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Phormocyrtis striata striata
1657
Type
Zone
Age range
50.3–49
Ma
International Timescale
Eocene
Ypresian
Low Latitude Radiolarian Zonation
Theocotyle cryptocephala
Phormocyrtis striata striata
Buryella clinata
50.3
50.2
50.1
50.0
49.9
49.8
49.7
49.6
49.5
49.4
49.3
49.2
49.1
49.0
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