The definitive descriptions were published in the late 1930s as part of research into the cause of Q fever, by Edward Holbrook Derrick and Macfarlane Burnet in Australia, and Herald Rea Cox and Gordon Davis at the Rocky Mountain Laboratory (RML) in the United States.
Definitivni opisi objavljeni su u kasnim 1930-im kao dio istraživanja uzroka Q groznice, Edwarda Holbrook Derrick i Macfarlane Burnet u Australiji, Herald Rea Coxa i Gordona Davisa u Rocky Mountain laboratoriju (RML) u Sjedinjenim Američkim Državama.