Amphisphaera megaxyphos subsp. tetraxyphos

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."]}