First report of a giant neosuchian (Crocodyliformes) in the Williams Fork Formation (Upper Cretaceous: Campanian) of Colorado

Foster, John; Hunt-Foster, ReBecca

doi:10.1016/j.cretres.2015.02.003

Cited by 8 publications

(18 citation statements)

References 46 publications

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“…Though osteoderm morphology appears to be sufficient for assignment of neosuchian material to Deinosuchus, it is important to consider cases where assignment was unclear or has since been disputed. Foster & Hunt-Foster (2015) reported a neosuchian osteoderm from the Williams Fork Formation of Colorado, at around 74.6-72.7 Ma (Fowler, 2017). This specimen, MWC 8240, is a large osteoderm resembling those of Deinosuchus in its deep pitting, but atypical in that it is not inflated and appears to be more subrectangular.…”

Section: Discussionmentioning

confidence: 96%

“…Osteoderms morphologically similar to MWC 8240 but smaller in size are abundant in the Williams Fork Formation (Foster & Hunt-Foster, 2015), indicating an abundance of this morph as juveniles, or perhaps that few adults achieved maximum size. Whether this represents a new species of Deinosuchus or a separate genus of neosuchian is unclear, and therefore a diagnosis beyond Neosuchia was not made (Foster & Hunt-Foster, 2015).…”

Section: Discussionmentioning

confidence: 99%

“…This specimen, UW 16040, is an osteoderm of similar construction to MWC 8240 in that it displays deep pitting and large size typical of Deinosuchus, but differs from Deinosuchus in its subrectangular shape and thin cross-section. Wahl & Hogbin (2003) argued that the thin cross-section is a taphonomic artefact resulting from erosion of the ventral surface, though Foster & Hunt-Foster (2015) considered this unlikely.…”

Section: Discussionmentioning

confidence: 99%

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First remains of the enormous alligatoroidDeinosuchusfrom the Upper Cretaceous Menefee Formation, New Mexico

Mohler

McDonald²,

Wolfe³

2021

PeerJ

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The neosuchian Deinosuchus is known from numerous localities throughout the Campanian of North America, from New Jersey to Montana (USA) and as far south as Coahuila (Mexico). Here we describe six osteoderms, two vertebrae, and a partial tooth discovered in the Menefee Formation of New Mexico and assign them to Deinosuchus sp., representing one of the earliest occurrences of this genus on the Laramidian subcontinent, and among the earliest known occurrences of this large alligatoroid in all of North America. The osteoderms are morphologically distinct in their inflated construction, with deep and radially distributed pitting, which closely matches osteoderms of Deinosuchus.

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Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

First remains of the enormous alligatoroidDeinosuchusfrom the Upper Cretaceous Menefee Formation, New Mexico

Mohler

McDonald²,

Wolfe³

2021

PeerJ

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show abstract

“…This specimen, MWC 8240, is a large osteoderm resembling those of Deinosuchus in its deep pitting, but atypical in that it is not inflated and appears to be more subrectangular. Osteoderms morphologically similar to MWC but smaller in size are abundant in the Williams Fork Formation (Foster & Hunt-Foster, 2015), indicating an abundance of this morph as juveniles, or perhaps that few adults achieved maximum size. Whether this represents a new species of Deinosuchus or a separate genus of neosuchian is unclear, and therefore a diagnosis beyond Neosuchia was not made (Foster & Hunt-Foster, 2015).…”

Section: Discussionmentioning

confidence: 99%

Peer Review #2 of "First remains of the enormous alligatoroid Deinosuchus from the Upper Cretaceous Menefee Formation, New Mexico (v0.1)"

Schwimmer¹

2021

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“…from the late Cretaceous Blackhawk Formation in the southern Wasatch Plateau in southern Utah, and Richardson (1909) reported on the occurrence of Geinitzia reichenbachii near Thompson, Utah in the Late Cretaceous Farrer Formation. Both units are relatively correlative to the Williams Fork Formation, Mesaverde Group in northeastern Utah(Foster and Hunt-Foster, 2015).…”

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confidence: 90%

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Supplemental Information 1: Slab Containing Fossils With Affinity to Geinitzia From the Late Cretaceous Williams Fork Fo

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In this paper we describe fossil conifer branches discovered in the Mesaverde Group, Williams Fork Formation in northeastern Utah, along Snake John Reef. Fossil conifers from the Campanian of northeastern Utah have not been previously studied, despite their common occurrence in the formation. The recovered fossils closely resemble Geinitzia known from the late Cretaceous of Europe, with several previous reported occurrences in North America, including New Jersey and Southern Utah. The fossils share morphological characteristics with Geinitzia, exhibiting short spirally arranged thin needles, with appressed scale-like leaves along the shoots. They differ from Araucarites in that the appressed needles are more scale like and smaller, and differ from the members of the modern Araucariaceae in lacking broad bases to the needles, although the fossils resemble the modern species Araucaria heterophylla (Norfolk Island Pine) native to the South Pacific. The observed branching pattern in the fossil reflects similarities found in the Cupressaceae Family, and Geinitzia may be regarded as an early member of this group, or having an affinity to fossil Araucariaceae conifers, which despite having a modern southern hemisphere geographic distribution today were widespread during the late Mesozoic, extending across North America and Europe.

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First report of a giant neosuchian (Crocodyliformes) in the Williams Fork Formation (Upper Cretaceous: Campanian) of Colorado

Cited by 8 publications

References 46 publications

First remains of the enormous alligatoroidDeinosuchusfrom the Upper Cretaceous Menefee Formation, New Mexico

First remains of the enormous alligatoroidDeinosuchusfrom the Upper Cretaceous Menefee Formation, New Mexico

Peer Review #2 of "First remains of the enormous alligatoroid Deinosuchus from the Upper Cretaceous Menefee Formation, New Mexico (v0.1)"

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