An Appalachian population of neochoristoderes (Diapsida, Choristodera) elucidated using fossil evidence and ecological niche modelling

  title={An Appalachian population of neochoristoderes (Diapsida, Choristodera) elucidated using fossil evidence and ecological niche modelling},
  author={Thomas W. Dudgeon and Zoe Landry and Wayne R. Callahan and Carl Mehling and Steven Ballwanz},
Four neochoristoderan vertebral centra are described from the latest Cretaceous of New Jersey, USA. One specimen was recovered from the basal transgressive lag of the Navesink Formation in the area of Holmdel, New Jersey, and two others were recovered nearby and probably were derived from the same horizon. The fourth was recovered from the Marshalltown sequence in the vicinity of the Ellisdale Dinosaur Site. These vertebrae expand the geographical range of Late Cretaceous neochoristoderes in… 


New records of theropods from the latest Cretaceous of New Jersey and the Maastrichtian Appalachian fauna
  • C. Brownstein
  • Geography, Environmental Science
    Royal Society Open Science
  • 2019
Two theropod teeth from the Mount Laurel Formation are reported, one of which resembles the dentition of the tyrannosauroid Dryptosaurus aquilunguis among latest Cretaceous forms in being heavily mediolaterally compressed and showing many moderately developed enamel crenulations, and increases the diversity of the Maastrichtian dinosaur fauna of Appalachia.
Choristoderes and the freshwater assemblages of Laurasia
The gavial-like neochoristodere Champsosaurus is the most familiar taxon, characterised by large size, a long rostrum and flared temporal fenestrae, but research over the last three decades has revealed many new genera and exposed an unexpected diversity.
Late Cretaceous dinosaurs in eastern USA—A taphonomic and biogeographic model of occurrences.
The eastern Coastal Plains of the USA contain a Late Cretaceous dinosaur assemblage of limited taxic diversity, but with wide distribution and reasonably good abundance. The ages of specimens range
The first reported ceratopsid dinosaur from eastern North America (Owl Creek Formation, Upper Cretaceous, Mississippi, USA)
It is hypothesize that the age of the fossil is consistent with a dispersal of ceratopsids into eastern North America during the very latest Cretaceous, presumably after the two halves of North America were reunited following the retreat of the Western Interior Seaway.
A fossil champsosaur population from the high Arctic: Implications for Late Cretaceous paleotemperatures
Additions to the Ammonite Fauna of the Upper Cretaceous Navesink Formation of New Jersey
These phosphatic beds represent a condensed sequence that spans the late Campanian to early Maastrichtian, as the youngest ammonite known from the Navesink Formation, Discoscaphites gulosus, indicates a correlation with the Hoploscaphite nicolletii or Jeletzkytes nebrascensis zone of the Western Interior.
Alphadon (Marsupialia) and Multituberculata (Allotheria) in the Cretaceous of eastern North America
ABSTRACT Discoveries at the Ellisdale Site (Campanian, Marshalltown Formation) in New Jersey add significantly to knowledge of vertebrate microfaunas east of the Cretaceous Interior Seaway. Lizard
Sexual dimorphism in Champsosaurus (Diapsida, Choristodera)
The observed morphologic variations are hypothesized to reflect sexual dimorphism rather than sympatry of species, and no significant variations of humeral and femoral morphologies occur in small champsosaur specimens, suggesting an aquatic niche for juveniles like adult males.
A history of an extinct reptilian clade, the Choristodera: longevity, Lazarus-Taxa, and the fossil record
A well-developed clade phylogeny can predict the minimal number of missing taxa in the early history of a clade and can contribute to the understanding of clade diversity through time.