water of the Lau Basin in the Southwest Pacific Ocean. Strain Ery12T showed high 16S rRNA gene sequences similarity to Tsuneonella flava MS1-4T (99.9 %), T. mangrovi MCCC 1K03311T (98.1 %), Altererythrobacter ishigakiensis NBRC 107699T (97.3 %) and exhibited ≤97.0 % sequence similarity with other type strains of species with validly published names. Growth was observed in media with 0–10.0 % NaCl (optimum 0–1.0 %, w/v), pH 5.0–9.5 (optimum 6.0–7.0) and 10–42 °C (optimum 30–37 °C). The predominant respiratory quinone was ubiquinone 10 (Q-10). The major cellular fatty acid was summed feature 8 (C18 : 1  ω7c and/or C18 : 1  ω6c). The major polar lipids were sphingoglycolipid, phosphatidyglycerol, diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylcholine, three unidentified glycolipids, one unidentified aminoglycolipid and one unidentified lipid. The DNA G+C content was 60.8 %. The ANI and in silico DDH values between strain Ery12T and the type strains of its closely related species were 71.0- 91.8 % and 19.5- 44.6 %, respectively. According to the phenotypic, chemotaxonomic, phylogenetic and genomic data, strain Ery12T represents a novel species of the genus Tsuneonella , for which the name Tsuneonella suprasediminis is proposed. The type strain is Ery12T (=CGMCC 1.16500 T=MCCC 1A04421T=KCTC 62388T). We further propose to reclassify Altererythrobacter rhizovicinus and Altererythrobacter spongiae as Pelagerythrobacter rhizovicinus comb. nov. and Altericroceibacterium spongiae comb. nov., respectively.

Pseudomonas cyclaminis sp. nov., a pathogen causing bacterial bud blight of cyclamen in Japan

2019 ◽  
Vol 71 (3) ◽  
Author(s):  
Hiroyuki Sawada ◽  
Takashi Fujikawa ◽  
Shigeru Osada ◽  
Mamoru Satou
Keyword(s):  
Fatty Acids ◽  
Type Species ◽  
Sequence Similarity ◽  
Cellular Fatty Acid ◽  
Rrna Gene ◽  
Bacterial Strains ◽  
Gene Sequences ◽  
Content Type ◽  
Link Type ◽  
Total Fatty Acids

Five phytopathogenic bacterial strains, MAFF 301449T, MAFF 301450, MAFF 301451, MAFF 301452, and MAFF 301453, which were isolated from bud blight lesions of cyclamen (Cyclamen persicum Mill.) in Miyagi, Japan, were subjected to polyphasic taxonomic characterisation. The cells were Gram-reaction-negative, aerobic, non-spore-forming, motile with one to five polar flagella, and rod-shaped. Analysis of 16S rRNA gene sequences showed that they belong to the genus Pseudomonas , with Pseudomonas extremaustralis 14-3T (99.79 % sequence similarity), Pseudomonas trivialis DSM 14937T (99.79 %), Pseudomonas poae DSM 14936T (99.72 %), and Pseudomonas antarctica CMS 35T (99.72 %) as their relatives. The genomic DNA G+C content was 60.3 mol% and the major fatty acids (>5 % of the total fatty acids) were C16 : 0, summed feature 3 (C16 : 1 ω7c/C16 : 1 ω6c), summed feature 8 (C18 : 1 ω7c/C18 : 1 ω6c), and C17 : 0 cyclo. Phylogenetic analysis using the rpoD gene sequences and phylogenomic analyses based on the whole genome sequences demonstrated that the strains are members of the Pseudomonas fluorescens subgroup, but form a monophyletic and robust clade separated from their relatives. Average nucleotide identity and digital DNA–DNA hybridisation analyses with the closely related Pseudomonas species corroborated their novel species status. The strains were differentiated from their relatives by phenotypic characteristics, pathogenicity towards cyclamen, cellular fatty acid composition, and whole-cell MALDI-TOF mass spectrometry profiles. Based on the phenotypic, chemotaxonomic, and genotypic data obtained, we conclude that the strains represent a novel Pseudomonas species, for which we propose the name Pseudomonas cyclaminis sp. nov.; the type strain is MAFF 301449T (=ICMP 23720T).

Natranaerobaculum magadiense gen. nov., sp. nov., an anaerobic, alkalithermophilic bacterium from soda lake sediment

2013 ◽  
Vol 63 (Pt_12) ◽  
pp. 4456-4461 ◽  
Author(s):  
Daria G. Zavarzina ◽  
Tatyana N. Zhilina ◽  
Boris B. Kuznetsov ◽  
Tatyana V. Kolganova ◽  
Georgy A. Osipov ◽  
...  
Keyword(s):  
Yeast Extract ◽  
Sequence Similarity ◽  
Soda Lake ◽  
Rrna Gene ◽  
Donor Strain ◽  
Content Type ◽  
Link Type ◽  
Nacl Concentration ◽  
Novel Genus And Species ◽  
Ph Range

An obligately alkaliphilic, anaerobic, thermo- and halotolerant, spore-forming bacterium was isolated from sediments of soda lake Magadi (Kenya) and designated strain Z-1001T. Cells of strain Z-1001T were straight, Gram-positive rods, slowly motile. Strain Z-1001T was found to be an obligate anaerobe. It grew within a pH range from 7.5 to 10.7 with an optimum at 9.25–9.5 (at 40 °C), a temperature range from 20 to 57 °C with an optimum at 45–50 °C, and a NaCl concentration range from 0 to 1.55 M with an optimum at 1.2–1.4 M. Peptides, such as meat and yeast extracts, peptone and tryptone, were fermented by Z-1001T. Carbohydrates did not support growth. With yeast extract as an electron donor, strain Z-1001T reduced S 2 O 3 2 − , NO 3 − , AsO 4 3 − , Fe(III) citrate and anthraquinone-2,6-disulfonate (AQDS) as electron acceptors. The isolate was able to grow oligotrophically with a very small amount of yeast extract: 0.03 g l−1. The main fatty acids were C16 : 0, C16 : 1ω7c , C18 : 0 and C18 : 1ω9. The DNA G+C content of the isolate was 35.6 mol%. 16S rRNA gene sequence analysis showed that strain Z-1001T is a member of family Natranaerobiaceae , clustering with the type strain of Natranaerobius thermophilus (95.8–96.0 % sequence similarity). On the basis of physiological and phylogenetic data it is proposed that strain Z-1001T ( = DSM 24923T = VKM B-2666T) represents a novel genus and species, Natranaerobaculum magadiense gen. nov., sp. nov.

Aquimarina amphilecti sp. nov., isolated from the sponge Amphilectus fucorum

2014 ◽  
Vol 64 (Pt_2) ◽  
pp. 501-505 ◽  
Author(s):  
Jonathan Kennedy ◽  
Lekha Menon Margassery ◽  
Niall D. O’Leary ◽  
Fergal O’Gara ◽  
John Morrissey ◽  
...  
Keyword(s):  
Gene Sequence ◽  
Sequence Similarity ◽  
Optimal Growth ◽  
Rrna Gene ◽  
Respiratory Quinone ◽  
Content Type ◽  
Phenotypic Differences ◽  
Link Type ◽  
Gene Sequence Analysis ◽  
The Family

A Gram-stain-negative, rod-shaped, orange-coloured, catalase- and oxidase-positive, non-motile bacterium, designated strain 92VT, was isolated from the marine sponge Amphilectus fucorum, collected from Lough Hyne, County Cork, Ireland. 16S rRNA gene sequence analysis revealed that strain 92VT clustered with members of the family Flavobacteriaceae , the closest member being Aquimarina latercula NCIMB 1399T, with a gene sequence similarity of 97.5 %. Strain 92VT required seawater for growth with optimal growth occurring at 25 °C, at pH 6–7 and with 3 % (w/v) NaCl. MK-6 was the sole respiratory quinone present and the major fatty acids were iso-C17 : 0 3-OH, iso-C15 : 0, iso-C17 : 1ω9c and iso-C15 : 0 3-OH. The DNA G+C content was 36.1 mol%. Combined phenotypic differences and phylogenetic analysis indicate that strain 92VT represents a novel species of the genus Aquimarina , for which the name Aquimarina amphilecti sp. nov. is proposed. The type strain is 92VT ( = NCIMB 14723T = DSM 25232T).

scholarly journals Methanosarcina spelaei sp. nov., a methanogenic archaeon isolated from a floating biofilm of a subsurface sulphurous lake

2014 ◽  
Vol 64 (Pt_10) ◽  
pp. 3478-3484 ◽  
Author(s):  
Lars Ganzert ◽  
Janosch Schirmack ◽  
Mashal Alawi ◽  
Kai Mangelsdorf ◽  
Wolfgang Sand ◽  
...  
Keyword(s):  
Type Species ◽  
Dimethyl Sulfide ◽  
Membrane Lipids ◽  
Sequence Similarity ◽  
Optimal Growth ◽  
Methanosarcina Barkeri ◽  
Rrna Gene ◽  
Genotypic Differences ◽  
Content Type ◽  
Link Type

A novel methanogenic archaeon, strain MC-15T, was isolated from a floating biofilm on a sulphurous subsurface lake in Movile Cave (Mangalia, Romania). Cells were non-motile sarcina-like cocci with a diameter of 2–4 µm, occurring in aggregates. The strain was able to grow autotrophically on H2/CO2. Additionally, acetate, methanol, monomethylamine, dimethylamine and trimethylamine were utilized, but not formate or dimethyl sulfide. Trypticase peptone and yeast extract were not required for growth. Optimal growth was observed at 33 °C, pH 6.5 and a salt concentration of 0.05 M NaCl. The predominant membrane lipids of MC-15T were archaeol and hydroxyarchaeol phosphatidylethanolamine, phosphatidylglycerol, and phosphatidylinositol as well as hydroxyarchaeol phosphatidylserine and archaeol glycosaminyl phosphatidylinositol. The closely related species, Methanosarcina vacuolata and Methanosarcina horonobensis, had a similar composition of major membrane lipids to strain MC-15T. The 16S rRNA gene sequence of strain MC-15T was similar to those of Methanosarcina vacuolata DSM 1232T (sequence similarity 99.3 %), Methanosarcina horonobensis HB-1T (98.8 %), Methanosarcina barkeri DSM 800T (98.7 %) and Methanosarcina siciliae T4/MT (98.4 %). DNA–DNA hybridization revealed 43.3 % relatedness between strain MC-15T and Methanosarcina vacuolata DSM 1232T. The G+C content of the genomic DNA was 39.0 mol%. Based on physiological, phenotypic and genotypic differences, strain MC-15T represents a novel species of the genus Methanosarcina , for which the name Methanosarcina spelaei sp. nov. is proposed. The type strain is MC-15T ( = DSM 26047T = JCM 18469T).

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