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Siphonodella sandbergi-Siphonodella belkai
633
Type
Zone
Age range
357.4–355
Ma
International Timescale
Mississippian
Tournaisian
Conodont Zonation
Siphonodella quadruplicata-Patrognathus andersoni
Siphonodella sandbergi-Siphonodella belkai
Siphonodella duplicata
357.5
357.4
357.3
357.2
357.1
357.0
356.9
356.8
356.7
356.6
356.5
356.4
356.3
356.2
356.1
356.0
355.9
355.8
355.7
355.6
355.5
355.4
355.3
355.2
355.1
355.0
354.9
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