Zixibacteria

Zixibacteria is a bacterial phylum with candidate status, meaning it had no cultured representatives.^[1] It is a member of the FCB group^[2]

Zixibacteria
Scientific classification
Domain:	Bacteria
Kingdom:	Pseudomonadati
Phylum:	Zixibacteria Castelle et al. 2013

Zixibacteria was proposed as a bacterial phylum following the recovery of a genome from representative RBG-1.^[1] This genome was recovered using genome-resolved metagenomics from sediment samples of an aquifer adjacent to the Colorado River (CO, USA) and was suggestive of metabolically versatility, which is presumably requisite for life in a rapidly changing environment such as aquifer sediments^[1]

Since being proposed as a phylum in 2013, members of the Zixibacteria phylum have been detected in a variety of other environments (sometimes retroactively), including subsurface sediments (WA, USA),^[3] estuary water (NC, USA),^[4] moonmilk cave deposits (Comblain-au-Pont, Belgium),^[5] and deep subsurface fracture fluids from a gold mine (SD, USA)^[6]