Petalospyris tumidula Kozlova, 1966

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 : 45

Petalospyris tumidula Kozlova, 1966 ( Figs 9K, L ; 12I, J )

Petalospyris tumidula Kozlova in Kozlova & Gorbovets, 1966: 97, tabl. XV, figs 10, 11. — Kozlova 1984: 204, tabl. XII, fig. 11.

Petalospyris (?) sp. – Gorbunov 1979: 141, tabl. 3, fig. 5. GEOGRAPHIC DISTRIBUTION. — Volga River middle reaches basin, North Caspian Sea lowland, Western Siberia, Voronesh Anticline.

STRATIGRAPHIC RANGE. — Early Eocene (Kozlova & Gorbovets 1966; Kozlova 1984); middle Eocene ( Khokhlova 1996); (?)late Paleocene-early Eocene (this study).

Figures

FIG. 9. — Early Eocene Radiolarian association, Petropavlovka Village, Well 730-C, interval 44.3 m; A, B, F, G, Phormocyrtis sp. aff. proxima Clark & Campbell, 1942; C, D, Pterocodon ampla longispina (Clark & Campbell, 1942) n. comb.; E, Lithostrobus picus (Ehrenberg, 1875); H, Pterocodon ex. gr. ampla (Brandt, 1936); I, J, Pterocodon ampla (Brandt, 1936); K, L(?), Petalospyris tumidula Kozlova, 1966; M, N, Phormocyrtis sp.; O, P, Rhopalocanium pyramis (Haeckel, 1887); Q, Rhopalocanium satelles (Kozlova, 1966); R-T, Dictyoprora urceolus Haeckel, 1887; U, V, Petalospyris sp. aff. septenaria Kozlova, 1966; W, Lychnocanoma cf. bellum Clark & Campbell; X, Y, Mita cf. regina (Campbell & Clark, 1944). Scale bars: 100 µm.

FIG. 12. — Middle Eocene Radiolarian association, Pirogovo Village, Well 510C, interval 44.0 m (except 8: 730C, 44.3 m); A, Ceratocyrtis charlestonensis (Clark & Campbell, 1945); B, E, F, Ceratocyrtis sp. aff. stigi (Bjørklünd, 1976); C, Lithomelissa spongiosa Bütschli, 1882; D, N, Giraffospyris didiceros (Ehrenberg, 1875); G, Patagospyris morkleyensis (Clark & Campbell, 1942); H, K, Giraffospyris sp. aff. didiceros (Ehrenberg, 1875); I, J, Petalospyris tumidula Kozlova, 1966; L, M, Peripyramis magnifica (Clark & Campbell, 1942) sensu Kozlova 1999; O, Heterosestrum formosum (Tochilina, 1970), saggittal view. Scale bars: 50 µm.