antarctobacter heliothermus antarctobacter heliothermus antarctobacter heliothermus is a gram-negative, aerobic, pointed and budding bacteria, the type species of its genus. its type strain is el-219t(= dsm 11445t). antarctobacter heliothermus scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: rhodobacterales family: rhodobacteraceae genus: antarctobacter species: a. heliothermus binomial name antarctobacter heliothermuslabrenz et al. 1998