Do marine faunas track lithofacies? Faunal dynamics in the Upper Cretaceous Pierre Shale, Western Interior, USA

Slattery, Joshua S.; Harries, Peter J.; Sandness, Ashley L.

doi:10.1016/j.palaeo.2018.01.038

Cited by 9 publications

(15 citation statements)

References 55 publications

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“…However, scaphitids are generally absent in other low oxygen settings in the WIS, thought to reflect a nektobenthic lifestyle and reliance on well‐oxygenated benthic conditions (Slattery et al . ). A multitude of factors can affect size at maturity in molluscs (Bucher et al .…”

Section: Discussionmentioning

confidence: 97%

Evolutionary stasis, ecophenotypy and environmental controls on ammonite morphology in the Late Cretaceous (Maastrichtian) Western Interior Seaway, USA

et al. 2020

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We test for the presence of evolutionary stasis in a species of Late Cretaceous ammonoid cephalopod, Hoploscaphites nicolletii, from the North American Western Interior Seaway. A comprehensive dataset of morphological traits was compiled across the entire spatial and temporal range of this species. These were analysed in conjunction with sedimentologically and geochemically derived palaeoenvironmental conditions hypothesized to apply selective pressures. All changes in shell shape were observed to be ephemeral and reversable, that is, no unidirectional trend could be observed in any of the morphological traits analysed. Correlations between palaeoenvironmental conditions and morphological traits suggests ecophenotypic processes were at play; however, either environmental changes were too minor and/or provided no isolating mechanism to drive speciation. These data support mechanisms of stasis such as homogenizing gene flow or stabilizing selection under a fluctuating optimum (probably reflecting spatiotemporally heterogeneous palaeoenvironmental conditions). Finally, changes in shell size were not significantly associated with changes in shell‐specific δ18O, despite a correlation between shell size and δ18O averaged across horizons. This suggests a mismatch in scales of geochemical sampling that supports caution when making broad interpretations based on averaged geochemical data.

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Section: Discussionmentioning

confidence: 97%

Evolutionary stasis, ecophenotypy and environmental controls on ammonite morphology in the Late Cretaceous (Maastrichtian) Western Interior Seaway, USA

et al. 2020

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“…The new neritid represents the twenty-sixth genus and the thirty-eighth species to be recorded from the Fox Hills Formation in North Dakota. This snail fauna is small when compared with Maastrichtian faunas of the Mississippi Embayment (Stephenson, 1941; Sohl, 1964, 1971; Dockery, 1993) but is similar compared with the Red Bird fauna of the Pierre Shale and other Western Interior latest Cretaceous sites (Sohl, 1967a, b; Slatterly et al, 2018).…”

Section: Resultsmentioning

confidence: 78%

Neritoptyx hogansoninew species (Gastropoda, Mollusca) from the Upper Cretaceous Fox Hills Formation on the Dakota Isthmus, western United States

Erickson

2018

J. Paleontol.

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In midcontinent North America, the Fox Hills Formation (Upper Cretaceous, upper Maastrichtian) preserves the last marine faunas in the central Western Interior Seaway (WIS).Neritoptyx hogansoninew species, a small littoral snail, exhibited allometric change from smooth to corded ornament and rounded to shouldered shape during growth. Specimens preserve a zig-zag pigment pattern that changes to an axial pattern during growth.Neritoptyx hogansoninew species was preyed on by decapod crustaceans, and spent shells were occupied by pagurid crabs. Dead mollusk shells, particularly those ofCrassostrea subtrigonalis(Evans and Shumard, 1857), provided a hard substrate to which they adhered on the Fox Hills tidal flats. This new neritimorph gastropod establishes a paleogeographic and chronostratigraphic proxy for intertidal conditions on the Dakota Isthmus during the late Maastrichtian. Presence of a neritid extends the marine tropical/temperate boundary in the WIS northward to ~44° late Maastrichtian paleolatitude. Late Maastrichtian closure of the isthmus subsequently altered marine heat transfer by interrupting northward flow of tropical currents from the Gulf Coast by as much as 1 to 1.5 million years before the Cretaceous ended.UUID:http://zoobank.org/3ba56c07-fcca-4925-a2f0-df663fc3a06b

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“…The abundance of B. eliasi diminishes toward the top of the zone to the point where specimens are very rare. Gill and Cobban (1966) and Slattery et al (2018) observed a similar reduction in the number of specimens of B. eliasi toward the top of the zone in east-central Wyoming. In fact, the rarity or near-absence of B. eliasi, and B. baculus Meek and Hayden, 1861, from the overlying zone, has led to uncertainty in FIGURE 4.…”

Section: Pierre Shale East-central Montanamentioning

confidence: 66%

“…The upper Campanian and lower Maastrichtian section at Red Bird, Niobrara County, Wyoming, is nearly complete, and as such, was designated as the informal reference section for the Pierre Shale by Gill and Cobban (1966). It has inspired much research (e.g., Hicks et al, 1999;Slattery et al, 2018;Landman, in press), and we briefly review some stratigraphic details pertinent to the present study ( fig. 2).…”

Section: Regions Pierre Shale East-central Wyomingmentioning

confidence: 99%

Large Scaphitid Ammonites (Hoploscaphites) from the Upper Cretaceous (Upper Campanian–Lower Maastrichtian) of North America: Endless Variation on a Single Theme

Landman

Kennedy

Grier³

et al. 2020

Bulletin of the American Museum of Natural History

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Do marine faunas track lithofacies? Faunal dynamics in the Upper Cretaceous Pierre Shale, Western Interior, USA

Cited by 9 publications

References 55 publications

Evolutionary stasis, ecophenotypy and environmental controls on ammonite morphology in the Late Cretaceous (Maastrichtian) Western Interior Seaway, USA

Evolutionary stasis, ecophenotypy and environmental controls on ammonite morphology in the Late Cretaceous (Maastrichtian) Western Interior Seaway, USA

Neritoptyx hogansoninew species (Gastropoda, Mollusca) from the Upper Cretaceous Fox Hills Formation on the Dakota Isthmus, western United States

Large Scaphitid Ammonites (Hoploscaphites) from the Upper Cretaceous (Upper Campanian–Lower Maastrichtian) of North America: Endless Variation on a Single Theme

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