Calocycletta sp.

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 : 25-27

Calocycletta sp. aff. virginis Haeckel, 1887 ( Fig. 13E, I, L )

Calocyclas virginis Haeckel, 1887: 1381 , pl. 74, fig. 4.

Albatrossidium laguncularis – Kozlova 1999: 145, pl. 30, figs 10-12; pl. 46, fig. 6.

GEOGRAPHIC DISTRIBUTION. — Turkmenia, Kazakhstan, north Caspian Sea lowland, Voronesh Anticline.

STRATIGRAPHIC RANGE. — Upper Eocene ( Kozlova 1999); middle Eocene (this study).

REMARKS

The second segment is longer and the size of the shell is bigger than that of C. virginis typ., the same differences have been observed between the C. sp. aff. virginis and two species described by Moksyakova (1961): S. laguncularis (p. 240, pl. 1, fig. 12) and T. trimembris (p. 244, pl. 1, fig. 18).

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.