Radiolarian biostratigraphy of Paleogene deposits of the Russian Platform (Voronesh Anticline) Author Popova, Irina M. Institute of Geology and Paleontology, University of Lausanne, BFSH- 2 (Switzerland) Irina. Popova @ igp. unil. ch Centro di Studio di Geologia dell’Appennino e delle catene Perimediterranee, via la Pira 4, Firenze (Italy) opova@igp.unil.ch Author Baumgartner, Peter O. Institute of Geology and Paleontology, University of Lausanne, BFSH- 2 (Switzerland) Peter. Baumgartner @ igp. unil. ch aumgartner@igp.unil.ch Author Guex, Jean Institute of Geology and Paleontology, University of Lausanne, BFSH- 2 (Switzerland) Jean. Guex @ igp. unil. ch uex@igp.unil.ch Author Tochilina, Svetlana V. Pacific Oceanological Institute, Vladivostok (Russia) Author Glezer, Zoya I. Union Geological Institute (VSEGEI), Sredny pr. 74, Saint-Petersburg (Russia) text Geodiversitas 2002 24 1 7 59 journal article 10.5281/zenodo.5375608 1638-9395 5375608 Periphaena decora Ehrenberg, 1873 ( Fig. 17H ) Periphaena decora Ehrenberg, 1873: 246 ; 1875 : pl. 28, fig. 6. — Riedel 1957: 258 , pl. 62, fig. 1. — Sanfilippo & Riedel 1973: 523 , pl. 8, figs 8-10, pl. 27, figs 2-5. — Petrushevskaya & Kozlova 1972: 523 , pl. 14, figs 1, 2. GEOGRAPHIC DISTRIBUTION. — Atlantic Ocean, Gulf of Mexico , Voronesh Anticline. STRATIGRAPHIC RANGE. — Eocene-Oligocene ( Petrushevskaya & Kozlova 1972 ); early-middle Eocene ( Sanfilippo & Riedel 1973 ); (?)late Paleoceneearly Eocene (this study). REMARKS The image of Periphaena paleogenica sensu Kozlova (1999: 87 , pl. 13, fig. 4) from early Eocene of Western Siberia is similar to our species.