Cephalopods From the Cretaceous/Tertiary Boundary Interval on the Atlantic Coastal Plain, With a Description of the Highest Ammonite Zones in North America. Part Iii. Manasquan River Basin, Monmouth County, New Jersey

Landman, Neil H.; Johnson, R.; Garb, Matthew P.; Edwards, Lucy E.; Kyte, Frank T.

doi:10.1206/0003-0090(2007)303[1:cfttbi]2.0.co;2

Cited by 42 publications

(20 citation statements)

References 115 publications

(258 reference statements)

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“…36F; for further discussion about ''kitchen middens,'' see Radwań ski, 1996). Lethal injuries have been documented in Late Cretaceous scaphites from the West-ern Interior , the Atlantic Coastal Plain (Landman et al, 2007a), and the Vistula River Valley, central Poland (Radwań ski, 1996).…”

Section: Pathologic Specimensmentioning

confidence: 99%

“…This association has generally been interpreted as indicating that the animals lived, died, and were preserved at approximately the same site (Tanabe, 1979;Landman et al, 2007a;Wani et al, 2005;Wani, 2007). If an ammonite floated after death, its soft body would have fallen out, and the jaw would have either been lost or preserved at a different site than the shell.…”

Section: Habitatmentioning

confidence: 99%

See 1 more Smart Citation

Scaphites of the “Nodosus Group” from the Upper Cretaceous (Campanian) of the Western Interior of North America

Landman¹,

Kennedy²,

Cobban

et al. 2010

Bulletin of the American Museum of Natural History

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Section: Pathologic Specimensmentioning

confidence: 99%

Section: Habitatmentioning

confidence: 99%

Scaphites of the “Nodosus Group” from the Upper Cretaceous (Campanian) of the Western Interior of North America

Landman¹,

Kennedy²,

Cobban

et al. 2010

Bulletin of the American Museum of Natural History

Self Cite

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“…Ammonoids have been reported from beds above the K/Pg boundary. Most of these records reflect reworked specimens or resulted from an erroneously placed K/Pg boundary level (Sadler, 1988; Landman, Johnson & Edwards, 2004 a , b ; Landman et al ., 2007 a ). However, some may belong to possible extinction event victims or even were true short‐term survivors.…”

Section: Heteromorphs Through Timementioning

confidence: 99%

“…In New Jersey (USA), non‐reworked ammonoids were found above an iridium anomaly, which likely represents the K/Pg boundary (Landman et al ., 2007 a , 2010 a , 2012 c , 2014, 2015). In the Pinna Layer, which contains the iridium anomaly at its base, the fauna is dominated by the heteromorphs Discoscaphites and Eubaculites .…”

Section: Heteromorphs Through Timementioning

confidence: 99%

Recent advances in heteromorph ammonoid palaeobiology

et al. 2021

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Heteromorphs are ammonoids forming a conch with detached whorls (open coiling) or non‐planispiral coiling. Such aberrant forms appeared convergently four times within this extinct group of cephalopods. Since Wiedmann's seminal paper in this journal, the palaeobiology of heteromorphs has advanced substantially. Combining direct evidence from their fossil record, indirect insights from phylogenetic bracketing, and physical as well as virtual models, we reach an improved understanding of heteromorph ammonoid palaeobiology. Their anatomy, buoyancy, locomotion, predators, diet, palaeoecology, and extinction are discussed. Based on phylogenetic bracketing with nautiloids and coleoids, heteromorphs like other ammonoids had 10 arms, a well‐developed brain, lens eyes, a buccal mass with a radula and a smaller upper as well as a larger lower jaw, and ammonia in their soft tissue. Heteromorphs likely lacked arm suckers, hooks, tentacles, a hood, and an ink sac. All Cretaceous heteromorphs share an aptychus‐type lower jaw with a lamellar calcitic covering. Differences in radular tooth morphology and size in heteromorphs suggest a microphagous diet. Stomach contents of heteromorphs comprise planktic crustaceans, gastropods, and crinoids, suggesting a zooplanktic diet. Forms with a U‐shaped body chamber (ancylocone) are regarded as suspension feeders, whereas orthoconic forms additionally might have consumed benthic prey. Heteromorphs could achieve near‐neutral buoyancy regardless of conch shape or ontogeny. Orthoconic heteromorphs likely had a vertical orientation, whereas ancylocone heteromorphs had a near‐horizontal aperture pointing upwards. Heteromorphs with a U‐shaped body chamber are more stable hydrodynamically than modern Nautilus and were unable substantially to modify their orientation by active locomotion, i.e. they had no or limited access to benthic prey at adulthood. Pathologies reported for heteromorphs were likely inflicted by crustaceans, fish, marine reptiles, and other cephalopods. Pathologies on Ptychoceras corroborates an external shell and rejects the endocochleate hypothesis. Devonian, Triassic, and Jurassic heteromorphs had a preference for deep‐subtidal to offshore facies but are rare in shallow‐subtidal, slope, and bathyal facies. Early Cretaceous heteromorphs preferred deep‐subtidal to bathyal facies. Late Cretaceous heteromorphs are common in shallow‐subtidal to offshore facies. Oxygen isotope data suggest rapid growth and a demersal habitat for adult Discoscaphites and Baculites. A benthic embryonic stage, planktic hatchlings, and a habitat change after one whorl is proposed for Hoploscaphites. Carbon isotope data indicate that some Baculites lived throughout their lives at cold seeps. Adaptation to a planktic life habit potentially drove selection towards smaller hatchlings, implying high fecundity and an ecological role of the hatchlings as micro‐ and mesoplankton. The Chicxulub impact at the Cretaceous/Paleogene (K/Pg) boundary 66 million years ago is the likely trigger for the extinct...

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“…Equally interesting is the fact that there are other locations around the periphery of the Mississippi Embayment, particularly on its eastern side, at which an End-Cretaceous impact signature is also missing and at which a Danian age erosional surface has been identified [83][84][85][86]. In addition, the Cretaceous-Paleogene sequence in New Jersey also contains evidence of hiatuses in the Danian [55,56,87]. We suggest that some Mississippi Embayment occurrences, and possibly one or more of those in New Jersey also, are linked in the sense that they were produced by the same sequence stratigraphic erosive event.…”

Section: Sea Level Changementioning

confidence: 99%

Cretaceous-Paleogene Dinoflagellate Biostratigraphy and the Age of the Clayton Formation, Southeastern Missouri, USA

2014

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Sedimentary deposits in Stoddard County, southeastern Missouri, reveal a K-Pg transition sequence represented by the uppermost Maastrichtian Owl Creek Formation and the Paleocene Clayton Formation. The Clayton Formation is characterized by a basal fossiliferous coquinite that contains reworked late Maastrichtian macrofossils. Dinoflagellate biostratigraphy is used to determine the age of the coquinite layer and specifically whether or not it is an end-K tsunamite deposit resulting from the Chicxulub impact event. Results indicate a mixed assemblage of late Maastrichtian and early Danian dinocysts within the basal coquinite of the Clayton Formation. Maastrichtian dinocyst taxa identified are Riculacysta amplexa, Pierceites pentagonus, Phelodinium tricuspe and Dinogymnium sp. and dinocysts utilized as global indicators of the basal Danian, also present in the coquinite, consist of Senoniasphaera inornata, Carpatella cornuta, Damassadinium californicum, and Lanternosphaeridium reinhardtii. A gray mud occurring above the coquinite in the middle of the Clayton Formation contains the mid-Danian dinoflagellate Senegalinium iterlaaense. Collectively, these data suggest that the coquinite was deposited well after the K-Pg event but before the middle Danian. The mixed assemblage of Late Cretaceous and Paleocene dinocysts preserved in the coquinite weakens the hypothesis that it is an end-K tsunamite deposit and suggests instead that it may result from a long-term transgressive lag. We also extend the stratigraphic range of the Paleocene Senegalinium simplex downward into the uppermost Maastrichtian. OPEN ACCESSGeosciences 2014, 4 2

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Cephalopods From the Cretaceous/Tertiary Boundary Interval on the Atlantic Coastal Plain, With a Description of the Highest Ammonite Zones in North America. Part Iii. Manasquan River Basin, Monmouth County, New Jersey

Abstract: BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Cited by 42 publications

References 115 publications

Scaphites of the “Nodosus Group” from the Upper Cretaceous (Campanian) of the Western Interior of North America

Scaphites of the “Nodosus Group” from the Upper Cretaceous (Campanian) of the Western Interior of North America

Recent advances in heteromorph ammonoid palaeobiology

Cretaceous-Paleogene Dinoflagellate Biostratigraphy and the Age of the Clayton Formation, Southeastern Missouri, USA

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