Fig. 6 in Brachiopods from the Middle Ordovician Shihtzupu Formation of Yunnan Province, China

Fig. 6. Principal component analysis (PCA) of 10 selected brachiopod faunas from uppermost Arenigian–middle Caradocian of South China, Kazakhstan, Avalonia, Sibumasu, and Laurentia, performed using PAST (Hammer et al. 2004). Data matrix: variance−covariance; Algorithm: singular value decomposition (SVD). See Fig. 5 for abbreviations of the faunas and Appendix 1 for number codes.