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Pseudidiomarina taiwanensis gen. nov., sp. nov., a marine bacterium isolated from shallow coastal water of An-Ping Harbour, Taiwan, and emended description of the family Idiomarinaceae

¹ Center for General Education, Leader University, No. 188, Sec. 5, An-Chung Rd, Tainan, Taiwan
² Institute of Oceanography, National Taiwan University, PO Box 23-13, Taipei, Taiwan

Correspondence
Wung Yang Shieh
winyang{at}ntu.edu.tw

Two strains of heterotrophic, aerobic, marine bacteria, designated strains PIT1^T and PIT2, were isolated from sea-water samples collected at the shallow coastal region of An-Ping Harbour, Tainan, Taiwan. Both strains were Gram-negative. Cells grown in broth cultures were straight rods that were non-motile, lacking flagella. Both strains required NaCl for growth and exhibited optimal growth at 30–35 °C, 1–4 % NaCl and pH 8. They grew aerobically and were incapable of anaerobic growth by fermentation of glucose or other carbohydrates. Cellular fatty acids were predominantly iso-branched, with C_{15 : 0} iso and C_{17 : 0} iso representing the most abundant components. The DNA G+C contents of strains PIT1^T and PIT2 were 49·3 and 48·6 mol%, respectively. Phylogeny based on 16S rRNA gene sequences, together with data from phenotypic and chemotaxonomic characterization, revealed that the two isolates could be assigned to a novel genus in the family Idiomarinaceae, for which the name Pseudidiomarina gen. nov. is proposed. Pseudidiomarina taiwanensis sp. nov. is the type species of the novel genus (type strain PIT1^T=BCRC 17465^T=JCM 13360^T).

Published online ahead of print on 16 December 2005 as DOI 10.1099/ijs.0.64048-0.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain PIT^T is DQ118948.

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