FIGURE 2 in The Lower Ordovician (upper Floian) bathyurid trilobite Aponileus Hu, with species from Utah, Texas, and Greenland 3293

FIGURE 2. Illustrations of states for Character 2, the presence or absence of a fine transverse ridge across the bottom of SO. 1–6, State 0, ridge present. 1. Outgroup state, Acidiphorus teretus (Young, 1973), cranidium SUI 131151, Section H 191.7 m, Fillmore Formation (upper Floian; Blackhillsian; Strigigenalis plicolabeona Zone), western Utah, x18. 2. Outgroup state, Strigigenalis plicolabeona (Young, 1973), cranidium SUI 124830, Section H 191.7 m, Fillmore Formation (upper Floian; Blackhillsian; Strigigenalis plicolabeona Zone), western Utah, x7.5. 3. Outgroup state, Acidiphorus brighti (Hintze, 1953), cranidium SUI 131152, Section H 290.4 m, Wah Wah Formation (upper Floian; Blackhillsian; "Pseudocybele nasuta Zone", Assemblage 1), western Utah, x15. 4. Aponileus belkaae n. sp., cranidium SUI 129264, Section H 294.2 m, Fillmore Formation (upper Floian; Blackhillsian; "Pseudocybele nasuta Zone"), western Utah, x22.5. 5. Aponileus strelkaae n. sp., holotype cranidium SUI 129298, Section J 28.1 m, Wah Wah Formation (upper Floian; Blackhillsian; "Pseudocybele nasuta Zone"), western Utah, x15. 6. Aponileus laikaae n. sp., holotype cranidium SUI 129234, Section H 256–261T m, Fillmore Formation (upper Floian; Blackhillsian; Presbynileus ibexensis Zone), western Utah, x18. 7–12, State 1, ridge absent. 7, 10. Aponileus ugolekae n. sp., cranidia SUI 131127 and 131130, Section J 46.3 m, Wah Wah Formation (upper Floian; Blackhillsian; "Pseudocybele nasuta Zone"), western Utah, x13.5. 8. Aponileus? veterokae n. sp., cranidium SUI 129317, Section J 48.1 m, Wah Wah Formation (upper Floian; Blackhillsian; "Pseudocybele nasuta Zone"), western Utah, x22.5. 9. Aponileus aasei n. sp., dorsal exoskeleton BYU 19975, float high in Section H, Fillmore Formation (upper Floian; Blackhillsian; probably Pseudocybele paranasuta Zone), western Utah, x9. 11. Aponileus latus Hu, 1963, holotype cranidium USNM 143342, Padre Formation (upper Floian; Blackhillsian), western Texas, x4. 12. Aponileus glaber (Poulsen, 1927), cranidium MGUH 2391, Nunatami Formation (upper Floian), gastropod limestone member, northwestern Greenland, x9.