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Int J Syst Evol Microbiol 59 (2009), 686-690; DOI  10.1099/ijs.0.000539-0
© 2009 International Union of Microbiological Societies

Thalassomonas actiniarum sp. nov. and Thalassomonas haliotis sp. nov., isolated from marine animals

Shoichi Hosoya, Kyoko Adachi and Hiroaki Kasai

Marine Biotechnology Institute, 3-75-1 Heita, Kamaishi, Iwate 026-0001, Japan

Correspondence
Shoichi Hosoya
hosoyas{at}hotmail.com

Two marine heterotrophic bacteria, A5K-61T and A5K-106T, were isolated from marine animals. 16S rRNA gene sequence analysis data showed that the isolates were affiliated with the genus Thalassomonas; highest 16S rRNA gene sequence similarity values were found with Thalassomonas viridans DSM 13754T (97.5 and 98.1 %, respectively). DNA–DNA hybridization values of strains A5K-61T and A5K-106T with T. viridans DSM 13754T (22.2–49.1 %) were clearly below 70 %, the generally accepted limit for species delineation. The isolates produced a brown diffusible pigment. The major respiratory quinone was Q-8 and the predominant cellular fatty acids were C16 : 1{omega}7c and C16 : 0. Based on DNA–DNA hybridization data, some biochemical characteristics and 16S rRNA gene sequence comparison, the isolates represent two novel species of the genus Thalassomonas, for which the names Thalassomonas actiniarum sp. nov. (type strain A5K-106T =MBIC08328T =NCIMB 14418T =NBRC 104231T) and Thalassomonas haliotis sp. nov. (type strain A5K-61T =MBIC08329T =NCIMB 14417T =NBRC 104232T) are proposed.

Abbreviations: ASW, artificial seawater; ML, maximum-likelihood; MP, maximum-parsimony; NJ, neighbour-joining

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of strains A5K-61T and A5K-106T are AB369381 and AB369380, respectively.

16S rRNA gene sequence-based trees constructed using the maximum-parsimony and maximum-likelihood methods and photographs of colonies of strains A5K-61T and A5K-106T are available as supplementary material with the online version of this paper.






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