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Swiss Journal of Palaeontology
Fig. 5 | Swiss Journal of Palaeontology

Fig. 5

From: First description of the early Devonian ammonoid Mimosphinctes from Gondwana and stratigraphical implications

Fig. 5

Principal Component Analysis based on the variance–covariance matrix of ratios of all published species of Mimosphinctes. For data see Tab. 2. a PC 1 and 2. b PC 1 and 3. c PC 2 and 3. d Table with Eigenvalues and the percentage of variance of each principal component. The fat circle with the label “Morocco” indicates the position of Mimosphinctes karltschanzi n. sp. M. khanakasuense is excluded here because it differs so strongly from all the other species of the genus in its ribbing (primary to secondary ratio: Fig. 6)

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