Kyrpidia tusciae

Kyrpidia tusciae is a species of Gram positive, facultatively anaerobic, thermophilic bacterium. The cells are rod-shaped and form spores.
"K. tusciae" was first isolated from ponds in a fumerole in Tuscany, Italy. It was originally classified as "Bacillus tusciae" in 1984, but in 2011 further tests led to the creation of the genus "Kyrpidia", of which "K. tusciae" was the first and only member.
The optimum growth temperature for "K. tusciae" is 55 °C, and can grow in the 42-67 °C range. Its optimum pH is 4.2-4.8, and grows in pH range 4.2-7.5.