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Fig. 17 | Swiss Journal of Palaeontology

Fig. 17

From: Analysis of septal spacing and septal crowding in Devonian and Carboniferous ammonoids

Fig. 17

Bivariate plots of conch parameters and septal spacing (of the last half volution) in the family Prionoceratidae (grey background dots represent the entire sample). A, D, G, J, M Conch width index (ww/dm) and septal spaces. B, E, H, K, N Whorl width index (ww/wh) and septal spaces. C, F, I, L, O Whorl expansion rate (WER) and septal spaces. AC All representatives. DF Late Tournaisian assemblage. GI Early Tournaisian assemblage. JL Late Famennian assemblage. MO Middle Famennian assemblage

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