Wikipedia
Caldicellulosiruptor
Caldicellulosiruptor is a genus of thermophilic, anaerobic, Gram-positive, non- spore forming bacteria. Originally placed within the highly polyphyletic class Clostridia, order Thermoanaerobacterales and family Thermoanaerobacterales Family III according to the NCBI and LPSN, it is now thought to lie outside of the Firmicutes.