Knoellia subterranea

Knoellia subterranea is a species of Gram positive, nonmotile, non-sporeforming bacteria. The bacteria are aerobic and mesophilic, and the cells can be irregular rods or coccoid. It was originally isolated from an air sample from cave soil from Reed Flute Cave in Guilin, China. "K. sinensis" was one of the first described species of "Knoellia", being discovered along with the type strain "K. sinensis". The species name refers to its subterranean isolation location.
The optimum growth temperature for "K. subterranea" is 28-37 °C, but cannot grow at 42 °C. The optimum pH is 5.0-9.0.