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Table 6 Septal slope factor (short: slope) and intercept of the examined time bins

From: Is the relative thickness of ammonoid septa influenced by ocean acidification, phylogenetic relationships and palaeogeographic position?

Age N species Slope Intercept
Late Triassic 7 0.0081 − 0.0488
Early Jurassic 8 0.0038 0.0042
Middle Jurassic 4 0.0020 0.023
Late Jurassic 1 0.0037 − 0.0191
Early Cretaceous 5 0.0075 − 0.0321