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. 2018 Sep 26;5(9):181295. doi: 10.1098/rsos.181295

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© 2018 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 4. — (a) Unsupervised clusters of tarsometatarsi, less than 25% missing data. PCA axis 1, 86.8%; PCA axis 2, 4.6%. Cluster 1 = circles, cluster 2a = diamonds, cluster 2b = squares, cluster 3 = triangles. Type specimens/series: filled diamond, A. hildebrandti; filled square, A. cursor; filled triangle, A. ingens. (b) Unsupervised clusters of tarsometatarsi, more than 25% missing data. PCA axis 1, 82.7%; PCA axis 2, 6.6%. Cluster 1 = circles, cluster 2a = diamonds, cluster 2b = squares, cluster 3 = triangles. Type specimens/series: crossed circle, A. hildebrandti; filled diamond, A. lentus; filled square, A. cursor; filled triangle, A. ingens.