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A bacterial strain, designated RS.Sph.026T, was isolated from mucus of the coral Fungia granulosa collected from the northern Red Sea (Gulf of Eilat, Israel). The bacterium was found to be Gram-negative, non-motile, halotolerant and heterotrophic. Comparative 16S rRNA gene sequence analyses showed that strain RS.Sph.026T belonged to the order Rhizobiales, with the highest levels of 16S RNA gene sequence similarity with Rhodobium orientis (92 %). Strain RS.Sph.026T grew optimally at a salinity of 3–4 %, pH 7.5–8 and 25–30 °C. The major cellular fatty acids were cis-7-octadecenoic acid (C18 : 1 ω7с; 57.2 %) and C19 : 0 cyclo ω8с (15.5 %). The DNA G+C content of strain RS.Sph.026T was 67.1 mol%. On the basis of its phenotypic properties and phylogenetic distinctiveness, strain RS.Sph.026T represents a novel genus and species in the order Rhizobiales, for which the name Amorphus coralli gen. nov., sp. nov. is proposed. The type strain is RS.Sph.026T (=LMG 24307T=DSM 19760T).
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