FIGURE 4 in The Lower Ordovician (upper Floian) bathyurid trilobite Aponileus Hu, with species from Utah, Texas, and Greenland 3293

FIGURE 4. Aponileus glaber (Poulsen, 1927), from the Nunatami Formation (upper Floian), gastropod limestone member (figs 1, 4, 7) and ostracod limestone member (figs 2, 3, 5, 6, 8, 9), Nunatami, Washington Land, northwestern Greenland. 1, 4, 7. Cranidium, MGUH 2391, dorsal, right lateral, and anterior views, x6 (original of Poulsen, 1927, pl. 20, fig. 11). 2, 5, 9. Cranidium, MGUH 2390, dorsal, anterior, and oblique views, x3 (original of Poulsen, 1927, pl. 20, fig. 10). 3, 6, 8. Pygidium, lectotype, MGUH 2406, dorsal, posterior, and left lateral views, x3 (original of Poulsen, 1927, pl. 20, fig. 27).