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Metapolygnathus primitius
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Type
Zone
Age range
229.5–226.5
Ma
International Timescale
Late Triassic
Norian
Carnian
Conodont Zonation
Epigondolella quadrata
Metapolygnathus primitius
Metapolygnathus nodosus
229.6
229.4
229.2
229.0
228.8
228.6
228.4
228.2
228.0
227.8
227.6
227.4
227.2
227.0
226.8
226.6
226.4
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