, sp. nov., from an air conditioner condensate drain line.

A Gram-negative, rod-shaped and filamentous bacterium designated MD30B was isolated from a biofilm hanging in water flowing from an air conditioner condensate drain line in Honolulu, Hawai'i. Based on 1517 nucleotides of the strain's 16S rRNA gene, its nearest neighbours are T16R-86 (96.7 %), S-52 (96.6 %), ZY74 (96.6 %), JS13-10 (96.6 %) and Gsoil 052 (96.5 %). MD30B cells are non-motile, strictly aerobic, and catalase and oxidase positive. Growth occurs between 10 and 45 °C. Major fatty acids in whole cells of MD30B are 13-methyl tetradecanoic acid (34.1 %), -11-hexadecenoic acid (30.3 %), and 3-hydroxy, 15-methyl hexadecanoic acid (13.3 %). The quinone system contains predominantly menaquinone MK-7. The polar lipid profile contains the major lipids phosphatidylethanolamine, one unidentified lipid lacking a functional group, and two unidentified aminolipids. -Homospermidine is the major polyamine. The G+C content of the genome is 47.58 mol%. Based on phenotypic and genotypic differences between MD30B and extant species in the , we propose that MD30B represents a new species, for which the name sp. nov. is proposed to accommodate strain MD30B as the type strain (DSM 112477=NCTC 14606).