Alicyclobacillus cycloheptanicus

Alicyclobacillus cycloheptanicus is a species of Gram positive, strictly aerobic, bacterium. The bacteria are acidophilic and produce endospores. It was first isolated from soil. The species was originally classified as "Bacillus cycloheptanicus" in 1987, but further 16S rRNA studies found that the species belonged in the newly created genus "Alicyclobacillus". The species name refers ω-cycloheptane fatty acids in the cell membrane.
"A. cycloheptanicus" was among the first three species reclassified from the genus "Bacillus" to the newly created "Alicyclobacillus" in 1992, along with "A. acidocaldarius" and "A. acidoterrestris".
The optimum growth temperature for "A. cycloheptanicus" is 48 °C, and can grow in the 40-53 °C range. The optimum pH is 3.5-4.5, and can grow in pH 3.0-5.5.