hanstruepera crassostreae hanstruepera crassostreae hanstruepera crassostreae is a gram-negative, aerobic, rod-shaped and non-motile bacterium from the genus of hanstruepera which has been isolated from a oyster from weihai. hanstruepera crassostreae scientific classification domain: bacteria phylum: bacteroidota class: flavobacteria order: flavobacteriales family: flavobacteriaceae genus: hanstruepera species: h. crassostreae binomial name hanstruepera crassostreaehe et al. 2018 type strain l53