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PLATE 14 in Taxonomy and stratigraphic distribution of Lotagnostus (Agnostida: Agnostidae) and associated trilobites and conodonts in the Upper Cambrian (Furongian) of Laurentia
PLATE 14. Cephala of Neoagnostus parki n. sp. Each white scale bar represents 2mm. 1-3. Holotype, CM 41394, from 5/22/08B, dorsal, anterior, and left lateral views. 4. CM 41391, from 5/22/08B, dorsal view. 5-6. USMN 775752, from D3362- CO, dorsal and anterior views. 7. CM 41392, from 5/22/08B, dorsal view. 8-10. CM 41393, from 5/22/08B, dorsal, anterior, and right lateral views. 11-12. CM 41390, from 5/22/08B, dorsal and left lateral views.
PLATE 15 in Taxonomy and stratigraphic distribution of Lotagnostus (Agnostida: Agnostidae) and associated trilobites and conodonts in the Upper Cambrian (Furongian) of Laurentia
PLATE 15. Pygidia of Neoagnostus parki n. sp. Each white scale bar represents 2mm. 1-3. CM 41354 from 5/22/08B, dorsal, posterior, and right lateral views. 4. CM 41395, from 5/22/08B, dorsal view. 5. CM 41352, from 5/22/08B, dorsal view. 6. USMN 775753, from D3362-CO, dorsal view. 7. CM 41397, from 5/22/08B, dorsal view. 8. CM 41399, from 5/22/08B, dorsal view. 9. CM 41398, from 5/22/08B, dorsal view. 10-12. CM 41396, from 5/22/08B, dorsal, right lateral, and posterior views. 13. CM 41355, from 5/22/08B, dorsal view. 14. CM 41400, from 5/22/08B, dorsal view.
PLATE 13. Lotagnostus morrisoni n in Taxonomy and stratigraphic distribution of Lotagnostus (Agnostida: Agnostidae) and associated trilobites and conodonts in the Upper Cambrian (Furongian) of Laurentia
PLATE 13. Lotagnostus morrisoni n. sp. Each white scale bar represents 2mm. 1-4. Cephalon, USMN 775747, from D3381- CO, dorsal, anterior, right lateral, and anterior oblique views. 5, 10. Cephalon, CM 41387, from 5/22/08C, dorsal and anterior oblique views. 6-9. Cephalon, CM 41388, from 5/22/08D, dorsal, anterior, lateral, and anterior obliqueviews. 11-14. Pygidium, holotype, CM 41389, from 5/22/08D, dorsal view; posterior oblique, posterior, and right lateral views. 15-16. Pygidium, USNM 775748, from 3D3381-CO, dorsal and posterior oblique views. 17. Pygidium, USMN 775749, from 3D3381-CO, dorsal view. 18. Pygidium, USNM 775750, from 3D3381-CO, dorsal view. 19-20. Pygidium, USMN 775751, from 3D3381-CO, dorsal and posterior oblique views.
PLATE 12. Lotagnostus rushtoni n in Taxonomy and stratigraphic distribution of Lotagnostus (Agnostida: Agnostidae) and associated trilobites and conodonts in the Upper Cambrian (Furongian) of Laurentia
PLATE 12. Lotagnostus rushtoni n. sp. Each white scale bar represents 2mm. 1-3. Cephalon, CM 41383, from 5/22/08D, dorsal, anterior, and left lateral views. 4-6. Cephalon, USMN 775739, from D3383-CO, dorsal, anterior, and right lateral views. 7. Cephalon, USMN 775740, from D3383-CO, dorsal view. 8. Cephalon, USMN 775741, from D3383-CO, dorsal view. 9. Cephalon, USMN 775742, from D3383-CO, dorsal view. 10. Cephalon, CM 41384, from 5/22/08D, dorsal view. 11- 14. Pygidium, holotype, CM 41385, from 5/22/08D, dorsal, posterior, right lateral, and posterior oblique views. 15. Pygidium, USMN 775743, from D3383-CO, dorsal view. 16. Pygidium, USMN 775744, from D3383-CO, dorsal view. 17-19. Pygidium, USMN 775745, from D3383-CO, dorsal, left lateral, and posterior views. 20. Pygidium, CM 41386, from 5/22/08D, dorsal view. 21. Pygidium, USMN 775746, from 3D3381-CO, dorsal view.
FIGURE 3 in Taxonomy and stratigraphic distribution of Lotagnostus (Agnostida: Agnostidae) and associated trilobites and conodonts in the Upper Cambrian (Furongian) of Laurentia
FIGURE 3. Stratigraphic distribution of conodont species from the Windfall Formation at Ninemile Canyon, Nevada. "JR" indicates collections of John Repetski.
PLATE 11 in Taxonomy and stratigraphic distribution of Lotagnostus (Agnostida: Agnostidae) and associated trilobites and conodonts in the Upper Cambrian (Furongian) of Laurentia
PLATE 11. Pygidia of Lotagnostus clarki n. sp. Each white scale bar represents 2mm. 1-4. USMN 775734, from D3362-CO, dorsal, posterior, right lateral, and posterior oblique views. 5, 7 USMN 775735, from D3362-CO, left lateral and dorsal views. 6. CM 41317, from 5/22/08B, dorsal view. 8-10. USMN 775736, from D3362-CO, dorsal, posterior, and left lateral views. 11. CM 41316, from 5/22/08B, dorsal view. 12. CM 41378, from 5/22/08B, dorsal view. 13-15. USMN 775737, from D3362-CO, dorsal, posterior, and right lateral views. 16. USMN 775738, from D3362-CO dorsal view. 17. CM 41379, from 5/22/08B, dorsal view. 18. CM 41380, from 5/22/08B, dorsal view. 19. CM 41381, from 5/22/08B, dorsal view. 20. CM 41382, from 5/22/08B, dorsal view.
FIGURE 7 in Taxonomy and stratigraphic distribution of Lotagnostus (Agnostida: Agnostidae) and associated trilobites and conodonts in the Upper Cambrian (Furongian) of Laurentia
FIGURE 7. Relative abundance of Lotagnostus species, other agnostoids, olenid trilobites, and other trilobites in the El Relincho Formation, Cerro Pelado, of the Argentine Precordillera (Tortello, 2014). Relative abundance based upon total number of sclerites reported.
PLATE 7. Miscellaneous Windfall taxa. Each white scale bar represents 2 in Taxonomy and stratigraphic distribution of Lotagnostus (Agnostida: Agnostidae) and associated trilobites and conodonts in the Upper Cambrian (Furongian) of Laurentia
PLATE 7. Miscellaneous Windfall taxa. Each white scale bar represents 2mm. 1-3. Lotagnostus cf. L. obscurus. USMN 775722, cephalon, from D3362-CO, dorsal, anterior, and left lateral views. 4-6. Rhaptagnostus cf. R. convergens. Cephalon, CM 41350, from 5/22/08B, dorsal, anterior, and right lateral views. 7-9. Lotagnostus cf. L. obscurus. Cephalon, CM 41351, from 5/22/08B, dorsal, anterior, and right lateral views. 10-12. Homagnostus?. Pygidium, CM 41356, from 5/22/08B, dorsal, posterior, and left lateral views. 13-15. Lotagnostus cf. L. obscurus. Pygidium, CM 41353, from 5/22/08B, dorsal, posterior, and left lateral views. 16. Homagnostus? sp. Pygidium, CM 41401, from 5/22/08B, dorsal view. 17-18. Micragnostus cf. M. intermedius. Cephalon, CM 41358, from 5/22/08B, left lateral and dorsal views. 19. Hedinaspis sp. Fragmentary thoracic and/or pygidial fragment, CM 41359, from 5/22/08C, dorsal view. 20. Machairagnostus cf. M. corrugatus. Pygidium, CM 41349, from 5/22/08B, dorsal view. 21-22. Homagnostus? sp. Cephalon, CM 41357, from 5/22/08B, dorsal and anterior views.
PLATE 1 in Taxonomy and stratigraphic distribution of Lotagnostus (Agnostida: Agnostidae) and associated trilobites and conodonts in the Upper Cambrian (Furongian) of Laurentia
PLATE 1. Ontogenetic comparison of Lotagnostus nolani and L. clarki n. sp. All images at same scale and all from collection 5/22/08B. 1-5, 15. L. nolani cephala. 1. CM 41301. 2. CM 41302. 3. CM 41303. 4, 15. CM 41304. 5. CM 41305. 6-10, 21. L. clarki cephala. 6. CM 41310. 7. CM 41311. 8. CM 41312. 9, 21. CM 41313. 10. CM 41314. 11-14, 16. L. nolani pygidia. 11. CM 41306. 12. CM 41307. 13. CM 41308. 14,16. CM 41309. 17-20, 22. L. clarki pygidia. 17. CM 41315, 18. CM 41316. 19. CM 41317. 20. CM 41318. 22. CM 41319.
FIGURE 10 in Taxonomy and stratigraphic distribution of Lotagnostus (Agnostida: Agnostidae) and associated trilobites and conodonts in the Upper Cambrian (Furongian) of Laurentia
FIGURE 10. Morphometric comparisons of some Lotagnostus species. (1) Dimensions measured on cephala. Abbreviations: AAL, Axial Anteroglabella Length; APL, Axial Posteroglabella Length; EBL, Exsaggital, Basal lobe Length; PFL, Preglabellar Field Length. (2) Scatter plot of EBL/APL ratio versus length of the cephalon for 3 species of Lotagnostus. L. "trisectus" refers to species identified by that name from Sweden in previous studies. (3) Scatter plot of PFL/AAL ratio versus length of the cephalon for 4 species of Lotagnostus. (4) Graphic comparison of posteroaxis length/length of axis as a function of pygidial length (excluding articulating half ring) for 3 species of Lotagnostus.
FIGURE 6 in Taxonomy and stratigraphic distribution of Lotagnostus (Agnostida: Agnostidae) and associated trilobites and conodonts in the Upper Cambrian (Furongian) of Laurentia
FIGURE 6. Reconstruction of northern Laurentian platform margin showing environmental settings interpreted for formations that have yielded Lotagnostus, and pie charts showing relative abundances of Lotagnostus, other agnostoids, olenids, and other trilobites. Position of Windfall Formation on the profile is based on the lithofacies documented in the Antelope Range. Rimmed platform profile and lithofacies patterned after reconstruction of Appalachian margin by James et al. (1989, fig. 12).
FIGURE 9 in Taxonomy and stratigraphic distribution of Lotagnostus (Agnostida: Agnostidae) and associated trilobites and conodonts in the Upper Cambrian (Furongian) of Laurentia
FIGURE 9. Revised trilobite and agnostoid species range chart, Tybo and Hot Creek sections, Hot Creek Range, Nevada (after Taylor, 1976, text-fig. 3). Abbreviation: HC Fauna = Hedinaspis-Charchaqia Fauna.
FIGURE 5 in Taxonomy and stratigraphic distribution of Lotagnostus (Agnostida: Agnostidae) and associated trilobites and conodonts in the Upper Cambrian (Furongian) of Laurentia
FIGURE 5. Size frequency distribution for lengths of pygidial axis for Lotagnostus nolani and L. clarki from Collection 5/22/5/22/08B, Windfall Formation, Ninemile Canyon, Nevada
PLATE 10 in Taxonomy and stratigraphic distribution of Lotagnostus (Agnostida: Agnostidae) and associated trilobites and conodonts in the Upper Cambrian (Furongian) of Laurentia
PLATE 10. Cephala of Lotagnostus clarki n. sp. Each white scale bar represents 2mm. 1-4. Holotype, CM 41373, from 5/22/08B, dorsal, anterior, right lateral, and anterior oblique views. 5. USMN 775729, from D3362-CO, dorsal view. 6. USMN 775730, from D3362-CO, dorsal view. 7. CM 41374, from 5/22/08B, dorsal view. 8. CM 41375, from 5/22/08B, dorsal view. 9, 10. USMN 775731, from D3362-CO, dorsal and anterior oblique views. 11-13. USMN 775732, from D3362-CO, dorsal, anterior, and right lateral views. 14, 15. Cephalon, CM 41376, from 5/22/08B, dorsal and anterior oblique views, x9.5. 16. Cephalon, USMN 775733, from D3362-CO, dorsal view, x7.3. 17-19. Cephalon, CM 41377, from 5/22/08B, dorsal, anterior, and left lateral views, x7.0.
PLATE 5 in Taxonomy and stratigraphic distribution of Lotagnostus (Agnostida: Agnostidae) and associated trilobites and conodonts in the Upper Cambrian (Furongian) of Laurentia
PLATE 5. Mendoparabolina nyensis (Taylor, 1976). Each white scale bar represents 2mm. 1. Cranidium, CM 41338, from 5/22/08B, dorsal view. 2. Cranidium, CM 41339, from 5/22/08B, dorsal view. 3-5. Cranidium, CM 41340, from 5/22/08B, dorsal, left lateral, and anterior views. 6. Cranidium, CM 41341, from 5/22/08B, dorsal view. 7. Cranidium, CM 41342, from 5/22/08B, dorsal view. 8. Cranidium, CM 41343, from 5/22/08B, dorsal view. 9, 10, 14. Pygidium, CM 41344, from 5/22/08B, dorsal, lateral, and posterior views. 11. Cranidium, USMN 775719, from D3362-CO, dorsal view. 12. Pygidium, CM 41345, from 5/22/08B, dorsal view. 13. Right librigena, USMN 775720, from D3362-CO, dorsal view. 15. Pygidium, CM 41346, from 5/22/08B, dorsal view. 16. Pygidium, CM 41347, from 5/22/08B, dorsal view. 17. Pygidium, USMN 775721, from D3362-CO, dorsal view. 18. Pygidium, CM 41348, from 5/22/08B, dorsal view.
PLATE 9 in Taxonomy and stratigraphic distribution of Lotagnostus (Agnostida: Agnostidae) and associated trilobites and conodonts in the Upper Cambrian (Furongian) of Laurentia
PLATE 9. Pygidia of Lotagnostus nolani n. sp. Each white scale bar represents 2mm. 1-4. USMN 775727, from D3362-CO, dorsal, posterior, right lateral, and posterior oblique views. 5. CM 41366, from 5/22/08B, dorsal view. 6. CM 41367, from 5/22/08B, dorsal view. 7. USMN 775728, from D3362-CO, dorsal view. 8-10. CM 41368, from 5/22/08B, dorsal, posterior, and left lateral views. 11. CM 41369, from 5/22/08B, dorsal view. 12. CM 41370, from 5/22/08B, dorsal view. 13. CM 41371, from 5/22/08B, dorsal view. 14-16. CM41372, from 5/22/08B, dorsal, posterior, and left lateral views.
PLATE 4 in Taxonomy and stratigraphic distribution of Lotagnostus (Agnostida: Agnostidae) and associated trilobites and conodonts in the Upper Cambrian (Furongian) of Laurentia
PLATE 4. Bienvillia sp. All cranidia except 7 (librigena). Each white scale bar represents 2mm. 1-2. USMN 775718, from D3383-CO, dorsal and anterior views. 3-4. CM 41327, from 5/22/08C, dorsal and right lateral views. 5-6. CM 41328, from 5/22/08D, dorsal and left lateral views. 7. Right librigena, CM 41329, from 5/22/08C, dorsal view. 8. CM 41330, from 5/22/08C, dorsal view. 9. CM 41331, from 5/22/08C, dorsal view. 10. CM 41332, from 5/22/08D, dorsal view. 11. CM 41333, from 5/22/08D, dorsal view. 12. CM 41334, from 5/22/08D, dorsal view. 13. CM 41335, from 5/22/08D, dorsal view. 14. CM 41336, from 5/22/08D, dorsal view. 15. CM 41337, from 5/22/08C, dorsal view.
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.
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