kyrpidia tusciae kyrpidia tusciae kyrpidia tusciae is a species of gram positive, facultatively anaerobic, thermophilic bacterium. the cells are rod-shaped and form spores. kyrpidia tusciae scientific classification domain: bacteria division: bacillota class: bacilli order: bacillales family: alicyclobacillaceae genus: kyrpidia species: k. tusciae binomial name kyrpidia tusciaebonjour and agano 1984 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.