Helicosphaeroides mullerae

Helicosphaera mullerae Varol, 1989a

Helicosphaera walbersdorfensis Müller, 1974, partim, Plate 4, Figures 35-37, non Plate 2, Figure 15.

Helicosphaera walbersdorfensis Müller -Theodoridis, 1984, Plate 13, Figure 5; Plate 14, Figure 3; Plate 19, Figures 9-11; Plate 26, Figure 4.

Helicolith has a Type I (Helicosphaeroides ampliaperta type) blanket, expanded flange termination and a narrow elongated central opening with an oblique conjunct bar.

Helicosphaera mullerae differs from Helicosphaera californiana (Bukry, 1981) Varol, n. comb. by having a conjunct oblique bar.

Bukry, D., 1981b. Pacific coast coccolith stratigraphy between Point Conception and Cabo Orientes, Deep Sea Drilling Project Leg 63. Initial Reports of the Deep Sea Drilling Project 63, 445-471.

Müller, C., 1974c. Nannoplankton aus dem Mittel-Miozän von Walbersdorf (Burgenland). Senckenbergiana Lethaea 55, 389-405.

Theodoridis, S., 1984. Calcareous nannofossil biostratigraphy of the Miocene and revision of the helicoliths and discoasters. Utrecht Micropaleontological Bulletin. 32, 1-271.

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