Updates to the recently introduced family Lacipirellulaceae in the phylum Planctomycetes: isolation of strains belonging to the novel genera Aeoliella, Botrimarina, Pirellulimonas and Pseudobythopirellula and the novel species Bythopirellula polymerisocia and Posidoniimonas corsicana.

Eight novel strains of the phylum Planctomycetes were isolated from different aquatic habitats. Among these habitats were the hydrothermal vent system close to Panarea Island, a public beach at Mallorca Island, the shore of Costa Brava (Spain), and three sites with brackish water in the Baltic Sea. The genome sizes of the novel strains range from 4.33 to 6.29 Mb with DNA G+C contents between 52.8 and 66.7%. All strains are mesophilic (T 24-30 °C) and display generation times between 17 and 94 h. All eight isolates constitute novel species of either already described or novel genera within the family Lacipirellulaceae. Two of the novel species, Posidoniimonas polymericola (type strain Pla123a = DSM 103020 = LMG 29466) and Bythopirellula polymerisocia (type strain Pla144 = DSM 104841 = VKM B-3442), belong to established genera, while the other strains represent the novel genera Aeoliella gen. nov., Botrimarina gen. nov., Pirellulimonas gen. nov. and Pseudobythopirellula gen. nov. Based on our polyphasic analysis, we propose the species Aeoliella mucimassa sp. nov. (type strain Pan181 = DSM 29370 = LMG 31346 = CECT 9840 = VKM B-3426), Botrimarina colliarenosi sp. nov. (type strain Pla108 = DSM 103355 = LMG 29803), Botrimarina hoheduenensis sp. nov. (type strain Pla111 = DSM 103485 = STH00945, Jena Microbial Resource Collection JMRC), Botrimarina mediterranea sp. nov. (type strain Spa11 = DSM 100745 = LMG 31350 = CECT 9852 = VKM B-3431), Pirellulimonas nuda sp. nov. (type strain Pla175 = DSM 109594 = CECT 9871 = VKM B-3448) and Pseudobythopirellula maris sp. nov. (type strain Mal64 = DSM 100832 = LMG 29020).