nubsella nubsella nubsella is a genus from the family of sphingobacteriaceae with one known species (nubsella zeaxanthinifaciens). nubsella scientific classification domain: bacteria phylum: bacteroidota class: sphingobacteriia order: sphingobacteriales family: sphingobacteriaceae genus: nubsellaasker et al. 2008 species n. zeaxanthinifaciens