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Gillisia myxillae sp. nov., a novel member of the family Flavobacteriaceae, isolated from the marine sponge Myxilla incrustans

¹ Coastal Marine Laboratory/Department of Biology, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, People's Republic of China
² Division of Environmental Science and Engineering, The National University of Singapore, Singapore
³ Department of Biology, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, People's Republic of China

Correspondence
Pei-Yuan Qian
boqianpy{at}ust.hk

A yellow-pigmented, Gram-negative, rod-shaped, strictly aerobic bacterium (strain UST050418-085^T) was isolated from the surface of a marine sponge, Myxilla incrustans, at Friday Harbor, WA, USA. The DNA G+C content of this strain was 34.6 mol%. The predominant fatty acids were i15 : 0, a15 : 0, i15 : 1, i16 : 0, i17 : 0 3-OH, 17 : 0 2-OH and summed feature 3, comprising i15 : 0 2-OH and/or 16 : 17c (altogether representing 69.0 % of the total fatty acids). MK-6 was the only respiratory quinone detected. Phylogenetic analysis based on 16S rRNA gene sequences indicated that the closest relatives of UST050418-085^T were members of the genus Gillisia, with sequence similarities of 93.2–96.6 %. Strain UST050418-085^T differed from its closest relatives by 11 to 18 phenotypic traits. Molecular evidence and phenotypic characteristics suggest that strain UST050418-085^T represents a novel species within the genus Gillisia. The name Gillisia myxillae sp. nov. is proposed, with UST050418-085^T (=JCM 13546^T=NRRL B-41416^T) as the type strain.

A scanning electron micrograph of a cell of strain UST050418-085^T is available as supplementary material in IJSEM Online.

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