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26 results for “Agnostidae”
FIGURE 8 in Taxonomy and stratigraphic distribution of Lotagnostus (Agnostida: Agnostidae) and associated trilobites and conodonts in the Upper Cambrian (Furongian) of Laurentia
FIGURE 8. Estimated distribution of Lotagnostus species within the trilobite and conodont zonations. Probable range (black bar) delineates interval within which occurrences of a species probably lie. Maximum range (dashed lines) denotes full possible range. Abbreviations: C., Corbinia; Elk., Elkanaspis; Ellips., Ellipsocephaloides; I., Irvingella; N., Noelaspis; P., Phylacterus; S., Stigmacephalus; Skull., Skullrockian; Step., Steptoean; Trem., Trempealeauan. Zonal successions from: 1) Westrop, 1995; 2) Miller et al., 2003, 2015; 3) Westrop, 1986; 4) Ludvigsen et al., 1989.
FIGURE 1 in Taxonomy and stratigraphic distribution of Lotagnostus (Agnostida: Agnostidae) and associated trilobites and conodonts in the Upper Cambrian (Furongian) of Laurentia
FIGURE 1. Index maps. (1) Outline map of Nevada, USA, indicating position of 1) Ninemile Canyon in the Antelope Range and 2) the Tybo and Hot Creek sections of Taylor (1976) in the Hot Creek Range. (2) Detail map of central Nevada with outline of T. 15 N., R. 51 E. and location of Ninemile Canyon. (3) Topographic detail of T. 15 N., R. 51 E. from the Ninemile Peak, Nevada 7.5' Quadrangle showing location of section (black band) measured through the Windfall Formation in the tributary on the northeast side of the Ninemile Canyon.
PLATE 3. Bienvillia eurekensis n in Taxonomy and stratigraphic distribution of Lotagnostus (Agnostida: Agnostidae) and associated trilobites and conodonts in the Upper Cambrian (Furongian) of Laurentia
PLATE 3. Bienvillia eurekensis n. sp. Each white scale bar represents 2mm. 1, 6. Cranidium, holotype, CM 41320, from 5/22/08B, dorsal and anterior views. 2, 5. Cranidium, CM 41321, from 5/22/08B, dorsal and left lateral views. 3, 4. Cranidium, USMN 775713, from D3362-CO, dorsal and anterior views. 7. Cranidium, CM 41322, with Mendoparabolina nyensis, from 5/22/08B, dorsal view. 8, 11, 13. Cranidium, CM 41323, from 5/22/08B, dorsal, left lateral, and anterior views. 9. Cranidium, CM 41324, from 5/22/08B, dorsal view. 10, 14. Cranidium, USMN 775714, from D3362-CO, dorsal and right lateral views. 12. Cranidium, USMN 775715, from D3362-CO, dorsal view. 15, 19. Right librigena, CM 41325, from 5/22/08B, external and dorsal views. 16, 17, 20. Pygidium CM 41326, from 5/22/08B, dorsal, posterior oblique and posterior views. 18. Left librigena, USMN 775716, from D3362-CO, dorsal view. 21. Pygidium, USMN 775717, from D3362-CO, dorsal view.
FIGURE 2 in Taxonomy and stratigraphic distribution of Lotagnostus (Agnostida: Agnostidae) and associated trilobites and conodonts in the Upper Cambrian (Furongian) of Laurentia
FIGURE 2. Field photographs of the Windfall Formation, Ninemile Canyon, Nevada. (1) View (facing east) of intermittent exposures of Windfall Formation sampled on north side of tributary of Ninemile Canyon. (2) Intercalated lime grainstone and calcareous shale. (3) Collection horizon for 5/22/08B at hand from middle Windfall. (4) Agnostoid-trilobite coquina from collection 5/22/08B; CM 41300. (5) Recumbent, soft-sediment folds in upper Windfall. (6) Grainstone lens in upper Windfall that yielded 5/22/08D at hammer head. (7) Grainstone boudins and laminated calcareous shales in middle Windfall.
FIGURE 4 in Taxonomy and stratigraphic distribution of Lotagnostus (Agnostida: Agnostidae) and associated trilobites and conodonts in the Upper Cambrian (Furongian) of Laurentia
FIGURE 4. Agnostoid and trilobite species range chart, Windfall Formation, Ninemile Canyon, Nevada.
PLATE 8 in Taxonomy and stratigraphic distribution of Lotagnostus (Agnostida: Agnostidae) and associated trilobites and conodonts in the Upper Cambrian (Furongian) of Laurentia
PLATE 8. Cephala of Lotagnostus nolani n. sp. and Lotagnostus aff. L. nolani. Each white scale bar represents 2mm. 1-17. Lotagnostus nolani n. sp. 1-4. Holotype, CM 41360, from 5/22/08B, dorsal; anterior, left lateral, and anterior oblique views. 5. CM 41361, from 5/22/08B, dorsal view. 6. CM 41362, from 5/22/08B, dorsal view. 7-9. USMN 775724, from D3362-CO, anterior, right lateral, and dorsal views. 10. CM 41301, from 5/22/08B, dorsal view. 11. CM 41302, from 5/22/08B, dorsal view. 12-14. CM 41363, from 5/22/08B, dorsal, anterior, and right lateral views. 15. CM 41364, from 5/22/08B, dorsal view. 16. CM 41365, from 5/22/08B, dorsal view. 17. USMN 775725, from D3362-CO, dorsal view. 18-19. Lotagnostus aff. L. nolani. USMN 775726, from D3381-CO, dorsal and anterior oblique views.
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