castellaniella castellaniella castellaniella is a genus of gram-negative, facultatively anaerobic, motile bacteria from the family of alcaligenaceae. castellaniella scientific classification domain: bacteria phylum: pseudomonadota class: betaproteobacteria order: burkholderiales family: alcaligenaceae genus: castellaniellakämpfer et al. 2006 type species castellaniella defragrans species c. caeni c. daejeonensis c. defragrans c. denitrificans c. fermenti c. ginsengisoli c. hirudinis