Pterocodon, Ehrenberg, 1847

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 : 47

Pterocodon ex. gr. ampla ( Brandt, 1936) ( Fig. 9H )

GEOGRAPHIC DISTRIBUTION. — Voronesh Anticline.

STRATIGRAPHIC RANGE. — (?)Late Paleocene-early Eocene (this study).

REMARKS

The Clathrocyclas ampla ( Kozlova 1990: pl. XII, fig. 19), from Western Siberia, Irbitsk Formation, Heliodiscus lentis Zone , is very similar to this specimen, but its size is less.

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.