Ignicoccus
Ignicoccus is a genus of hyperthermophillic Archaea living in marine hydrothermal vents. They were discovered in samples taken at the Kolbeinsey Ridge north of Iceland, as well as at the East Pacific Rise in 2000. Wikipedia
Phylum: Thermoproteota
Domain: Archaea
Class: Thermoprotei
Family: Desulfurococcaceae
Genus: Ignicoccus; Huber, Burggraf, Mayer, Wyschkony, Rachel & Stetter 2000