Figure 17. Partitions around medoids (PAM) analysis of the Proterosuchidae and Erythrosuchidae subset dataset in: A) two groups and B) three groups. With two groups, red is Proterosuchidae + Sarmatosuchus and green is Erythrosuchidae. With three groups, red is some proterosuchids, green is Erythrosuchidae, and blue is other proterosuchids + Sarmatosuchus. Ixalerpeton and with many pterosaurs. As expected with a dataset containing taxa from multiple created kinds, the MDS results are quite confusing (Figure 37). The pterosaurs are one side, not mixed with the dinosauromorphs and Teleocrater, but there is not as clear a gap in character space between the Pterosauromorpha and Dinosauromorpha as one might predict from the BDC results. The aphanosaur Yarasuchus and the lagerpetid Lagerpeton do not cluster with any other taxa. We determined to split the avemetatarsalian subset into three subset analyses: 1) Dinosauromorpha (Dinosauria + Silesauridae + Lagosuchus), 2) Pterosauromorpha (Pterosauria + Lagerpetidae), and 3) “basal” Avemetatarsalia (Aphanosauria + Lagerpetidae + Silesauridae + Lagosuchus). L. Dinosauromorpha Both the Pearson and Spearman BDC plots for the dinosauromorph subset analysis revealed three groups of positive correlation: Ornithischia, Saurischia, and Silesauridae + Lagosuchus (Figure 38). The Spearman BDC plot (Figure 38B) did show positive correlation linking the ornithischian Lesothosaurus to two theropods: Coelophysis and Megapnosaurus. The Pearson BDC plot (Figure 38A) had the silesaurid Silesaurus sharing positive correlation only with the silesaurid Asilisaurus, and there were fewer instances of shared positive correlation within Saurischia. The MDS results for the dinosauromorpha subset match the BDC results perfectly with three easily MCLAIN, CLAUSEN, PEREZ, BEEBE, AND AHTEN Archosauromorph Baraminology 2023 ICC 504
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