FIGURE 7. Principal components analysis of dolichometopid cranial measurements at genus level. Glossopleura = blue polygons. Sonoraspis = red polygons. Anoria = black polygons. A) PC1 vs PC2. B) PC1 vs PC3. C) PC2 vs PC3. Genera coded by color as noted above. Species denoted by symbols as listed alphabetically here: Glossopleura boccar (open blue squares), G. campbelli (open blue diamonds), G. lodensis (blue stars), G. mckeei (solid blue dots), G. mohavensis (blue dashes), G. producta (open blue triangles), G. similaris (vertical blue bars), G. stephenensis (open blue ovals), G. utahensis (inverted open blue triangles), G. walcotti (filled blue triangles), G. yatesi (filled inverted triangles); Sonoraspis californica (filled red circles), S. gomezi (filled red squares); Anoria baton (black X), A. bessus (open black circles), A. tontoensis (filled black squares).

Published as part of Foster, John R., 2022, Continuous character variation within the Glossopleura-Anoria-Sonoraspis plexus: Dolichometopid trilobites from the Cadiz Formation (Cambrian: Miaolingian, Wuliuan), California, pp. 1-25 in Palaeontologia Electronica (a18) 25 (2) on page 11, DOI: 10.26879/1173, http://zenodo.org/record/12656115