scholarly journals First remains of the enormous alligatoroid Deinosuchus from the Upper Cretaceous Menefee Formation, New Mexico

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e11302
Author(s):  
Benjamin F. Mohler ◽  
Andrew T. McDonald ◽  
Douglas G. Wolfe

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.


PLoS ONE ◽  
2014 ◽  
Vol 9 (9) ◽  
pp. e108804 ◽  
Author(s):  
Victoria M. Arbour ◽  
Michael E. Burns ◽  
Robert M. Sullivan ◽  
Spencer G. Lucas ◽  
Amanda K. Cantrell ◽  
...  


PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e11084 ◽  
Author(s):  
Andrew T. McDonald ◽  
Douglas G. Wolfe ◽  
Elizabeth A. Freedman Fowler ◽  
Terry A. Gates

Brachylophosaurini is a clade of hadrosaurid dinosaurs from the Campanian of western North America. Although well-known from northern localities in Montana and Alberta, including abundant material of Brachylophosaurus canadensis and Maiasaura peeblesorum and the holotypes of Acristavus gagslarsoni and Probrachylophosaurus bergei, material from southern localities in Utah and Colorado is restricted to a partial skull referred to A. gagslarsoni and several indeterminate specimens. Here we describe Ornatops incantatus gen. et sp. nov., a new brachylophosaurin known from a partial skeleton from the Allison Member of the Menefee Formation in New Mexico. Ornatops is the first brachylophosaurin reported from New Mexico and the southernmost occurrence of the clade. Ornatops shares with Probrachylophosaurus and Brachylophosaurus a caudally expanded nasofrontal suture on the frontals, but also exhibits an autapomorphic nasofrontal suture morphology, with a horizontal rostral region and elevated caudal region with two prominent parasagittal bumps, which is different from other brachylophosaurin specimens, including juvenile and adult Brachylophosaurus. A phylogenetic analysis places Ornatops in a trichotomy with Probrachylophosaurus and Brachylophosaurus, with Maiasaura and Acristavus as successive outgroups.



2019 ◽  
Author(s):  
Kara A. Kelley ◽  
◽  
Charlotte J.H. Hohman ◽  
Andrew T. McDonald ◽  
Douglas G. Wolfe


PalZ ◽  
2021 ◽  
Author(s):  
Sebastian G. Dalman ◽  
Spencer G. Lucas ◽  
Steven E. Jasinski ◽  
Asher J. Lichtig ◽  
Peter Dodson
Keyword(s):  


2018 ◽  
Vol 93 (2) ◽  
pp. 278-290
Author(s):  
J. Mark Erickson

AbstractIn 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



2000 ◽  
Vol 3306 ◽  
pp. 1-30 ◽  
Author(s):  
W. J. KENNEDY ◽  
N. H. LANDMAN ◽  
W. A. COBBAN ◽  
R. O. JOHNSON
Keyword(s):  


Author(s):  

Abstract A new distribution map is provided for Otiorhynchus meridionalis Gyllenhal. Coleoptera: Curculionidae. Hosts: strawberry (Fragaria ananassa) and apple (Malus domestica). Information is given on the geographical distribution in Europe (France, Germany, Italy (Sicily), Netherlands, Spain), North America (USA (California, Colorado, Idaho, Montana, Nevada, New Mexico, Utah, Washington)).



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