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Cyrtocapsella tetrapera
1643
Type
Zone
Age range
23.62–20.53
Ma
International Timescale
Miocene
Burdigalian
Aquitanian
Oligocene
Chattian
Low Latitude Radiolarian Zonation
Stichocorys delmontensis
Cyrtocapsella tetrapera
Lychnocanoma elongata
23.6
23.4
23.2
23.0
22.8
22.6
22.4
22.2
22.0
21.8
21.6
21.4
21.2
21.0
20.8
20.6
20.4
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