Helicosphaera girgisii Varol, 1989a
Varol, O. 1989a. Calcareous nannofossil study of the central and western Solomon Islands. In: Vedder, J.G. & Bruns, T.R., (Eds.), Geology and offshore resources of Pacific island arc-Solomon Islands and Bougainville, Papua New Guinea Regions: Houston, Texas, Circum-Pacific Council for Energy and Mineral Resources Earth Sciences Series. 12: 239-268.
Helicosphaera girgisii
Varol, 1989
Late Miocene
The Solomon Islands