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![A biostratigraphically important leaf fossil from the Raton megaflora. A, Credneria protophylloides (Knowlton, 1917), which had been referred mistakenly by Knowlton (1917) to the Vermejo megaflora (Berry, 2016). This photograph of the type specimen (NMNH P-34510) is courtesy of Matthew Miller of the NMNH and was taken by Lawrence O’Reilly for the purposes of this research. B, Credneria aff. integerrima from the Santonian Illokunnguaq megaflora of western Greenland (reproduced from Heer, 1883, plate 36, fig. 4).]()
![Regional fossil succession in the late Campanian–Maastrichtian. Key to numbered taxa (complete stratigraphic ranges in light gray; abundance biozones of select taxa in dark gray; asterisks indicate biozones present in the Raton Basin); ab=ammonite biozone: (1)Didymoceras cheyennense ab*; (2)Baculites compressus ab*; (3)Baculites cuneatus ab*; (4)Baculites reesidei ab*; (5)Baculites jenseni ab*; (6)Baculites eliasi ab*; (7)Baculites baculus ab*; (8)Baculites grandis ab*; (9)Baculites clinolobatus ab* – “Inoceramus” balchii inoceramid biozone* (undifferentiated); (10)Hoploscaphites birkelundae ab*; (11)Hoploscaphites nicolletii ab; (12)Hoploscaphites nebrascensis ab; (13) CC 24 nannoplankton biozone; (14) CC 25 nannoplankton biozone; (15) CC 26 nannoplankton biozone (16); Hoploscaphites spedeni ab; (17)Hoploscaphites angmartussutensis ab; (18)Wodehouseia spinata palynomorph assemblage biozone*; (19)“Cissites” panduratus megafloral biozone*; (20)Trochocyathus egerius solitary coral biozone*; (21)Baculites undatus ab*; (22)Heteroconopeum ovatum bryozoan biozone*; (23)Hoploscaphites sargklofak ab*; (24)Credneria protophylloides megafloral biozone*; (25)Trochocyathus mitratus – T. speciosus solitary coral biozones (undifferentiated; truncated at top); (26) Known stratigraphic distribution of eastern North American lambeosaurine – ceratopsid dinosaurs (undifferentiated); (27)Ilexpollenites compactus palynomorph biozone*; (28)Tenuipteria fibrosa (radially ribbed variety) bivalve biozone; (29)Tenuipteria fibrosa (concentrically ribbed variety) bivalve biozone*; (30)Baculites meeki ab; (31)Coahuilites sheltoni ab; (32) Known stratigraphic distribution of western North American lambeosaurine and ceratopsid dinosaurs (undifferentiated); (33)Lophidiaster (L. pygmaeus and L. aff. pygmaeus undifferentiated; truncated at base and top). Ages are from Ogg et al. (2016).]()
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Credneria protophylloides
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Journal Article
New paleontological constraints on the paleogeography of the Western Interior Seaway near the end of the Cretaceous (late Campanian–Maastrichtian) with a special emphasis on the paleogeography of southern Colorado, U.S.A. Available to Purchase
Journal: Rocky Mountain Geology
Publisher: University of Wyoming
Published: 01 June 2017
Rocky Mountain Geology (2017) 52 (1): 1–16.
..., such as “ Cissites ” panduratus and Credneria protophylloides , among landmasses previously isolated by epeiric seaways covering much of North America and western Greenland during the Late Cretaceous and is consistent with preexisting biostratigraphic constraints on the paleogeography of the WIS. The obvious...
FIGURES
Image
A biostratigraphically important leaf fossil from the Raton megaflora. A ... Available to Purchase
in New paleontological constraints on the paleogeography of the Western Interior Seaway near the end of the Cretaceous (late Campanian–Maastrichtian) with a special emphasis on the paleogeography of southern Colorado, U.S.A.
> Rocky Mountain Geology
Published: 01 June 2017
Figure 7. A biostratigraphically important leaf fossil from the Raton megaflora. A , Credneria protophylloides ( Knowlton, 1917 ), which had been referred mistakenly by Knowlton (1917) to the Vermejo megaflora ( Berry, 2016 ). This photograph of the type specimen (NMNH P-34510) is courtesy
Image
Regional fossil succession in the late Campanian–Maastrichtian. Key to numb... Available to Purchase
in New paleontological constraints on the paleogeography of the Western Interior Seaway near the end of the Cretaceous (late Campanian–Maastrichtian) with a special emphasis on the paleogeography of southern Colorado, U.S.A.
> Rocky Mountain Geology
Published: 01 June 2017
) Credneria protophylloides megafloral biozone*; (25) Trochocyathus mitratus – T. speciosus solitary coral biozones (undifferentiated; truncated at top); (26) Known stratigraphic distribution of eastern North American lambeosaurine – ceratopsid dinosaurs (undifferentiated); (27) Ilexpollenites
