PLATE 3. Tesselacauda depressa Ross, 1951, from Section MME 75.5 m in Revision of the Early Ordovician (late Tremadocian; Stairsian) cheirurid trilobite Tesselacauda Ross, with species from the Great Basin, western USA

PLATE 3. Tesselacauda depressa Ross, 1951, from Section MME 75.5 m, Fillmore Formation (upper Tremadocian; Stairsian; Bearriverops loganensis Zone), Middle Mountain, Ibex area, Millard County, western Utah, USA. 1, 4, 7. Cranidium, SUI 147521, dorsal, anterior, and left lateral views, x5. 2, 5, 10. Cranidium, SUI 147522, dorsal, left lateral, and anterior views, x6. 3, 6, 9. Cranidium, SUI 147523, dorsal, anterior, and left lateral views, x6. 8, 11, 17, 22. Cranidium, SUI 134129, left lateral, dorsal, ventral, and anterior views, x6. 12, 14, 15. Cranidium, SUI 147524, dorsal, left lateral, and anterior views, x6. 13, 16, 19. Cranidium, SUI 147525, dorsal, anterior, and left lateral views, x5. 18, 23, 30. Cranidium, SUI 147526, dorsal, anterior, and left lateral views, x9. 20, 21. Cranidium, SUI 147527, dorsal and anterior views, x6. 24, 26, 27. Cranidium, SUI 147528, anterior, left lateral, and dorsal views, x9. 25, 28, 29, 31. Cranidium, SUI 147529, anterior, left lateral, ventral, and dorsal views, x6. 32. Cranidium, SUI 147530, dorsal view, x6.