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36 results for “Late Ordovician trilobites”
PLATE 13. 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 13. Tesselacauda kriegerae n. sp., from Section G 26.6 m and Section C 111.6 m, both Fillmore Formation (upper Tremadocian; Stairsian; Bearriverops alsacharovi Zone), Ibex area, Millard County, western Utah, USA. 1–4. Cranidium, SUI 147595, dorsal, ventral, left lateral, and anterior views, x6 (G 26.6 m). 5, 6, 8. Cranidium, SUI 147596, dorsal, left lateral, and anterior views, x6 (G 26.6 m). 7, 9, 11, 14, 16. Cranidium, SUI 134173, dorsal, left lateral, ventral, anterior, and oblique views, x7.5 (G 26.6 m). 10, 12, 13, 18. Cranidium, holotype, SUI 147597, left lateral, ventral, dorsal, and anterior views, x6 (C 111.6 m). 15, 25, 26. Cranidium, SUI 147598, left lateral, anterior, and dorsal views, x6 (G 26.6 m). 17, 22, 23. Cranidium, SUI 147599, dorsal, anterior, and left lateral views, x8 (C 111.6 m). 19, 20, 24. Cranidium, SUI 147600, anterior, right lateral, and dorsal views, x6 (G 26.6 m). 21. Cranidium, SUI 147601, dorsal view, x6 (C 111.6 m).
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).
PLATE 12. 1–12, 17. Tesselacauda morrisoni n in Revision of the Early Ordovician (late Tremadocian; Stairsian) cheirurid trilobite Tesselacauda Ross, with species from the Great Basin, western USA
PLATE 12. 1–12, 17. Tesselacauda morrisoni n. sp., from Section MME 49.8 m, Fillmore Formation (upper Tremadocian; Stairsian; Rossaspis leboni Zone), Middle Mountain, Ibex area, Millard County, western Utah, USA. 1, 4, 6, 11. Thoracic segment, SUI 147584, dorsal, anterior, posterior, and left lateral views, x10. 2, 3, 5, 7, 9. Thoracic segment, SUI 147585, right lateral, dorsal, ventral, anterior, and posterior views, x8. 8, 10, 12, 17. Thoracic segment, SUI 147586, dorsal, posterior, anterior, and left lateral views, x10. 13–16, 18–29. Tesselacauda n. sp. A, from Section MME 36.4 m, Fillmore Formation (upper Tremadocian; Stairsian; Rossaspis leboni Zone), Middle Mountain, Ibex area, Millard County, western Utah, USA. 13. Cranidial fragment (probably from same individual as fig. 14), SUI 147587, dorsal view, x7.5. 14. Cranidial fragment (probably from same individual as fig. 13), SUI 147588, dorsal view, x7.5. 15. Pygidium, SUI 147589, dorsal view, x15. 16, 20, 21. Pygidium, SUI 147590, dorsal, right lateral, and posterior views, x12. 18. Pygidium, SUI 147591, dorsal view, x12. 19, 23, 24. Pygidium, SUI 147592, dorsal, posterior, and right lateral views, x15. 22, 28, 29. Pygidium, SUI 147593, dorsal, posterior, and left lateral views, x12. 25–27. Pygidium, SUI 147594, posterior, right lateral, and dorsal views, x12.
PLATE 11. Tesselacauda morrisoni n in Revision of the Early Ordovician (late Tremadocian; Stairsian) cheirurid trilobite Tesselacauda Ross, with species from the Great Basin, western USA
PLATE 11. Tesselacauda morrisoni n. sp., from Section MME 49.8 m, Fillmore Formation (upper Tremadocian; Stairsian; Rossaspis leboni Zone), Middle Mountain, Ibex area, Millard County, western Utah, USA. 1, 3, 4, 7, 10. Pygidium, SUI 147579, dorsal, right lateral, posterior, ventral, and anterior views, x12. 2, 5, 6, 8, 11. Pygidium, SUI 147580, dorsal, posterior, right lateral, ventral, and anterior views, x15. 9, 15, 18. Pygidium, SUI 147581, right lateral, dorsal, and posterior views, x12. 12, 13, 16. Pygidium, SUI 134076, left lateral, dorsal, and posterior views, x15. 14, 17, 21. Pygidium, SUI 147582 dorsal, posterior, and left lateral views, x12. 19, 20, 22. Pygidium, SUI 147583, posterior, dorsal, and left lateral views, x12.
PLATE 6. 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 6. 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, 3, 4. Pygidium, SUI 147546, dorsal, left lateral, and posterior views, x10. 2, 5, 6, 8, 12. Pygidium, SUI 134130, dorsal, left lateral, posterior, ventral, and anterior views, x10. 7, 9, 11, 15, 16. Pygidium, SUI 147547, dorsal, right lateral, posterior, ventral, and anterior views, x10. 10, 18, 20. Pygidium, SUI 147548, right lateral, dorsal, and posterior views, x10. 13, 19, 23. Pygidium, SUI 147549, left lateral, dorsal, and posterior views, x10. 14, 21, 22. Pygidium, SUI 147550, right lateral, posterior, and dorsal views, x12. 17, 24, 25. Pygidium, SUI 147551, left lateral, posterior, and dorsal views, x12.
PLATE 4. 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 4. 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. 1–3, 5, 7. Dorsal exoskeleton, SUI 147531, dorsal, ventral, left lateral, right lateral, and posterior views, x12. 4. Left librigena, SUI 147532, external view, x12. 6, 8. Right librigena, SUI 147533, ventrolateral and external views, x10. 9, 11, 13. Right librigena, SUI 147534, external, internal, and ventrolateral views, x12. 10. Right librigena, SUI 147535, external view, x10. 12, 14. Right librigena, SUI 147536, external and internal views, x12.
PLATE 8. Tesselacauda depressa Ross, 1951, from Section MME 84.0 m in Revision of the Early Ordovician (late Tremadocian; Stairsian) cheirurid trilobite Tesselacauda Ross, with species from the Great Basin, western USA
PLATE 8. Tesselacauda depressa Ross, 1951, from Section MME 84.0 m, Middle Mountain, AAA 79.5 m, northern House Range, both Fillmore Formation, Ibex area, Millard County, western Utah, USA, and HC6 107.5 m, Garden City Formation, west side of Hillyard Canyon, Bear River Range, Franklin County, Idaho, USA (all upper Tremadocian; Stairsian; Bearriverops deltaensis Zone). 1–4, 8. Hypostome, SUI 147559, right lateral, posterior, ventral, anterior, and dorsal views, x12 (HC6 107.5 m). 5, 7, 11. Pygidium, SUI 147560, dorsal, posterior, and left lateral views, x12 (MME 84.0 m). 6, 9, 12, 14, 15. Pygidium and thoracic segment, SUI 147561, dorsal, posterior, ventral, right lateral, and anterior views, x12 (MME 84.0 m). 10, 13, 16, 17, 19. Pygidium, SUI 147562, dorsal, posterior, ventral, right lateral, and anterior views, x15 (AAA 79.5 m). 18, 20, 21. Pygidium, SUI 147563, dorsal, left lateral, and posterior views, x15 (AAA 79.5 m).
PLATE 9. Tesselacauda morrisoni n in Revision of the Early Ordovician (late Tremadocian; Stairsian) cheirurid trilobite Tesselacauda Ross, with species from the Great Basin, western USA
PLATE 9. Tesselacauda morrisoni n. sp., from Section MME 49.8 m, Fillmore Formation (upper Tremadocian; Stairsian; Rossaspis leboni Zone), Middle Mountain, Ibex area, Millard County, western Utah, USA. 1, 2, 4, 7, 10. Cranidium, SUI 147564, dorsal, right lateral, ventral, anterior, and oblique views, x7.5. 3, 5, 6, 9, 12. Cranidium, holotype, SUI 134075, dorsal, left lateral, ventral, anterior, and oblique views, x10. 8, 11, 14. Cranidium, SUI 147565, left lateral, dorsal, and anterior views, x7.5. 13, 16, 18. Cranidium, SUI 147566, dorsal, anterior, and left lateral views, x6. 15, 19, 22. Cranidium, SUI 147567, dorsal, anterior, and left lateral views, x7.5. 17, 20, 21. Cranidium, SUI 147568, left lateral, anterior, and dorsal views, x7.5.
PLATE 5. 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 5. 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, 5, 9, 13. Hypostome, SUI 147537, ventral, right lateral, posterior, and anterior views, x10. 2, 6, 10, 14. Hypostome, SUI 147538, ventral, right lateral, posterior, and anterior views, x10. 3, 7, 11, 15, 19. Hypostome, SUI 147539, ventral, left lateral, posterior, anterior, and dorsal views, x10. 4, 8, 12, 16, 20. Hypostome, SUI 147540, ventral, right lateral, posterior, anterior, and dorsal views, x12. 17, 21, 23, 25. Hypostome, SUI 147541, ventral, right lateral, posterior, and anterior views, x12. 18, 22, 24, 26. Hypostome, SUI 147542, ventral, left lateral, posterior, and anterior views, x12. 27, 30, 32, 35. Hypostome, SUI 147543, ventral, left lateral, posterior, and anterior views, x15. 28, 33, 34, 36. Hypostome, SUI 147544, ventral, left lateral, posterior, and anterior views, x15. 29, 31, 37–39. Pygidium, SUI 147545, dorsal, right lateral, posterior, ventral, and anterior views, x15.
PLATE 7. Tesselacauda depressa Ross, 1951, from Section MME 84.0 m in Revision of the Early Ordovician (late Tremadocian; Stairsian) cheirurid trilobite Tesselacauda Ross, with species from the Great Basin, western USA
PLATE 7. Tesselacauda depressa Ross, 1951, from Section MME 84.0 m, Middle Mountain, AAA 79.5 m, northern House Range, both Fillmore Formation, Ibex area, Millard County, western Utah, USA, and HC6 107.5 m, Garden City Formation, west side of Hillyard Canyon, Bear River Range, Franklin County, Idaho, USA (all upper Tremadocian; Stairsian; Bearriverops deltaensis Zone). 1, 2, 3, 5. Cephalon and thoracic segments, SUI 147552, dorsal, ventral, anterior, and left lateral views, x9 (MME 84.0 m). 4, 7. Cranidium, SUI 147553, left lateral and dorsal views, x7.5 (HC6 107.5 m). 6, 9, 10. Cranidium, SUI 147554, dorsal, anterior, and right lateral views, x10 (MME 84.0 m). 8, 11, 12. Cranidium, SUI 147555, anterior, right lateral, and dorsal views, x12 (MME 84.0 m). 13, 15, 17. Right librigena, SUI 147556, internal, ventrolateral, and external views, x10 (AAA 79.5 m). 14, 18. Left librigena, SUI 147557, internal and external views, x12 (MME 84.0 m). 16. Left librigena, SUI 147558, external view, x12 (AAA 79.5 m).
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.
PLATE 1. Tesselacauda depressa Ross, 1951 in Revision of the Early Ordovician (late Tremadocian; Stairsian) cheirurid trilobite Tesselacauda Ross, with species from the Great Basin, western USA
PLATE 1. Tesselacauda depressa Ross, 1951, from Section HC5 106.7 m, east side of Hillyard Canyon, and Section FB7 102.1 m, Franklin Basin, both Garden City Formation (upper Tremadocian; Stairsian; Bearriverops loganensis Zone), Bear River Range, Franklin County, southeastern Idaho, USA. 1, 2, 6, 9. Cephalon and thoracic segments, SUI 147507, dorsal, ventral, right lateral, and anterior views, x7.5 (FB7 102.1 m). 3–5, 10. Thoracic segments and pygidium, SUI 147508, dorsal, dorsal, ventral, posterior, and left lateral views, x7.5 (FB7 102.1 m). 7, 8, 11, 13. Cranidium, SUI 147509, dorsal, dorsal, right lateral, anterior, and ventral views, x10 (HC5 106.7 m). 12, 14, 15. Cranidium and thoracic segment, SUI 147510, dorsal, dorsal, right lateral, and anterior views, x10 (HC5 106.7 m).
PLATE 2. Tesselacauda depressa Ross, 1951 in Revision of the Early Ordovician (late Tremadocian; Stairsian) cheirurid trilobite Tesselacauda Ross, with species from the Great Basin, western USA
PLATE 2. Tesselacauda depressa Ross, 1951, from Section HC5 106.7 m, east side of Hillyard Canyon, HC6 88.3 m, west side of Hillyard Canyon, and Section FB7 102.1 m, Franklin Basin, both Garden City Formation (upper Tremadocian; Stairsian; Bearriverops loganensis Zone), Bear River Range, Franklin County, southeastern Idaho, USA. 1, 2. Right librigena, SUI 147511, external and internal views, x10 (HC5 106.7 m). 3, 6, 9, 11. Hypostome, SUI 147512, ventral, right lateral, posterior, and anterior views, x8 (FB7 102.1 m). 4, 7, 10, 12. Hypostome, SUI 147513, ventral, left lateral, posterior, and anterior views, x10 (HC6 88.3 m). 5. Left librigena, SUI 147514, external view, x12 (HC5 106.7 m). 8. Right librigena, SUI 147515, external view, x15 (HC5 106.7 m). 13–16. Hypostome, SUI 147516, ventral, dorsal, right lateral, and posterior views, x8 (HC5 106.7 m). 17. Hypostome, SUI 147517, ventral view, x10 (HC5 106.7 m). 18, 21, 22, 24, 25. Pygidium, SUI 147518, dorsal, posterior, left lateral, ventral, and anterior views, x10 (HC5 106.7 m). 19, 20, 23, 27. Pygidium, SUI 147519, left lateral, dorsal, ventral, and posterior views, x10 (HC5 106.7 m). 26, 28, 29. Pygidium, SUI 147520, right lateral, posterior, and dorsal views, x14 (HC5 106.7 m).
FIGURE 2 in Revision of the Early Ordovician (late Tremadocian; Stairsian) cheirurid trilobite Tesselacauda Ross, with species from the Great Basin, western USA
FIGURE 2. Hypostomes of various species of Pliomeridae. 1. Protopliomerella contracta Ross, 1951, SUI 126034, Section G 210.2 m (Floian; Tulean; Protopliomerella contracta Zone), x15. 2. Protopliomerella stegneri McAdams and Adrain, 2011c, SUI 126071, Section G 142.0–144.5T m (Floian; Tulean; unzoned strata beneath Psalikilopsis cuspidicauda Zone), x12. 3. Protopliomerella bowlesi McAdams and Adrain, 2011c, SUI 126108, Section G 162.0T m (Floian; Tulean; low Psalikilopsis cuspidicauda Zone), x15. 4. Protopliomerella okeefeae McAdams and Adrain, 2011c, SUI 126330, Section G 258.2 m (Floian; Tulean; Heckethornia hyndeae Zone), x20. 5. Protopliomerella kerouaci McAdams and Adrain, 2011c, SUI 126173, Section HC6 203.0 m (Floian; Tulean; Psalikilus typicum Zone), x15. 6. Protopliomerella seegeri McAdams and Adrain, 2011c, SUI 126258, Section G 181.8 m (Floian; Tulean; low Psalikilus hestoni Zone), x12. 7. Hintzeia parafirmimarginis McAdams and Adrain, 2011a, Section HC6 165.2 m (Floian; Tulean; Psalikilus spinosum Zone), x10. 8. Hintzeia firmimarginis (Hintze, 1953), SUI 125507, Section G 99.0T-A (Floian; Tulean; Psalikilus spinosum Zone), x7.5. 9. Hinteia celsaora (Ross, 1951), SUI 125588, Section G 118.6 m (Floian; Tulean; Hintzeia celsaora Zone), x12. 10. Panisaspis topscityensis McAdams and Adrain, 2011b, SUI 125736, Section G 210.2 m (Floian; Tulean; Protopliomerella contracta Zone), x10. 11. Panisaspis quattuor (Hintze, 1953), SUI 125785, Section G 174.0 m (Floian; Tulean; Psalikilus typicum Zone), x12. 12. Panisaspis sevierensis McAdams and Adrain, 2011b, SUI 125663, Section H 173.2 m (Floian; Blackhillsian; Psalikilus pikum Zone), x10. 13. Panisaspis millardensis McAdams and Adrain, 2011b, SUI 125628, Section H 187.4 m (Floian; Blackhillsian; Bathyurina plicolabeona Zone), x12. 14. Cybelopsis sp. nov. 1 of Adrain et al. (2009, p. 575, fig. 21B, F), SUI 147645, Section H 290.4 m (Floian; Blackhillsian; "Pseudocybele nasuta" Zone"), x6. 15. Cybelopsis depressa (Young, 1973), SUI 147646, Section H 185.6 m (Floian; Blackhillsian; Bathyurina plicolabeona Zone), x10. 16. Cybelopsis n. sp. 2, SUI 147647, Section H 264.0–267.0T m (Floian; Blackhillsian; Presbynileus ibexensis Zone), x15. 17. Cybelopsis n. sp. 3, SUI 147648, Section J 35.3 m (Floian; Blackhillsian; "Pseudocybele nasuta Zone"), x10.
FIGURE 2 in Revision of the Early Ordovician (late Tremadocian; Stairsian) cheirurid trilobite Tesselacauda Ross, with species from the Great Basin, western USA
FIGURE 2.
PLATE 10. Tesselacauda morrisoni n in Revision of the Early Ordovician (late Tremadocian; Stairsian) cheirurid trilobite Tesselacauda Ross, with species from the Great Basin, western USA
PLATE 10. Tesselacauda morrisoni n. sp., from Section MME 49.8 m, Fillmore Formation (upper Tremadocian; Stairsian; Rossaspis leboni Zone), Middle Mountain, Ibex area, Millard County, western Utah, USA. 1, 2, 4. Cranidium, SUI 147569, dorsal, right lateral, and anterior views, x10. 3, 5, 6. Cranidium, SUI 147570, dorsal, left lateral, and anterior views, x15. 7, 8, 11. Cranidium, SUI 147571, dorsal, right lateral, and anterior views, x15. 9, 13, 16. Cranidium, SUI 147572, dorsal, anterior, and left lateral views, x17. 10, 12, 14. Cranidium, SUI 147573, dorsal, left lateral, and anterior views, x15. 15. Left librigena, SUI 147574, external view, x12. 17, 20. Left librigena, SUI 147575, external and internal views, x12. 18, 21. Right librigena, SUI 147576, external and ventrolateral views, x12. 19, 22. Left librigena, SUI 147577, external and internal views, x12. 23. Left librigena, SUI 147578, external view, x12.
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