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Genus Thecosphaera Haeckel, 1881 Thecosphaera californica Clark & Campbell, 1942 (Fig. 14R, S) Thecosphaera californica Clark & Campbell, 1942: 22, pl. 4, fig. 7; 1945: 10, pl. 1, fig. 10. — Blueford & White 1984: pl. 3, fig. 5. — Blueford 1988: 247, pl. 3, figs 10-12. Thecosphaera californica sumensis Gorbunov, 1979: 91, pl. 12, fig. 1a-b. GEOGRAPHIC DISTRIBUTION. — California, Russian Platform, southern part. STRATIGRAPHIC RANGE. — Middle to latest middle Eocene (Clark & Campbell 1942, 1945; Blueford & White 1984; Blueford 1988); middle Eocene (Khokhlova 1996); late Eocene, Kievsky Group (Gorbunov 1979); early-middle Eocene (this study)., Published as part of 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), pp. 7-59 in Geodiversitas 24 (1) on page 49, DOI: 10.5281/zenodo.5375608, {"references":["HAECKEL E. 1881. - Entwurf eines Radiolarien- Systems auf Grund von Studien der Challenger- Radiolarien (Basis for a radiolarian classification from the study of Radiolaria of the Challenger collection). Jenaische Zeitschrift fur Naturwissenschaft 15: 418 - 472.","CLARK B. L. & CAMPBELL A. S. 1942. - Eocene radiolarian faunas from the Mount Diablo area, California. Geological Society of America, Special Papers 39: 1 - 112.","BLUEFORD J. R. & WHITE L. D. 1984. - Paleoceanographic interpretation of Eocene siliceous deposits from west-central California, in BLUEFORD J. R. (ed.), Kreyenhagen Formation and Related Rocks. Pacific Section, Society of economic Paleontologists and Mineralogists, Los Angeles: 67 - 78.","BLUEFORD J. 1988. - Radiolarian biostratigraphy of siliceous Eocene deposits in central California. Micropaleontology 34 (3): 236 - 258.","GORBUNOV V. S. 1979. - Radiolyarii srednego i verkhnego eotsena Dneprovsko-Donetskoy vpadiny [= Radiolaria of the middle and upper Eocene of the Dnieper-Donets Basin]. [s. n.], [s. l.], 164 p.","CLARK B. L. & CAMPBELL A. S. 1945. - Radiolaria from the Kreyenhagen Formation near Los Banos, California. Geological Society of America 101 (i-vii): 1 - 66.","KHOKHLOVA I. E. 1996. - Paleogenovie radiolarii Ushnoi Rosii: taxonomicheskii sostav i paleoecologicheskie reconstruksii. Stratigrafia, Geologicheskaya korrelasiya 4: 53 - 61."]}

Lithomelissa spongiosa Bütschli, 1882 (Figs 12C; 15I) Lithomelissa spongiosa Bütschli, 1882b: 517, taf. 33, fig. 25. Lithomelissa mitra Chen, 1975: 458, pl. 8, figs 4, 5. GEOGRAPHIC DISTRIBUTION. — Barbados, Antarctic, Voronesh Anticline. STRATIGRAPHIC RANGE. — Eocene, Barbados (Bütschli 1882a, b); Oligocene, Antarctic (Chen 1975); middle to latest Eocene (this study)., Published as part of 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), pp. 7-59 in Geodiversitas 24 (1) on page 37, DOI: 10.5281/zenodo.5375608, {"references":["BUTSCHLI O. 1882 b. - Beitrage zur Kenntnis der Radiolarienskelette, insbesondere der Cyrtida. Zeitschrift fur Wissenschaftliche Zoologie 36: 485 - 540.","CHEN P. H. 1975. - Antarctic Radiolaria, Leg. 28. Initial Reports of the Deep Sea Drilling Project 28: 437 - 513.","BUTSCHLI O. 1882 a. - Radiolaria, in BRONN H. G. (ed.), Klassen und Ordnungen des Thier-Reichs 1: 332 - 478."]}

Theocyrtis litos (Clark & Campbell, 1945) (Fig. 14F) Calocyclas litos Clark & Campbell, 1945: 44, pl. 6, fig. 13. GEOGRAPHIC DISTRIBUTION. — California, Voronesh Anticline. STRATIGRAPHIC RANGE. — Middle to late Eocene (Clark & Campbell 1945; Blueford & White 1984; Blueford 1988); late Eocene (this study). REMARKS The specimen named Albatrossidium litos (see Kozlova 1999: pl. 35, fig. 3) can not be attributed to species named Theocyrtis litos, because of the difference in: 1) shape of the third segment – the holotype has no trend to reduce conicaly the diameter of its operture; and 2) in porosity – the diameter of pores of the third segment is much larger than in the holotype., Published as part of 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), pp. 7-59 in Geodiversitas 24 (1) on page 50, DOI: 10.5281/zenodo.5375608, {"references":["CLARK B. L. & CAMPBELL A. S. 1945. - Radiolaria from the Kreyenhagen Formation near Los Banos, California. Geological Society of America 101 (i-vii): 1 - 66.","BLUEFORD J. R. & WHITE L. D. 1984. - Paleoceanographic interpretation of Eocene siliceous deposits from west-central California, in BLUEFORD J. R. (ed.), Kreyenhagen Formation and Related Rocks. Pacific Section, Society of economic Paleontologists and Mineralogists, Los Angeles: 67 - 78.","BLUEFORD J. 1988. - Radiolarian biostratigraphy of siliceous Eocene deposits in central California. Micropaleontology 34 (3): 236 - 258.","KOZLOVA G. E. 1999. - Radiolarii paleogene boreal'noi oblasti Rossii [= Paleogene Radiolarians of the Russian Boreal Realm]. Practicheskoe rykovodstvo po microfayne Rossii. VNIGRI, Saint-Petersburg, 9, 320 p."]}

Lithostrobus picus (Ehrenberg, 1875) (Figs 7K; 9E) Eucyrtidium picus Ehrenberg, 1875: pl. 11, fig. 1. Lithostrobus picus – Kozlova 1999: pl. 15, fig. 18. GEOGRAPHIC DISTRIBUTION. — Barbados, Voronesh Anticline. STRATIGRAPHIC RANGE. — (?)Late Paleocene-early Eocene (this study)., Published as part of 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), pp. 7-59 in Geodiversitas 24 (1) on page 37, DOI: 10.5281/zenodo.5375608, {"references":["EHRENBERG C. G. 1875. - Fortsetzung der mikrogeologischen Studien als Gesammt-uebersicher mikroskopischen Palaontologie gleichartig analysirter Gebirgsarten der Erde, mit specieller Rucksicht auf den Polycystinen-Mergel von Barbados. Konigliche Akademie der Wissenschaften zu Berlin, 225 p.","KOZLOVA G. E. 1999. - Radiolarii paleogene boreal'noi oblasti Rossii [= Paleogene Radiolarians of the Russian Boreal Realm]. Practicheskoe rykovodstvo po microfayne Rossii. VNIGRI, Saint-Petersburg, 9, 320 p."]}

Amphisphaera megaxyphos tetraxyphos (Clark & Campbell, 1942) (Fig. 16D) Stylosphaera megaxyphos tetraxyphos Clark & Campbell, 1942: 26, pl. 6, figs 1, 8. Anomalocantha (?) sp. – Kozlova, 1999: pl. 29, fig. 6. GEOGRAPHIC DISTRIBUTION. — California, Voronesh Anticline. STRATIGRAPHIC RANGE. — Latest middle Eocene (Clark & Campbell 1942; Blueford & White 1984; Blueford 1988); middle Eocene (Kozlova 1990; 1999; this study)., Published as part of 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), pp. 7-59 in Geodiversitas 24 (1) on page 23, DOI: 10.5281/zenodo.5375608, {"references":["CLARK B. L. & CAMPBELL A. S. 1942. - Eocene radiolarian faunas from the Mount Diablo area, California. Geological Society of America, Special Papers 39: 1 - 112.","KOZLOVA G. E. 1999. - Radiolarii paleogene boreal'noi oblasti Rossii [= Paleogene Radiolarians of the Russian Boreal Realm]. Practicheskoe rykovodstvo po microfayne Rossii. VNIGRI, Saint-Petersburg, 9, 320 p.","BLUEFORD J. R. & WHITE L. D. 1984. - Paleoceanographic interpretation of Eocene siliceous deposits from west-central California, in BLUEFORD J. R. (ed.), Kreyenhagen Formation and Related Rocks. Pacific Section, Society of economic Paleontologists and Mineralogists, Los Angeles: 67 - 78.","BLUEFORD J. 1988. - Radiolarian biostratigraphy of siliceous Eocene deposits in central California. Micropaleontology 34 (3): 236 - 258.","KOZLOVA G. E. 1990. - Philogeneticheskie issledovania kak osnova pri rasrabotke zonal'noi shkali boreal'nogo Paleogena po radiolariyam, in AMON E. O. (ed.), Radiolarii v biostratigrafii. [s. n.], Sverdlovsk: 70 - 81."]}

Callimitra cf. atavia Goll, 1979 (Fig. 16V) Callimitra atavia Goll, 1979: 388, pl. 5, figs 1, 5-9, 11. GEOGRAPHIC DISTRIBUTION. — Equatorial Pacific (Site 77), Voronesh Anticline. STRATIGRAPHIC RANGE. — Early Miocene (Goll 1979); middle to late Eocene (this study)., Published as part of 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), pp. 7-59 in Geodiversitas 24 (1) on page 25, DOI: 10.5281/zenodo.5375608, {"references":["GOLL R. M. 1979. - The Neogene evolution of Zygocircus, Neosemantis and Callimitra: their bearing on nassellarian classification. A revision of the Plagiacanthoidea. Micropaleontology 25: 365 - 396."]}

Tholospyris acuminata Hertwig, 1879 (Fig. 14H) Tholospyris acuminata Hertwig, 1879 sensu Schaaf 1981: 243, pl. 1, fig. 5. GEOGRAPHIC DISTRIBUTION. — Voronesh Anticline. STRATIGRAPHIC RANGE. — Tertiary (Hertwig 1879); middle to late Eocene (this study)., Published as part of 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), pp. 7-59 in Geodiversitas 24 (1) on page 50, DOI: 10.5281/zenodo.5375608, {"references":["HERTWIG R. 1879. - Der Organismus der Radiolarien: iv + 149 p.","SCHAAF A. 1981. - Late Early Cretaceous Radiolaria from Deep Sea Drilling Project Leg 62, in THIEDE J., VALLIER T. L. et al. (eds), Initial Reports of the Deep Sea Drilling Project 62: 419 - 470."]}

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., Published as part of 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), pp. 7-59 in Geodiversitas 24 (1) on page 41, DOI: 10.5281/zenodo.5375608, {"references":["EHRENBERG C. G. 1873. - Grossere Felsproben des Polycystinen-Mergels von Barbados mit weiteren Erlauterungen. Konigliche Preussische Akademie der Wissenschaften zu Berlin: 213 - 263.","EHRENBERG C. G. 1875. - Fortsetzung der mikrogeologischen Studien als Gesammt-uebersicher mikroskopischen Palaontologie gleichartig analysirter Gebirgsarten der Erde, mit specieller Rucksicht auf den Polycystinen-Mergel von Barbados. Konigliche Akademie der Wissenschaften zu Berlin, 225 p.","RIEDEL W. R. 1957. - Geology of Saipan, Mariana Islands. Part 3: Paleontology. Eocene Radiolaria. U. S. Geological Survey Professional Paper 280 (G): 257 - 263.","SANFILIPPO A. & RIEDEL W. R. 1973. - Cenozoic Radiolaria from the Gulf of Mexico, Deep Sea Drilling Project, Leg 10. Initial Reports of the Deep Sea Drilling Project 10: 475 - 611.","PETRUSHEVSKAYA M. G. & KOZLOVA G. E. 1972. - Radiolaria: Deep Sea Drilling Project Leg. 14. Initial Reports of the Deep Sea Drilling Project 14: 495 - 648.","KOZLOVA G. E. 1999. - Radiolarii paleogene boreal'noi oblasti Rossii [= Paleogene Radiolarians of the Russian Boreal Realm]. Practicheskoe rykovodstvo po microfayne Rossii. VNIGRI, Saint-Petersburg, 9, 320 p."]}

Genus Theocotyle Riedel & Sanfilippo, 1970 Theocotyle venezuelensis Riedel & Sanfilippo, 1970 (Fig. 16M) Theocotyle venezuelensis Riedel & Sanfilippo, 1970: 525, pl. 6, figs 9, 10; pl. 7, figs 1, 2; 1971: 740, pl. 1, fig. 11. — Sanfilippo et al. 1985: 685, figs 25.4a-c. Cyrtophormis alta – Kozlova 1999: 155, pl. 30, fig. 7 (not 9); pl. 46, fig. 4. GEOGRAPHIC DISTRIBUTION. — Atlantic Ocean, tropical zone, Voronesh Anticline. STRATIGRAPHIC RANGE. — Late early to early middle Eocene (Sanfilippo & Riedel 1970; Sanfilippo et al. 1985; Kozlova 1999); middle to late Eocene (this study). REMARKS Cyrtophormis (?) alta (Moksyakova, 1961) holotype has no vertical rows of pores on its third segment, as it was observed for Theocotyle venezuelensis during our investigation.

Rhopalocanium pyramis (Haeckel, 1887) (Fig. 9O, P) Dictyophimus pyramis Haeckel, 1887: 1330, pl. 68, fig. 7. Rhopalocanium pyramis – Kozlova 1999: pl. 7, fig. 16. GEOGRAPHIC DISTRIBUTION. — Pacific Ocean, Russian Platform. STRATIGRAPHIC RANGE. — Late Paleocene-Recent (Haeckel 1887; Kozlova 1999); (?)late Paleocene-early Eocene (this study)., Published as part of 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), pp. 7-59 in Geodiversitas 24 (1) on page 48, DOI: 10.5281/zenodo.5375608, {"references":["HAECKEL E. 1887. - Report on the Radiolaria collected by H. M. S. Challenger during the years 1873 - 1876: report on the scientific results of the voyage of the H. M. S. Challenger. Zoology 18: clxxxviii + 1803 p.","KOZLOVA G. E. 1999. - Radiolarii paleogene boreal'noi oblasti Rossii [= Paleogene Radiolarians of the Russian Boreal Realm]. Practicheskoe rykovodstvo po microfayne Rossii. VNIGRI, Saint-Petersburg, 9, 320 p."]}

Druppatractus trichopterus Clark & Campbell, 1942 (Fig. 14L) Druppatractus trichopterus Clark & Campbell, 1942: 34, pl. 5, fig. 4. GEOGRAPHIC DISTRIBUTION. — California, Voronesh Anticline. STRATIGRAPHIC RANGE. — Early to late Eocene (Clark & Campbell 1942; Blueford & White 1984; this study)., Published as part of 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), pp. 7-59 in Geodiversitas 24 (1) on page 31, DOI: 10.5281/zenodo.5375608, {"references":["CLARK B. L. & CAMPBELL A. S. 1942. - Eocene radiolarian faunas from the Mount Diablo area, California. Geological Society of America, Special Papers 39: 1 - 112.","BLUEFORD J. R. & WHITE L. D. 1984. - Paleoceanographic interpretation of Eocene siliceous deposits from west-central California, in BLUEFORD J. R. (ed.), Kreyenhagen Formation and Related Rocks. Pacific Section, Society of economic Paleontologists and Mineralogists, Los Angeles: 67 - 78."]}

Lophocyrtis aspera (Ehrenberg, 1873) emend. Sanfilippo & Caulet 1998 (Figs 11C; 13A, F; 15N) Calocyclas asperum Ehrenberg, 1873: 266; 1875: taf. 8, fig. 15. — Petrushevskaya & Kozlova 1972: 548, pl. 28, figs 16-18. — Petrushevskaya & Kozlova 1979: 144, figs 389, 505-508. — Kozlova 1999: 153, pl. 35, fig. 6. Lophocyrtis aspera emend. Sanfilippo & Caulet 1998: 14, pl. 3B, figs 1, 2, 5-9. GEOGRAPHIC DISTRIBUTION. — Cosmopolite species. STRATIGRAPHIC RANGE. — Middle Eocene to late Oligocene (Sanfilippo & Caulet 1998); middle to late Eocene (this study)., Published as part of 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), pp. 7-59 in Geodiversitas 24 (1) on page 39, DOI: 10.5281/zenodo.5375608, {"references":["EHRENBERG C. G. 1873. - Grossere Felsproben des Polycystinen-Mergels von Barbados mit weiteren Erlauterungen. Konigliche Preussische Akademie der Wissenschaften zu Berlin: 213 - 263.","SANFILIPPO A. & CAULET J. - P. 1998. - Taxonomy and evolution of Paleogene Antarctic and tropical Lophocyrtid radiolarians. Micropaleontology 44 (1): 1 - 43.","EHRENBERG C. G. 1875. - Fortsetzung der mikrogeologischen Studien als Gesammt-uebersicher mikroskopischen Palaontologie gleichartig analysirter Gebirgsarten der Erde, mit specieller Rucksicht auf den Polycystinen-Mergel von Barbados. Konigliche Akademie der Wissenschaften zu Berlin, 225 p.","PETRUSHEVSKAYA M. G. & KOZLOVA G. E. 1972. - Radiolaria: Deep Sea Drilling Project Leg. 14. Initial Reports of the Deep Sea Drilling Project 14: 495 - 648.","PETRUSHEVSKAYA M. G. & KOZLOVA G. E. 1979. - Description of the radiolarian genera and species, in STRELKOV A. A. & PETRUSHEVSKAYA M. G. (eds), Istoriya mikroplanktona Norveshskogo mora. Exploration of the Fauna of the Seas XXIII (XXXI): 86 - 157.","KOZLOVA G. E. 1999. - Radiolarii paleogene boreal'noi oblasti Rossii [= Paleogene Radiolarians of the Russian Boreal Realm]. Practicheskoe rykovodstvo po microfayne Rossii. VNIGRI, Saint-Petersburg, 9, 320 p."]}

Amphisphaera megaxyphos trixyphos (Clark & Campbell, 1942) (Fig. 7L) Stylosphaera megaxyphos trixyphos Clark & Campbell, 1942: 25, pl. 5, fig. 9. GEOGRAPHIC DISTRIBUTION. — California, Voronesh Anticline. STRATIGRAPHIC RANGE. — Middle to latest middle Eocene (Clark & Campbell 1942; Blueford & White 1984; Blueford 1988); (?)late Paleocene-early Eocene (this study)., Published as part of 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), pp. 7-59 in Geodiversitas 24 (1) on page 23, DOI: 10.5281/zenodo.5375608, {"references":["CLARK B. L. & CAMPBELL A. S. 1942. - Eocene radiolarian faunas from the Mount Diablo area, California. Geological Society of America, Special Papers 39: 1 - 112.","BLUEFORD J. R. & WHITE L. D. 1984. - Paleoceanographic interpretation of Eocene siliceous deposits from west-central California, in BLUEFORD J. R. (ed.), Kreyenhagen Formation and Related Rocks. Pacific Section, Society of economic Paleontologists and Mineralogists, Los Angeles: 67 - 78.","BLUEFORD J. 1988. - Radiolarian biostratigraphy of siliceous Eocene deposits in central California. Micropaleontology 34 (3): 236 - 258."]}

Calocyclas extensa contracta Clark & Campbell, 1942 (Fig. 14K) Calocyclas extensa contracta Clark & Campbell, 1942: 85, pl. 8, figs 15, 16. GEOGRAPHIC DISTRIBUTION. — California, Voronesh Anticline. STRATIGRAPHIC RANGE. — Middle to latest middle Eocene (Clark & Campbell 1942; Blueford & White 1984; Blueford 1988); early to middle Eocene (this study)., Published as part of 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), pp. 7-59 in Geodiversitas 24 (1) on page 25, DOI: 10.5281/zenodo.5375608, {"references":["CLARK B. L. & CAMPBELL A. S. 1942. - Eocene radiolarian faunas from the Mount Diablo area, California. Geological Society of America, Special Papers 39: 1 - 112.","BLUEFORD J. R. & WHITE L. D. 1984. - Paleoceanographic interpretation of Eocene siliceous deposits from west-central California, in BLUEFORD J. R. (ed.), Kreyenhagen Formation and Related Rocks. Pacific Section, Society of economic Paleontologists and Mineralogists, Los Angeles: 67 - 78.","BLUEFORD J. 1988. - Radiolarian biostratigraphy of siliceous Eocene deposits in central California. Micropaleontology 34 (3): 236 - 258."]}

Periphaena heliasteriscus (Clark & Campbell, 1942) (Figs 8F, G; 15O, P) Heliodiscus heliasteriscus Clark & Campbell, 1942: 39, pl. 3, figs 10, 11. — Muzylev et al. 1996: 143, fig. 1. Heliodiscus cf. heliasteriscus – Clark & Campbell 1945: 22, pl. 5, fig. 5. Heliodiscus pentasteriscus Clark & Campbell, 1942: 39, pl. 3, fig. 8. — Kozlova 1984: 284, pl. 10, fig. 11. Periphaena heliasteriscus – Sanfilippo & Riedel 1973: 523, pl. 9, figs 1-6, pl. 27, figs 8-10. — Takemura 1992: 743, pl. 4, fig. 13. — Khokhlova et al. 1994: 228, pl. 13.7, fig. 8. — Kozlova 1999: 87, pl. 34, figs 2, 11, 12; pl. 40, fig. 4. GEOGRAPHIC DISTRIBUTION. — Southern Indian Ocean, California, Mexico basin, Western Siberia, eastern slope of the Ural Mountains, Turkmenistan, Russian Platform, southern part. STRATIGRAPHIC RANGE. — Eocene (Kozlova & Gorbovets 1966; Sanfilippo & Riedel 1973); middle Eocene (Clark & Campbell 1942, 1945; Blueford & White 1984); middle Eocene-late Oligocene, Southern Indian Ocean (Takemura 1992), middle-upper Eocene, Mediterranean (Khokhlova et al. 1994); middle-upper Eocene, Fergansk depression (Muzylev et al. 1996); Paleocene-Eocene (Kozlova 1999); (?)late Paleocenelate Eocene (this study)., Published as part of 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), pp. 7-59 in Geodiversitas 24 (1) on pages 41-43, DOI: 10.5281/zenodo.5375608, {"references":["CLARK B. L. & CAMPBELL A. S. 1942. - Eocene radiolarian faunas from the Mount Diablo area, California. Geological Society of America, Special Papers 39: 1 - 112.","MUZYLEV N. G., RASULOV U. M., KHOKHLOVA I. E. & KUSHAKOV A. R. 1996. - The Upper Eocene of the Fergana Depression and Adjacent regions. Stratigraphy and Geological Correlation 4, 2: 38 - 45.","CLARK B. L. & CAMPBELL A. S. 1945. - Radiolaria from the Kreyenhagen Formation near Los Banos, California. Geological Society of America 101 (i-vii): 1 - 66.","EHRENBERG C. G. 1875. - Fortsetzung der mikrogeologischen Studien als Gesammt-uebersicher mikroskopischen Palaontologie gleichartig analysirter Gebirgsarten der Erde, mit specieller Rucksicht auf den Polycystinen-Mergel von Barbados. Konigliche Akademie der Wissenschaften zu Berlin, 225 p.","RIEDEL W. R. & SANFILIPPO A. 1970. - Radiolaria, Leg 4. Initial Reports of the Deep Sea Drilling Project 4: 503 - 575.","GORBUNOV V. S. 1979. - Radiolyarii srednego i verkhnego eotsena Dneprovsko-Donetskoy vpadiny [= Radiolaria of the middle and upper Eocene of the Dnieper-Donets Basin]. [s. n.], [s. l.], 164 p.","GOLL R. M. 1979. - The Neogene evolution of Zygocircus, Neosemantis and Callimitra: their bearing on nassellarian classification. A revision of the Plagiacanthoidea. Micropaleontology 25: 365 - 396.","KOZLOVA G. E. 1984. - Zonal subdivision of the boreal Paleogene by radiolarians. Morphology, ecology and evolution of radiolarians, in PETRUSHEVSKAYA M. G. & STEPANJANTS S. D. (eds), Material from the IVth Symposium of European Radiolarists EURORAD IV. Zoological Institute, Akademiya Nauk SSSR, Leningrad, USSR: 196 - 210,","SANFILIPPO A. & RIEDEL W. R. 1973. - Cenozoic Radiolaria from the Gulf of Mexico, Deep Sea Drilling Project, Leg 10. Initial Reports of the Deep Sea Drilling Project 10: 475 - 611.","TAKEMURA A. 1992. - Radiolarian Paleogene Biostratigraphy in the Southern Indian ocean, Leg 120. Proceedings of the Ocean Drilling Program 120: 735 - 756.","KHOKHLOVA I. E., BRAGINA L. G & KRASHENINNIKOV V. A. 1994. - Zonal stratigraphy of the Upper Cretaceous and Paleogene deposits of the Key Perapedhi Section (Southern Cyprus) by means of radiolarians and correlation with the foraminiferal Zones, in KRASHENINNIKOV V. A. (ed.), Geological Structure of the North-Eastern Mediterranean: 219 - 250.","KOZLOVA G. E. 1999. - Radiolarii paleogene boreal'noi oblasti Rossii [= Paleogene Radiolarians of the Russian Boreal Realm]. Practicheskoe rykovodstvo po microfayne Rossii. VNIGRI, Saint-Petersburg, 9, 320 p.","BLUEFORD J. R. & WHITE L. D. 1984. - Paleoceanographic interpretation of Eocene siliceous deposits from west-central California, in BLUEFORD J. R. (ed.), Kreyenhagen Formation and Related Rocks. Pacific Section, Society of economic Paleontologists and Mineralogists, Los Angeles: 67 - 78."]}

Calocyclas undella (Clark & Campbell, 1942) (Fig. 16Q) Clathrocyclas universa undella Clark & Campbell, 1942: 87, pl. 7, figs 8-10, 21, 25. GEOGRAPHIC DISTRIBUTION. — California, Voronesh Anticline. STRATIGRAPHIC RANGE. — Middle to latest middle Eocene (Clark & Campbell 1942; Blueford & White 1984; Blueford 1988); middle to late Eocene (this study)., Published as part of 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), pp. 7-59 in Geodiversitas 24 (1) on page 25, DOI: 10.5281/zenodo.5375608, {"references":["CLARK B. L. & CAMPBELL A. S. 1942. - Eocene radiolarian faunas from the Mount Diablo area, California. Geological Society of America, Special Papers 39: 1 - 112.","BLUEFORD J. R. & WHITE L. D. 1984. - Paleoceanographic interpretation of Eocene siliceous deposits from west-central California, in BLUEFORD J. R. (ed.), Kreyenhagen Formation and Related Rocks. Pacific Section, Society of economic Paleontologists and Mineralogists, Los Angeles: 67 - 78.","BLUEFORD J. 1988. - Radiolarian biostratigraphy of siliceous Eocene deposits in central California. Micropaleontology 34 (3): 236 - 258."]}

Theocyrtis scolopax (Ehrenberg, 1875) (Fig. 14G) Eucyrtidium scolopax Ehrenberg, 1875: pl. XI, fig. 5. GEOGRAPHIC DISTRIBUTION. — Barbados, Voronesh Anticline. STRATIGRAPHIC RANGE. — Eocene (Ehrenberg 1875); latest Eocene (this study)., Published as part of 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), pp. 7-59 in Geodiversitas 24 (1) on page 50, DOI: 10.5281/zenodo.5375608, {"references":["EHRENBERG C. G. 1875. - Fortsetzung der mikrogeologischen Studien als Gesammt-uebersicher mikroskopischen Palaontologie gleichartig analysirter Gebirgsarten der Erde, mit specieller Rucksicht auf den Polycystinen-Mergel von Barbados. Konigliche Akademie der Wissenschaften zu Berlin, 225 p."]}

Peripyramis magnifica magnifica (Clark & Campbell, 1942) sensu Kozlova 1999 (Fig. 17P, Q) Peripyramis magnifica magnifica – Kozlova 1999: 126, pl. 47, figs 19, 20, 22. GEOGRAPHIC DISTRIBUTION. — Western Siberia, Voronesh Anticline. STRATIGRAPHIC RANGE. — Middle to late Eocene (Lipman et al. 1960); (?)late Paleocene-early Eocene (this study)., Published as part of 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), pp. 7-59 in Geodiversitas 24 (1) on page 45, DOI: 10.5281/zenodo.5375608, {"references":["CLARK B. L. & CAMPBELL A. S. 1942. - Eocene radiolarian faunas from the Mount Diablo area, California. Geological Society of America, Special Papers 39: 1 - 112.","KOZLOVA G. E. 1999. - Radiolarii paleogene boreal'noi oblasti Rossii [= Paleogene Radiolarians of the Russian Boreal Realm]. Practicheskoe rykovodstvo po microfayne Rossii. VNIGRI, Saint-Petersburg, 9, 320 p."]}

Podocyrtis cf. papalis Ehrenberg, 1875 (Fig. 7H) Podocyrtis papalis Ehrenberg, 1875: 62, pl. XV, fig. 6. — Sanfilippo et al. 1989: 696, fig. 30 (1). — Kozlova 1999: 151, pl. 24, figs 16, 17. GEOGRAPHIC DISTRIBUTION. — Of Podocyrtis cf. papalis: Caribbean Sea, Atlantic Ocean, Russian Platform, southern part. STRATIGRAPHIC RANGE. — Paleocene-middle Eocene (Sanfilippo et al. 1989; Nishimura 1992); early-middle Eocene (Kozlova 1999); early Eocene (this study)., Published as part of 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), pp. 7-59 in Geodiversitas 24 (1) on page 46, DOI: 10.5281/zenodo.5375608, {"references":["EHRENBERG C. G. 1875. - Fortsetzung der mikrogeologischen Studien als Gesammt-uebersicher mikroskopischen Palaontologie gleichartig analysirter Gebirgsarten der Erde, mit specieller Rucksicht auf den Polycystinen-Mergel von Barbados. Konigliche Akademie der Wissenschaften zu Berlin, 225 p.","KOZLOVA G. E. 1999. - Radiolarii paleogene boreal'noi oblasti Rossii [= Paleogene Radiolarians of the Russian Boreal Realm]. Practicheskoe rykovodstvo po microfayne Rossii. VNIGRI, Saint-Petersburg, 9, 320 p.","NISHIMURA A. 1992. - Paleocene radiolarian biostratigraphy in the northeast Atlantic at Site 384, Leg 43, of the Deep Sea Drilling Project. Micropaleontology 38 (4): 317 - 362."]}

Druppatractus polycentrus Clark & Campbell, 1942 (Fig. 17A) Druppatractus polycentrus Clark & Campbell, 1942: 35, pl. 5, fig. 19. GEOGRAPHIC DISTRIBUTION. — California, Voronesh Anticline. STRATIGRAPHIC RANGE. — Middle to late Eocene (Clark & Campbell 1942; Blueford & White 1984; Blueford 1988; this study)., Published as part of 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), pp. 7-59 in Geodiversitas 24 (1) on page 31, DOI: 10.5281/zenodo.5375608, {"references":["CLARK B. L. & CAMPBELL A. S. 1942. - Eocene radiolarian faunas from the Mount Diablo area, California. Geological Society of America, Special Papers 39: 1 - 112.","BLUEFORD J. R. & WHITE L. D. 1984. - Paleoceanographic interpretation of Eocene siliceous deposits from west-central California, in BLUEFORD J. R. (ed.), Kreyenhagen Formation and Related Rocks. Pacific Section, Society of economic Paleontologists and Mineralogists, Los Angeles: 67 - 78.","BLUEFORD J. 1988. - Radiolarian biostratigraphy of siliceous Eocene deposits in central California. Micropaleontology 34 (3): 236 - 258."]}

Amphicraspedium murrayanum (Haeckel, 1879) Amphymenium murrayanum Haeckel, 1879: MS et atlas, pl. XLIV, fig. 10. Amphicraspedium murrayanum – Haeckel 1887: 523, pl. 44, fig. 10. GEOGRAPHIC DISTRIBUTION. — Atlantic Ocean, Voronesh Anticline. STRATIGRAPHIC RANGE. — Late Eocene-Quaternary. Middle-Late Eocene (this study)., Published as part of 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), pp. 7-59 in Geodiversitas 24 (1) on page 21, DOI: 10.5281/zenodo.5375608, {"references":["HAECKEL E. 1879. - Ueber die Phaeodarien, eine neue Gruppe Kieselschaliger mariner Rhizopoden. Zitsungsberichte der Jenaischen Gesellschaft fur Medicin und Naturwissenschaft fur das Jahr 1879. Jena.","HAECKEL E. 1887. - Report on the Radiolaria collected by H. M. S. Challenger during the years 1873 - 1876: report on the scientific results of the voyage of the H. M. S. Challenger. Zoology 18: clxxxviii + 1803 p."]}

Carposphaera globosa Clark & Campbell, 1945 (Fig. 16E) Carposphaera globosa Clark & Campbell, 1945: 9, pl. 1, figs 6-8. GEOGRAPHIC DISTRIBUTION. — California, Voronesh Anticline. STRATIGRAPHIC RANGE. — Middle to latest middle Eocene (Clark & Campbell 1945; Blueford & White 1984; Blueford 1988); middle Eocene (this study)., Published as part of 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), pp. 7-59 in Geodiversitas 24 (1) on page 27, DOI: 10.5281/zenodo.5375608, {"references":["CLARK B. L. & CAMPBELL A. S. 1945. - Radiolaria from the Kreyenhagen Formation near Los Banos, California. Geological Society of America 101 (i-vii): 1 - 66.","BLUEFORD J. R. & WHITE L. D. 1984. - Paleoceanographic interpretation of Eocene siliceous deposits from west-central California, in BLUEFORD J. R. (ed.), Kreyenhagen Formation and Related Rocks. Pacific Section, Society of economic Paleontologists and Mineralogists, Los Angeles: 67 - 78.","BLUEFORD J. 1988. - Radiolarian biostratigraphy of siliceous Eocene deposits in central California. Micropaleontology 34 (3): 236 - 258."]}

Amphisphaera megaxyphos megaxyphos (Clark & Campbell, 1942) (Fig. 14O) Stylosphaera megaxyphos megaxyphos Clark & Campbell, 1942: 25, pl. 6, fig. 6. GEOGRAPHIC DISTRIBUTION. — California, Voronesh Anticline. STRATIGRAPHIC RANGE. — Middle to latest middle Eocene (Clark & Campbell 1942; Blueford & White 1984; Blueford 1988); middle-early late Eocene (this study).

Amphisphaera megaxyphos megaxyphos (Clark & Campbell, 1942) (Fig. 14O) Stylosphaera megaxyphos megaxyphos Clark & Campbell, 1942: 25, pl. 6, fig. 6. GEOGRAPHIC DISTRIBUTION. — California, Voronesh Anticline. STRATIGRAPHIC RANGE. — Middle to latest middle Eocene (Clark & Campbell 1942; Blueford & White 1984; Blueford 1988); middle-early late Eocene (this study)., Published as part of 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), pp. 7-59 in Geodiversitas 24 (1) on pages 21-23, DOI: 10.5281/zenodo.5375608, {"references":["CLARK B. L. & CAMPBELL A. S. 1942. - Eocene radiolarian faunas from the Mount Diablo area, California. Geological Society of America, Special Papers 39: 1 - 112.","EHRENBERG C. G. 1875. - Fortsetzung der mikrogeologischen Studien als Gesammt-uebersicher mikroskopischen Palaontologie gleichartig analysirter Gebirgsarten der Erde, mit specieller Rucksicht auf den Polycystinen-Mergel von Barbados. Konigliche Akademie der Wissenschaften zu Berlin, 225 p.","BRANDT R. 1936. - Die Mikropalaeontologie des Heiligenhafener Kieseltones (Ober-Eozan) Radiolarienz Systematik, in WETZEL E. O. (ed.), Jahresbericht des Niedersachsischen geologischen Vereins. Hannover, Germany: 48 - 59.","KOZLOVA G. E. & GORBOVETZ A. N. 1966. - Radiolarians of the Upper Cretaceous and Upper Eocene deposits of the West Siberian Lowland. Proceedings of the All Union Petroleum Scientific Research Institute for Geological Survey (VNIGRI) 248: 1 - 159.","MATO C. Y. & THEYER F. 1980. - Lychnocanoma bandyca n. sp., a new stratigraphically important late Eocene radiolarian, in SLITER W. V. (ed.), Studies in marine micropaleontology and paleoecology. Memorial Volume to Orville L. Bandy. 19, Cushman Foundation for Foraminiferal Research, special publication: 225 - 229.","POPOFSKY A. 1908. - Die Radiolarien der Antarktis (mit Ausnahme der Tripyleen), in DRYGALSKI E. (ed.), Deutsche Sudpolar-Expedition, 1901 - 1903. Georg Reimer, Berlin: 183 - 306.","LIPMAN R. K. 1953. - Materialy k izucheniyu radiolaryii paleogena zapadnykh raionovs srednei azii [= Material for radiolarians study of the Paleogene of the Central Asia - western regions]. Ezhegodnik Vsesoyuznogo Paleontologicheskogo Obshchestva (Akademiya Nauk SSSR) 14: 135 - 157.","BLUEFORD J. R. & WHITE L. D. 1984. - Paleoceanographic interpretation of Eocene siliceous deposits from west-central California, in BLUEFORD J. R. (ed.), Kreyenhagen Formation and Related Rocks. Pacific Section, Society of economic Paleontologists and Mineralogists, Los Angeles: 67 - 78.","BLUEFORD J. 1988. - Radiolarian biostratigraphy of siliceous Eocene deposits in central California. Micropaleontology 34 (3): 236 - 258."]}

Genus Theocotyle Riedel & Sanfilippo, 1970 Theocotyle venezuelensis Riedel & Sanfilippo, 1970 (Fig. 16M) Theocotyle venezuelensis Riedel & Sanfilippo, 1970: 525, pl. 6, figs 9, 10; pl. 7, figs 1, 2; 1971: 740, pl. 1, fig. 11. — Sanfilippo et al. 1985: 685, figs 25.4a-c. Cyrtophormis alta – Kozlova 1999: 155, pl. 30, fig. 7 (not 9); pl. 46, fig. 4. GEOGRAPHIC DISTRIBUTION. — Atlantic Ocean, tropical zone, Voronesh Anticline. STRATIGRAPHIC RANGE. — Late early to early middle Eocene (Sanfilippo & Riedel 1970; Sanfilippo et al. 1985; Kozlova 1999); middle to late Eocene (this study). REMARKS Cyrtophormis (?) alta (Moksyakova, 1961) holotype has no vertical rows of pores on its third segment, as it was observed for Theocotyle venezuelensis during our investigation., Published as part of 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), pp. 7-59 in Geodiversitas 24 (1) on page 50, DOI: 10.5281/zenodo.5375608, {"references":["RIEDEL W. R. & SANFILIPPO A. 1970. - Radiolaria, Leg 4. Initial Reports of the Deep Sea Drilling Project 4: 503 - 575.","SANFILIPPO A., WESTBERG- SMITH M. J., & RIEDEL W. R. 1985. - Cenozoic Radiolaria, in BOLLI H. M., SAUNDERS J. B. & PERCH- NIELSEN K. (eds), Plankton Stratigraphy. Cambridge University Press, Cambridge; New York: 631 - 712.","KOZLOVA G. E. 1999. - Radiolarii paleogene boreal'noi oblasti Rossii [= Paleogene Radiolarians of the Russian Boreal Realm]. Practicheskoe rykovodstvo po microfayne Rossii. VNIGRI, Saint-Petersburg, 9, 320 p.","MOKSYAKOVA A. M. 1961. - Radiolyarii kumskogo gorizonta verkhnego eotsena Zapadnoi Turkmenii [= The radiolarians of the Kumsk Group of the Upper Eocene in western Turkmenistan]. Trudy VNIGNI (44): 231 - 246."]}

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): 7-59, DOI: http://doi.org/10.5281/zenodo.5375608, {"references": ["ABELMANN A. 1990. - Oligocene to Middle Miocene radiolarian stratigraphy of southern high latitudes from Leg 113, sites 689, and 690, Maud Rise. Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program) 113: 675-708.", "BAUMGARTNER P. O., O'DOGHERTY L., GORICHAN S., PILLEVUIT A. & DE WEVER P. 1995. - Middle Jurassic to Lower Cretaceous radiolaria of Tethys: occurrences, systematics, biochronology. Memoires de Geologie 23, 1171 p.", "BENYAMOVSKY V. N., MUZILEV N. G., ORESHKINA T. V., RADIONOVA E. P., KHOKHLOVA I. E., ZASTROSHNOV A. S., MYSATOV V. A. & NAZARKOV A. 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R. & AMON E. O. 1993. - Comparing elongated Spongodiscoidea (Radiolaria) from early Eocene deposits of northwest Turgay, Russia with present world-wide distribution, in BLUEFORD J. & MURCHEY B. (eds), Radiolaria of Giant and Subgiant Fields in Asia. Micropaleontology. Nazarov memorial volume, special publication, New York: 72-89.", "BORISENKO N. N. 1960. - Radiolarii nishnego i srednego eocena Zapadnoi Kybani [= Early-middle Eocene Radiolaria of Western Kuban]. Trudy Vsesoyuznyi Neftegazovyi Nauchno-Issledovalelskii Institut (VNII), Krasnodarskii Filial 4: 219-232.", "BRANDT R. 1936. - Die Mikropalaeontologie des Heiligenhafener Kieseltones (Ober-Eozan) Radiolarienz Systematik, in WETZEL E. O. (ed.), Jahresbericht des Niedersachsischen geologischen Vereins. Hannover, Germany: 48-59.", "BUTSCHLI O. 1882a. - Radiolaria, in BRONN H. G. (ed.), Klassen und Ordnungen des Thier-Reichs 1: 332- 478.", "BUTSCHLI O. 1882b. - Beitrage zur Kenntnis der Radiolarienskelette, insbesondere der Cyrtida. Zeitschrift fur Wissenschaftliche Zoologie 36: 485-540.", "CHEN P. H. 1975. - Antarctic Radiolaria, Leg. 28. Initial Reports of the Deep Sea Drilling Project 28: 437- 513.", "CAMPBELL A. S. &. CLARK B. L. 1944. - Radiolaria from Upper Cretaceous of Middle California. Geological Society of America, Special Paper 57: i-viii, 1-61, pls 1-8.", "CARTER E. S. 1993. - Biochronology and Paleontology of uppermost Triassic (Rhaetian) radiolarians, Queen Charlotte Islands, British Columbia, Canada. Memoires de Geologie 11, 175 p.", "CAULET J.-P. 1991. - Radiolarians from the Kerguelen Plateau, Leg 119, in BARRON J. et al. (eds), Proceedings of the Ocean Drilling Program 119: 513-546.", "CLARK B. L. & CAMPBELL A. S. 1942. - Eocene radiolarian faunas from the Mount Diablo area, California. 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