Siculibacillus lacustris gen. Nov., sp. nov., a new rosette-forming bacterium isolated from a freshwater crater lake (lake St. Ana, Romania)

Tamás Felföldi, Zsuzsanna Márton, Attila Szabó, Anikó Mentes, Károly Bóka, Károly Márialigeti, István Máthé, Mihály Koncz, Peter Schumann, Erika Tóth

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A new aerobic alphaproteobacterium, strain SA-279T, was isolated from a water sample of a crater lake. The 16S rRNA gene sequence analysis revealed that strain SA-279T formed a distinct lineage within the family Ancalomicrobiaceae and shared the highest pairwise similarity values with Pinisolibacterravus E9T (96.4%) and Ancalomicrobiumadetum NBRC 102456T (94.2%). Cells of strain SA-279T were rod-shaped, motile, oxidase and catalase positive, and capable of forming rosettes. Its predominant fatty acids were C18: 1ω7c (69.0%) and C16: 1 ω 7c (22.7%), the major respiratory quinone was Q-10, and the main polar lipids were phosphatidylethanolamine, phosphatidylmonomethylethanolamine, phosphatidylcholine, phosphatidylglycerol, an unidentified aminophospholipid and an unidentified lipid. The G+C content of the genomic DNA of strain SA-279T was 69.2 mol%. On the basis of the phenotypic, chemotaxonomic and molecular data, strain SA-279T is considered to represent a new genus and species within the family Ancalomicrobiaceae, for which the name Siculibacillus lacustris gen. nov., sp. nov. is proposed. The type strain is SA-279T (=DSM 29840T=JCM 31761T).

Original languageEnglish
Pages (from-to)1731-1736
Number of pages6
JournalInternational journal of systematic and evolutionary microbiology
Issue number6
Publication statusPublished - Jun 2019



  • Alphaproteobacteria
  • Ancalomicrobiaceae
  • New genus
  • Rosette

ASJC Scopus subject areas

  • Microbiology
  • Ecology, Evolution, Behavior and Systematics

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