A Gram-negative, aerobic, chemo-organotrophic, catalase- and oxidase-positive strain, designated AIMA4, was isolated from a chironomid (Diptera; Chironomidae) egg mass which was sampled from a waste stabilization pond in northern Israel. Phylogenetic analysis based on the 16S rRNA gene placed strain AIMA4 in the genus (class ). Strain AIMA4 shared 16S rRNA gene sequence similarity values of 96.9 % with JCM 9216 and <95.7 % with the type strains of other genera. Strain AIMA4 was found to be a non-motile coccobacillus or rod that did not grow under anaerobic conditions and did not produce acid from carbohydrates. Growth was observed at salinities from 0 to 2.5 % (w/v) NaCl, at pH values from 5.0 to 9.0 and at temperatures from 18 to 37 °C. The major fatty acids (>10 %) of strain AIMA4 were C 7, C and C 7. Phosphatidylethanolamine, phosphatidylglycerol and phosphatidylserine were the predominant components of the polar lipids. The major ubiquinone was Q-8. On the basis of phenotypic properties and phylogenetic distinctiveness, strain AIMA4 (=LMG 24400=DSM 19884) was classified in the genus as the type strain of a novel species for which the name sp. nov. is proposed.


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