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Fig. 16 in Scaphites Of The ''Nodosus Group'' From The Upper Cretaceous (Campanian) Of The Western Interior Of North America
Fig. 16. Embryonic whorls of Hoploscaphites brevis (Meek, 1876), AMNH loc. 3274, Baculites compressus–B. cuneatus zones, Pierre Shale, Meade County, South Dakota. A–C. Median cross section, AMNH 58522. A. The embryonic shell ends in the primary varix (PV). The ammonitella diameter is 742 Mm and the ammonitella angle is 281u. B. Close-up of the primary varix (PV). The arrow here and in C and D indicates the adoral direction. C. The postembryonic shell emerges from beneath the primary varix (PV) and consists of an outer prismatic (OP) and inner nacreous layer (NA). D–E. Median cross section, AMNH 58531. D. The proseptum (1), its necklike attachment (N), and the flange (F) are visible. E. Closeup of the dorsal portion of the proseptum (1), its necklike attachment (N), and the flange (F). F. Close-up of the ventral portion of the proseptum (1) and its necklike attachment (N).
Fig. 39. Fossil invertebrates from a in Scaphites Of The ''Nodosus Group'' From The Upper Cretaceous (Campanian) Of The Western Interior Of North America
Fig. 39. Fossil invertebrates from a cold seep in the Pierre Shale, Didymoceras cheyennense Zone, AMNH loc. 3418, Custer County, South Dakota. A, B. Baculites corrugatus Elias, 1933, mature macroconch, AMNH 58552, uncoated. Note the series of small scalloped edges along the entire length of the body chamber on both sides (arrows), probably reflecting predation. A. Ventral, with apertural projection on top; B. right lateral, with apertural projection on top. C. Didymoceras cheyennense (Meek
Fig. 14. Scaphite terminology. A in Scaphites Of The ''Nodosus Group'' From The Upper Cretaceous (Campanian) Of The Western Interior Of North America
Fig. 14. Scaphite terminology. A. Macroconch, right lateral view. The shell is oriented in the probable floating position when the body was withdrawn into the body chamber. The umbilical seam of the shaft in
Fig. 11. Fossiliferous concretion BHI 4788 in Scaphites Of The ''Nodosus Group'' From The Upper Cretaceous (Campanian) Of The Western Interior Of North America
Fig. 11. Fossiliferous concretion BHI 4788 from the Baculites cuneatus Zone of the Pierre Shale, Meade County, South Dakota. The concretion contains an adult specimen of B. cuneatus Cobban, 1962, an adult macroconch of Hoploscaphites brevis (Meek, 1876), and ''Inoceramus'' sagensis Owen, 1852.
Fig. 10. B in Scaphites Of The ''Nodosus Group'' From The Upper Cretaceous (Campanian) Of The Western Interior Of North America
Fig. 10. B. Comparison of the biostratigraphy of the upper part of the Campanian in the Western Interior of North America area indicates the biostratigraphic interval corresponding to the ranges of Hoploscaphites nodosus and H. brevis. The
Fig. 10. A in Scaphites Of The ''Nodosus Group'' From The Upper Cretaceous (Campanian) Of The Western Interior Of North America
Fig. 10. A. Acanthoscaphites praequadrispinosus Błaszkiewicz, 1980 (38: pl. 19, figs. 6–8), holotype, IG 1.310.II.17, macroconch, left lateral, Nostoceras (N.) hyatti Zone, Piotrawin, Vistula River Valley, Poland. Forms similar or identical to this species occur in the Baculites reesidei-B. jenseni zones of the Western Interior of North America. The specimen is illustrated natural size.
Fig. 49 in Scaphites Of The ''Nodosus Group'' From The Upper Cretaceous (Campanian) Of The Western Interior Of North America
Fig. 49. Hoploscaphites nodosus (Owen, 1852), macroconchs. A, B. AMNH 58513, locality unknown, probably Pennington County, South Dakota. A. Ventral; B. left lateral. C, D. BHI 4215, Baculites cuneatus Zone, Meade County, South Dakota. C. Right lateral; D. ventral hook. Specimens are illustrated natural size.
Fig. 48 in Scaphites Of The ''Nodosus Group'' From The Upper Cretaceous (Campanian) Of The Western Interior Of North America
Fig. 48. Hoploscaphites nodosus (Owen, 1852), large macroconch, AMNH 47121, Baculites cuneatus–B reesidei zones, Bearpaw Shale, AMNH loc.
Fig. 35 in Scaphites Of The ''Nodosus Group'' From The Upper Cretaceous (Campanian) Of The Western Interior Of North America
Fig. 35. Sublethal injuries in Hoploscaphites nodosus (Owen, 1852). A. Hoploscaphites nodosus (?), microconch, left lateral view, YPM 35631, with a single row of midventral tubercles instead of two rows of ventrolateral tubercles, YPM loc. A1461, Bearpaw Shale, Rosebud County, Montana. B. Hoploscaphites nodosus, macroconch, right lateral view, YPM 35598, with a spiral furrow on the right side of the shell beginning just adoral of the point of exposure, YPM loc. C3347, Pierre Shale, Belle Fourche River, South Dakota. C, D. Hoploscaphites nodosus, microconch, BHI 4912, with a round ''blister'' (arrow) on the venter just adapical of the point of recurvature, Baculites compressus–B. cuneatus zones, Pierre Shale, Meade County, South Dakota. C. Ventral; D. left lateral. Specimens are illustrated natural size.
Fig. 44 in Scaphites Of The ''Nodosus Group'' From The Upper Cretaceous (Campanian) Of The Western Interior Of North America
Fig. 44. Hoploscaphites nodosus (Owen, 1852), small slender macroconch, USNM 12284 (5 Whitfield, 1880: pl. 13, fig. 12) (cast 5 YPM 35578), from ''the Fort Pierre Group, on the Cheyenne River, near Rapid Creek, Black Hills, Dakota.'' A spiral furrow (arrows) extends from the middle of the exposed phragmocone to the point of recurvature on the left side. A. Right lateral; B. aperture; C. ventral; D. left lateral. Specimen is illustrated natural size.
Fig. 9 in Scaphites Of The ''Nodosus Group'' From The Upper Cretaceous (Campanian) Of The Western Interior Of North America
Fig. 9. Stratigraphic section of the Bearpaw Shale on Porcupine Dome, southeast Montana, spanning the Baculites sp. (smooth) to B. grandis zones. The Baculites compressus–B. cuneatus zones are approximately 45 m thick.
Fig. 55 in Scaphites Of The ''Nodosus Group'' From The Upper Cretaceous (Campanian) Of The Western Interior Of North America
Fig. 55. Hoploscaphites nodosus (Owen, 1852), macroconchs, transitional to H. brevis. A–C. USNM 536233, USGS Mesozoic loc. 23072, Pierre Shale, near Sage Creek, Pennington County, South Dakota. A chunk of shell is missing from the adapical part of the body chamber. A. Apertural; B. ventral; C. left lateral. D–F. AMNH 58512, more slender and finely ribbed than holotype, locality unknown. D. Ventral hook; E. apertural; F. left lateral. These specimens are assigned to H. nodosus rather than H. brevis because the body chamber is elongate and the ventrolateral tubercles persist to the aperture. Specimens are illustrated natural size.
Fig. 64 in Scaphites Of The ''Nodosus Group'' From The Upper Cretaceous (Campanian) Of The Western Interior Of North America
Fig. 64. Hoploscaphites nodosus (Owen, 1852), microconchs. A, B. BHI 4220, Baculites compressus Zone, Pierre Shale, Meade County, South Dakota. A. Right lateral; B. apertural. The apertural margin was accidentally ground down during preparation. C–E. BHI 7004, Pierre Shale, Didymoceras cheyennense Zone, Pierre Shale, Custer County, South Dakota. C. Right lateral; D. ventral; E. left lateral. Specimens are illustrated natural size.
Fig. 54 in Scaphites Of The ''Nodosus Group'' From The Upper Cretaceous (Campanian) Of The Western Interior Of North America
Fig. 54. Hoploscaphites nodosus (Owen, 1852), macroconchs. A, B. BHI 4948, Baculites compressus Zone, Pierre Shale, Meade County, South Dakota. A. Ventral; B. left lateral. C, D. YPM 35598, YPM loc. C3347, Pierre Shale, Belle Fourche River, South Dakota. A spiral furrow extends from the point of exposure to the aperture on the right side of the shell (fig. 35B). C. Ventral; D. left lateral. Specimens are illustrated natural size.
Fig. 43 in Scaphites Of The ''Nodosus Group'' From The Upper Cretaceous (Campanian) Of The Western Interior Of North America
Fig. 43. Spacing of ventrolateral tubercles on the adult shell of Hoploscaphites nodosus (Owen, 1852). A. AMNH 9520/1, slender macroconch, possibly one of the original specimens collected by Meek and
Fig. 7 in Scaphites Of The ''Nodosus Group'' From The Upper Cretaceous (Campanian) Of The Western Interior Of North America
Fig. 7. Hoploscaphites brevis (Meek, 1876), microconchs. A–D. USNM 12291 (5 Scaphites nodosus var. quadrangularis), illustrated in Whitfield (1880: pl. 13, figs. 10, 11), said to be from the Pierre Shale ''on the Cheyenne River, near Rapid and French Creeks, and also from beds which contain a mingling of the
Fig. 6. A–C in Scaphites Of The ''Nodosus Group'' From The Upper Cretaceous (Campanian) Of The Western Interior Of North America
Fig. 6. A–C. Hoploscaphites plenus (Meek, 1876), microconch, USNM 365 (5 Scaphites nodosus var. quadrangularis, paratype, cast), illustrated in Meek (1876: pl. 25, fig. 4), said to be from the Pierre Shale on the ''Yellowstone River, Montana, 150 miles above its mouth,'' and probably, more specifically, from the Cedar Creek Anticline, Dawson County, Montana. A. Right lateral; B. ventral; C. left lateral. D–G.
Fig. 5 in Scaphites Of The ''Nodosus Group'' From The Upper Cretaceous (Campanian) Of The Western Interior Of North America
Fig. 5. Hoploscaphites brevis (Meek, 1876), macroconch, holotype, USNM 367, Pierre Shale, probably from the Sage Creek area, Pennington County, South Dakota. A. Right lateral; B. apertural; C. ventral; D. left lateral. Specimen is illustrated natural size.
Fig. 4 in Scaphites Of The ''Nodosus Group'' From The Upper Cretaceous (Campanian) Of The Western Interior Of North America
Fig. 4. Hoploscaphites nodosus (Owen, 1852), macroconch with part of the hook missing, holotype, UC 6381, Pierre Shale, probably from the Sage Creek area, Pennington County, South Dakota. A. Right lateral; B. apertural; C. ventral. Specimen is illustrated natural size.
Fig. 3 in Scaphites Of The ''Nodosus Group'' From The Upper Cretaceous (Campanian) Of The Western Interior Of North America
Fig. 3. Drainage map of southwest South Dakota showing the rivers and creeks mentioned in early accounts of western exploration of part of what was then known as the Nebraska Territory. The numbers 1 and 2 indicate Sage Creek and Bear Creek, respectively, two of the collecting localities of Meek and Hayden in 1853.
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