PLATE 15. Tesselacauda kriegerae n in Revision of the Early Ordovician (late Tremadocian; Stairsian) cheirurid trilobite Tesselacauda Ross, with species from the Great Basin, western USA

PLATE 15. Tesselacauda kriegerae n. sp., from Section G 26.6–27.0 m and Section C 111.6 m, both Fillmore Formation (upper Tremadocian; Stairsian; Bearriverops alsacharovi Zone), Ibex area, Millard County, western Utah, USA. 1, 5, 9, 13, 17. Hypostome, SUI 147614, ventral, right lateral, posterior, anterior, and dorsal views, x12 (G 26.6 m). 2, 6, 10, 14, 18. Hypostome, SUI 147615, ventral, right lateral, posterior, anterior, and dorsal views, x15 (G 26.6 m). 3, 7, 11, 15. Hypostome, SUI 147616, ventral, right lateral, posterior, and anterior views, x10 (G 26.6 m). 4, 8, 12, 16. Hypostome, SUI 147617, ventral, left lateral, posterior, and anterior views, x15 (C 111.6 m). 19, 20, 24, 28, 31. Pygidium, SUI 147618, left lateral, dorsal, posterior, ventral, and anterior views, x10 (C 111.6 m). 21, 25, 29. Pygidium, SUI 147619, left lateral, dorsal, and posterior views, x10 (G 27.0 m). 22, 23, 30. Pygidium, SUI 147620, posterior, dorsal, and right lateral views, x12 (C 111.6 m). 26, 27, 34. Pygidium, SUI 147621, right lateral, dorsal, and posterior views, x10 (G 27.0 m). 32, 33, 35. Pygidium, SUI 147622, dorsal, posterior, and left lateral views, x10 (C 111.6 m).