Reclassification of Arthrobacter sanguinis (Mages et al. 2009) as Haematomicrobium sanguinis gen. nov., comb. nov

Due to its separate position within the genus Arthrobacter in many published phylogenetic trees and its incomplete chemotaxonomic characterization, the type strain of Arthrobacter sanguinis was subjected to analysis of its chemotaxonomic traits including quinone system, polar lipid profile, peptidoglycan structure and fatty acid profile. The fatty acid profile consisted of the major compounds (>10 %) iso-C15 : 0, anteiso-C15 : 0 and anteiso-C17 : 0. It showed a quinone system with the predominating menaquinone MK-9(H2). Both, fatty acid profile and quinone system are in line with the description of the genus Arthrobacter. The peptidoglycan type was l-Lys-l-Ala-Gly (A11.50) which is unique within the genus Arthrobacter sensu lato and also among species of the genus Arthrobacter recently reclassified in the genera Sinomonas, Paenarthrobacter and Pseudarthrobacter. The polar lipid profile was very complex and unique among the group of taxa in containing relatively high proportions of several unidentified lipids. In conclusion from the phylogenetic position and chemotaxonomic distinguishability from related taxa, the reclassification of Arthrobacter sanguinis in a new genus and species, Haematomicrobium sanguinis gen. nov., comb. nov., is proposed. The type strain of the type species is 741T (=CCUG 46407T=DSM 21259T).