Children (14 direct children, 14 direct and indirect children):
Sulfolobus acidocaldarius
Sulfolobus solfataricus
Sulfolobus neozealandicus
Sulfolobus metallicus
Sulfolobus beitou
Sulfolobus vallisabyssus
Sulfolobus shibatae
Saccharolobus shibatae
Sulfolobus tengchongensis
Sulfolobus thuringiensis
Sulfolobus yangmingensis
Sulfolobus islandicus
Sulfolobus tokodaii
Sulfolobus brierleyi
Sulfolobus hakonensis