Miltoncostaea

Abstract

Abstract Mil.ton.cos.tae'a. N.L. fem. n. Miltoncostaea , the name is dedicated to the Portuguese microbiologist Milton S. da Costa, who significantly contributed to the study of the deep actinobacterial branching phylogenetic lineage of order Gaiellales . Actinomycetota / Thermoleophilia / Miltoncostaeales / Miltoncostaeaceae / Miltoncostaea The genus Miltoncostaea comprises two validly named species, Miltoncostaea marina and Miltoncostaea oceani . These organisms form short rod‐shaped cells. The type species of the genus, M . marina , is motile; species M . oceani is nonmotile. Cells stain Gram‐negative, and endospores are not observed. Colonies are nonpigmented. The species of the genus Miltoncostaea are strictly aerobic, mesophilic, and slightly halophilic. Possess cytochrome c oxidase and are catalase positive. The organisms are chemoorganotrophic. Carbohydrates and polyols are used as carbon and energy sources; amino acids are used as nitrogen sources. The peptidoglycan contains meso ‐diaminopimelic acid ( meso ‐Dpm) as diagnostic diamino acid and is of type A1γ'. The sole respiratory lipoquinone of this genus is menaquinone 7 (MK‐7). The polar lipid profile comprises phosphatidylglycerol (PG), unidentified phospholipids (PLs), and unidentified phosphoglycolipids (PGLs). Fatty acids are primarily straight‐chain saturated; branched fatty acids are also present. Isolated from deep‐sea sediments. DNA G + C content (mol%) : 74.8–76.1 (genome). Type species : Miltoncostaea marina Li et al. 2021, VL202.