peteryoungia aggregata peteryoungia aggregata peteryoungia aggregata is a gram-negative bacterium of the genus peteryoungia. peteryoungia aggregata scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: rhizobiaceae genus: peteryoungia species: p. aggregata binomial name peteryoungia aggregata(hirsch and müller 1986) kuzmanović et al. 2022 type strain atcc 43293dsm 111dsm 1111ifam 1003müller 161miller 161vkm b-2061 synonyms blastobacter aggregatus hirsch and müller 1986 rhizobium aggregatum (hirsch and müller 1986) kaur et al. 2011