NDLI: Late Cretaceous radiolarians of the genera Cuboctostylus Bragina and Hexacromyum Haeckel: Their stratigraphic and paleobiogeographical distribution

Content Provider	Springer Nature Link
Author	Bragina, L. G.
Copyright Year	2013
Abstract	Recently, representatives of the genus Cuboctostylus Bragina (order Entactinaria) were included in the Upper Cretaceous radiolarian regional stratigraphic scale of Sakhalin. The Late Cretaceous species Hexacromyum pergamenti Bragina (order Spumellaria) has morphological similarity to representatives of the genus Cuboctostylus. Peculiar features of H. pergamenti internal structure are considered. Collections of Upper Cretaceous radiolarians from southern Cyprus, Serbia, northern Turkey, Crimean Mountains, East European Platform, northwestern Kamchatka, eastern slope of the Sredinnyi Range in Kamchatka, and Shikotan Island (Lesser Kurile Range) were used for the analysis of the taxonomic composition of Late Cretaceous representatives of the genera Cuboctostylus Bragina and Hexacromyum Haeckel as well as their stratigraphic and paleobiogeographic distribution. It is established that Cuboctostylus is distributed from tropical to south boreal realms. This genus is shown to exist through almost the entire Late Cretaceous: from the middle Cenomanian to initial Maastrichtian. Hexacromyum Haeckel populated both the south boreal realm and marginal areas of the Tethys Ocean in the Late Cretaceous. The new data presented may be used for distant interregional correlations. Cuboctostylus stellatus sp. nov. and several other Cuboctostylus taxa identified in open nomenclature are described; some morphological features of Hexacromyum pergamenti are specified.
Starting Page	79
Ending Page	95
Page Count	17
File Format	PDF
ISSN	08695938
Journal	Stratigraphy and Geological Correlation
Volume Number	21
Issue Number	1
e-ISSN	15556263
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2013-02-06
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Upper Cretaceous radiolarians spicule-bearing stratigraphy paleobiogeography Tethys south boreal realm Historical Geology Structural Geology Geophysics/Geodesy Sedimentology Archaeology
Content Type	Text
Resource Type	Article
Subject	Geology Stratigraphy Paleontology

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