Calocyclas talwanii BjØrklund & Kellogg, 1972

Popova, Irina M., Baumgartner, Peter O., Guex, Jean, Tochilina, Svetlana V. & Glezer, Zoya I., 2002, Radiolarian biostratigraphy of Paleogene deposits of the Russian Platform (Voronesh Anticline), Geodiversitas 24 (1), pp. 7-59 : 25

Calocyclas talwanii BjØrklund & Kellogg, 1972 ( Fig. 13B, O )

Calocyclas talwanii BjØrklund & Kellogg, 1972: 387 , pl. 1, figs 1, 6. — BjØrklund 1976: 1124, pl. 21, figs 1-3. — Hull 1996: 137, pl. 4, figs 11, 16.

Clathrocyclas talwanii – Petrushevskaya & Kozlova in Dzionoridze et al. 1978: pl. 27, figs 1, 2; pl. 34, figs 8- 10. — Petrushevskaya & Kozlova 1979: 133, figs 502, 503. — Kozlova 1990: pl. XII, fig. 5. — Kozlova 1999: pl. 44, figs 1, 2.

GEOGRAPHIC DISTRIBUTION. — Norwegian- Greenland-Barents seas, North Caspian Sea lowland, Russian Platform (Voronesh Anticline, Obshii Syrt).

STRATIGRAPHIC RANGE. — Middle Eocene-(?)early Miocene ( BjØrklund 1976; Hull 1996; Eidvin et al. 1998; Kozlova 1999); middle to late Eocene (this study).

Figures

FIG. 13. — Middle Eocene Radiolarian association, Pirogovo Village, Well 510C, interval 44.0 m; A, F, Lophocyrtis aspera (Ehrenberg, 1873); B, O, Calocyclas talwanii Bjørklund & Kellogg, 1972; C, D, Anthocyrtidium pupa Clark & Campbell, 1942; E, I, L, Calocycletta sp. aff. virginis Haeckel, 1887; G, H, Lophocyrtis norvegiensis (Bjørklund & Kellogg, 1972); J, K, Lophocyrtis auriculaleporis (Clark & Campbell, 1942); M, Lophocyrtis sinitzini (Lipman, 1949) sensu Kozlova 1999; N, Phormocyrtis sp. aff. proxima Clark & Campbell, 1942. Scale bars: A-H, J-N, 100 mm; I, O, 50 µm.