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Neptuniibacter caesariensis gen. nov., sp. nov., a novel marine genome-sequenced gammaproteobacterium

¹ Colección Española de Cultivos Tipo (CECT), Universitat de València, Campus de Burjassot, 46100 València, Spain
² Departamento de Microbiología y Ecología, Universitat de València, Campus de Burjassot, 46100 València, Spain
³ Institut de Ciències del Mar-CMIMA (CSIC), Passeig Marítim de la Barceloneta 37-49, 08003 Barcelona, Catalunya, Spain
⁴ Departamento de Microbiología y Biología Celular, Facultad de Farmacia, Universidad de La Laguna, La Laguna, Tenerife, Spain
⁵ Instituto Cavanilles de Biodiversidad y Biología Evolutiva, Universitat de València, Campus de Burjassot, 46100 València, Spain
⁶ Marine Microbiology, Department of Biology and Environmental Sciences, University of Kalmar, SE-39182 Kalmar, Sweden

Correspondence
Jarone Pinhassi
jarone.pinhassi{at}hik.se

A Gram-negative, slightly halophilic, strictly aerobic, motile chemoorganotrophic bacterium, strain MED92^T, was isolated from a surface water sample from the eastern Mediterranean Sea. Phylogenetic analysis based on its 16S rRNA gene sequence, retrieved from the whole-genome sequence, demonstrated that this isolate is unique, showing <93 % sequence similarity to species of the families Oceanospirillaceae and Alteromonadaceae. The polar lipid profile of the novel strain consisted of phosphatidylethanolamine, phosphatidylglycerol, an unknown aminophospholipid and diphosphatidylglycerol. Major fatty acids are 16 : 17c/15 iso 2-OH (41.2 % relative amount), 18 : 17c (35.9 %), 16 : 0 (16.1 %), 10 : 0 3-OH (5.0 %) and 18 : 0 (1.0 %). Preferred carbon sources are organic acids and amino acids. The DNA G+C content is 46.6 mol%. Based on a phenotypic, chemotaxonomic and phylogenetic analyses, it is proposed that this marine bacterium represents a novel genus and species, for which the name Neptuniibacter caesariensis gen. nov., sp. nov. is proposed. The type strain is MED92^T (=CECT 7075^T=CCUG 52065^T).

Additional phylogenetic trees constructed using the maximum-parsimony and maximum-likelihood methods and scanning electron micrographs of cells of strain MED92^T are available as supplementary figures in IJSEM Online.

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