Strain JC669^T was isolated from a floating island of Loktak lake, Manipur, India and shares the highest 16S rRNA gene sequence identity with Aquisphaera giovannonii OJF2^T. The novel strain is aerobic, Gram negative, light pink-coloured, non-motile, NaCl intolerant and spherical to oval-shaped. It grows in the form of single cells or aggregates and possibly forms structures which appear like fruiting bodies. Strain JC669^T grows well up to pH 9.0.The isolate produces MK-6 as respiratory quinone, C_18:1ω9c, C_16:0 and C_18:0 as major fatty acids and phosphatidylcholine, an unidentified amino lipid, an unidentified choline lipid (UCL) and six additional unidentified lipids (UL1, 2, 3, 4, 5, 6) as polar lipids. Strain JC669^T has a large genome size of 10.04 Mb and the genomic G + C content was 68.5 mol%. The genome contained all genes essential for lycopene related carotenoid biosynthesis. The polyphasic analysis of its phylogenetic position, morphological, physiological and genomic features supports the classification of strain JC669^T as a novel species of the genus Aquisphaera, for which we propose the name Aquisphaera insulae sp. nov. Strain JC669^T (= KCTC 72672^T = NBRC 114306^T) is the type strain of the novel species.

菌株 JC669 ^T分离自印度曼尼普尔邦 Loktak 湖的一个浮岛，与Aquisphaera giovannonii OJF2 ^T具有最高的 16S rRNA 基因序列同一性。新菌株是需氧的、革兰氏阴性的、浅粉红色的、不能运动的、不耐受 NaCl 的并且呈球形至椭圆形。它以单细胞或聚集体的形式生长，并可能形成看起来像子实体的结构。菌株 JC669 ^T在 pH 9.0 时生长良好。分离物产生 MK-6 作为呼吸醌、C _18:1 ω9c、C _16:0和 C _18:0作为主要脂肪酸和磷脂酰胆碱、一种未鉴定的氨基脂质、一种未鉴定的胆碱脂质 (UCL) 和六种其他未鉴定的脂质 (UL1、2、3、4、5、6) 作为极性脂质。菌株 JC669 ^T的基因组大小为 10.04 Mb，基因组 G + C 含量为 68.5 mol%。该基因组包含番茄红素相关类胡萝卜素生物合成所必需的所有基因。其系统位置，形态，生理和基因组特征的多相分析支持应变JC669的分类^Ť作为属的一个新种Aquisphaera，为此我们建议名称Aquisphaera脑岛藻。十一月 菌株 JC669 ^T (= KCTC 72672 ^T  = NBRC 114306 ^T) 是新种的模式株。