FIGURE 76. Hoploscaphites peterseni, microconchs. A–D. AMNH 135087, AMNH loc. 3921 in LARGE SCAPHITID AMMONITES (HOPLOSCAPHITES) FROM THE UPPER CRETACEOUS (UPPER CAMPANIAN–LOWER MAASTRICHTIAN) OF NORTH AMERICA: ENDLESS VARIATION ON A SINGLE THEME

FIGURE 76. Hoploscaphites peterseni, microconchs. A–D. AMNH 135087, AMNH loc. 3921, Baculites baculus or lower B. grandis Zone, Pierre Shale, Cedar Creek Anticline, east-central Montana. A, Right lateral; B, apertural; C, ventral; D, left lateral. E–H. AMNH 77597, AMNH loc. 3246, Baculites baculus or lower B. grandis Zone, Pierre Shale, southwest of Wibaux (= Mingusville), Wibaux County, Montana. E, Right lateral; F, apertural; G, ventral; H, left lateral. I–L. AMNH 134704, Pierre Shale, Cedar Creek Anticline, east-central Montana. I, Right lateral; J, apertural; K, ventral; L, left lateral. Arrow indicates the base of the body chamber.