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Fontimonas thermophila gen. nov., sp nov., a moderately thermophilic bacterium isolated from a freshwater hot spring, and proposal of Solimonadaceae fam. nov to replace Sinobacteraceae Zhou et al. 2008

Journal article
Authors N. A. Losey
B. S. Stevenson
S. Verbarg
S. Rudd
Edward R.B. Moore
P. A. Lawson
Published in International Journal of Systematic and Evolutionary Microbiology
Volume 63
Pages 254-259
ISSN 1466-5026
Publication year 2013
Published at Institute of Biomedicine, Department of Infectious Medicine
Pages 254-259
Language en
Keywords acid, hydrocarbon, patterns, culture
Subject categories Microbiology in the medical area


A novel bacterial strain designated HA-01(T) was isolated from a freshwater terrestrial hot spring located at Hot Springs National Park, Arkansas, USA. Cells were Gram-negative-staining, rod-shaped, aerobic, chemo-organotrophic, oxidase- and catalase-positive, non-spore-forming and motile by means of a single polar flagellum. Growth occurred at 37-60 degrees C, with an optimum between 45 and 50 degrees C, and at pH 6.5-8.5, with an optimum between pH 6.5 and 7.0. Phylogenetic analysis based on 16S rRNA gene sequences indicated that the closest relatives of strain HA-01T were Solimonas aquatica NAA-16(T) (93.8%), Solimonas flava CW-KD 4(T) (94.1 %), Solimonas soli DCY12(T) (93.1 %), Solimonas variicoloris MN28(T) (94.0 %), Nevskia ramosa Soe1(T) (91.2 WO) and Hydrocarboniphaga effusa AP103(T) (91.1 %). Major fatty acids consisted of C-16:0, iSO-C-16:0, C-16:1 omega 5c and summed feature 8 (C-18 : 1 omega 9C, C-18:1 omega 7c and C-18:1 omega 6c). Polar lipids consisted of diphosphatidylglycerol, phosphatidylglycerol and phosphatidylethanolamine, and the major isoprenoid quinone was Q-8. The DNA G+C content was 64.4 mol%. Based on phylogenetic, phenotypic and chemotaxonomic evidence, it is proposed that strain HA-01T represents a novel species in a new genus for which the name Fontimonas thermophila gen. nov., sp. nov. is proposed. The type strain of the type species is HA-01T (=DSM 23609(T)=CCUG 59713(T)). A new family, Solimonadaceae fam. nov., is also proposed to replace Sinobacteriaceae Zhou et al. 2008.

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