jannaschia jannaschia in taxonomy, jannaschia is a genus of the rhodobacteraceae. jannaschia scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: rhodobacterales family: rhodobacteraceae genus: jannaschiawagner-dobler et al. 2003 species j. aquimarina park and yoon 2012 j. confluentis park et al. 2018 j. cystaugens adachi et al. 2004 j. donghaensis yoon et al. 2007 j. faecimaris jung and yoon 2014 j. formosa zhang et al. 2019 j. helgolandensis wagner-döbler et al. 2003 j. marina chen et al. 2021 j. pohangensis kim et al. 2008 j. rubra macián et al. 2005 j. seohaensis yoon et al. 2010 j. seosinensis choi et al. 2006 synonyms "thalassobacter" nogami et al. 1997 thalassobacter macián et al. 2005 name the genus is named for holger w. jannasch, a german microbiologist described as "one of the pioneers of marine microbiology".