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This research was supported by the open founds of Key Laboratory of Marine Mineral Resources, MNR, China,

The Polish National Science Center

Partly supported by organizers of the 3rd International Workshop on Siliceous Microorganisms (Szczecin, Poland, 2014), and partly by State Key Laboratory of Paleobiology and Stratigraphy (Nanjing Institute of Geology and Paleontology, CAS), China

Indirect contribution has been provided within the frame of topical subsidy of the Polish Ministry of Science and Higher Education (to A.W.) and Fulbright and Kościuszko Fellowships (to K.Mc.)