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Halogeometricum borinquense gen. nov., sp. nov., a novel halophilic archaeon from Puerto Rico

¹Biology Department, University of Puerto Rico, Mayaguez Campus, Mayaguez, PR 00680-5000, Puerto Rico
²Department of Biology, West Chester University, West Chester, PA 19383, USA
³Division of Microbial and Molecular Ecology, and the Moshe Shilo Minerva Center for Marine Biogeochemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
⁴Department of Membrane and Ultrastructure Research, The Hebrew University - Hadassah Medical School, POB 12272, Jerusalem, 91110, Israel
⁵Department of Chemistry, University of Puerto Rico, Mayaguez Campus, Mayaguez, PR 00680-5000, Puerto Rico

⁶Tel/Fax: +1 787 265 5453. e-mail: sonw{at}caribe.net

ABSTRACT

A novel extremely halophilic archaeon was isolated from the solar salterns of Cabo Rojo, Puerto Rico. The organism is very pleomorphic motile and requires at least 8% (w/v) NaCI to grow. Polar lipid composition revealed the presence of a novel non-sulfate-containing glycolipid and the absence of the glycerol diether analogue of phosphatidylglycerosulfate. The G+C content of the DNA is 59 mol%. On the basis of 16S rRNA sequence data, the new isolate cannot be classified in one of the recognized genera, but occupies a position that is distantly related to the genus Haloferax. All these features justify the creation of a new genus and a new species for the family Halobacteriaceae, order Halobacteriales. The name Halogeometricum borinquense gen. nov., sp. nov. is proposed. The type strain is ATCC 700274^T.

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