.... The Wayan femur lacks an autapomorphy diagnostic for Moros intrepidus , indicating the presence of a previously unrecognized tyrannosauroid taxon in the early Late Cretaceous of Laramidia. Histological results indicate that, at the time of death, this individual was at least five years old, skeletally...

...Thomas R. Holtz, Jr. Well-sampled dinosaur communities from the Jurassic through the early Late Cretaceous show greater taxonomic diversity among larger (>50 kg) theropod taxa than communities of the Campano-Maastrichtian, particularly to those of eastern/central Asia and Laramidia. The large...

...Fig. 1. Locality map of Nasutoceratopsini from northern Laramidia. CMN 8804 is from the upper unit (1) of the Oldman Formation of southern Alberta. ANSP 15800 (the holotype of Avaceratops ) is from the Careless Creek bonebed near the base of the McClelland Member of the Judith River Formation...

...Steven L. Wick The Lowerverse local fauna of West Texas, USA, preserves a rare, early Campanian assemblage of microvertebrates from Laramidia. The recovery of 137 fragmentary specimens reveals that albanerpetontids were locally abundant here and also widespread throughout much of the Western...

... is problematic from the perspective of palaeoecological reconstructions. This is precisely where the palaeocoastline of Laramidia persisted the longest during the late Campanian stage, despite minor fluctuations in sea level, until the onset of the Bearpaw marine transgression ( Eberth and Hamblin 1993...

.... The Western Interior Seaway (WIS) opened to the Gulf of Mexico and the Arctic Ocean in the mid-Cenomanian, effectively preventing biogeographic exchange between the eastern and western North American landmasses of Appalachia and Laramidia, respectively, for much of the Late Cretaceous ( Fig. 1 ; Slattery et...

... de vérifier les nouvelles reconstitutions présentées ici. [Traduit par la Rédaction] Ceratopsids are a diverse group of megaherbivorous dinosaurs that inhabited the Late Cretaceous (Campanian–Maastrichtian) microcontinent of Laramidia (now western North America) and, to a much lesser...

... ” by Brett-Surman (1989) . Here we formally describe and figure these associated skeletons and several other relevant isolated specimens and place them into a phylogenetic context for the first time. This material, as the oldest associated skeletons of hadrosaurids from Laramidia and among the oldest...

... isolated from Laramidia since the Albian–Cenomanian (e.g., Roberts and Kirschbaum, 1995 ; Russell, 1995 ; Schwimmer, 2002 ). However, it is notable that the theropod assemblage from Ellisdale does not resemble that of the Cenomanian Wayan Formation of the northern Rockies, the latter including...

... present in this region of North America were of a more primitive evolutionary state compared with faunas in the western portion of the continent (i.e., Laramidia) ( Schwimmer 1997 ; Carr et al. 2005 ; Prieto-Márquez et al. 2016 a ; Brownstein 2018 , 2021 ). This phenomenon has provided the foundation...

... Crétacé dinosaures Maiasaurini (originally Maiasaurinae, Horner 1992 ; =Brachylophosaurini, Gates et al. 2011 ) are recognized as the earliest-diverging clade of hadrosaurines present in Laramidia, and include both solid-crested and non-crested species ( Gates et al. 2011 ; Xing et al. 2017...

... was partially to completely flooded from the Albian through the Late Cretaceous, forming two separate continental-scale landmasses that have been referred to as Appalachia to the east and Laramidia to the west [ 55 , 56 ]. During times when the seaway was at its greatest extent, the primary APG was transported...

...Fig. 7. Photographs of three chasmosaurine skulls from the late Campanian of Laramidia. (A) Left side of skull of UALVP 40 in oblique dorsolateral view, showing proposed new diagnostic feature for Chasmosaurus . White double-headed arrows parallel the straight dorsal border of the squamosal...

... studies of collections from the latest Cretaceous of Laramidia may reveal more, currently unrecognized taxa. The ZooBank LSID for this publication is urn:lsid:zoobank.org:pub:B9267D1C-BFE5-45D6-85B4-2A74958D40D1. The generic name refers to the Canadian province of Alberta, combined...

... vertebrates from southern Laramidia : Palaeogeography, Palaeoclimatology, Palaeoecology , v. 591 , https://doi.org/10.1016/j.palaeo.2022.110876 . Cifelli , R.L. , Kirkland , J.I. , Weil , A. , Deino , A.L. , and Kowallis , B.J. , 1997 , High-precision 40 Ar/ 39 Ar geochronology...

... a major component of the Late Cretaceous terrestrial fauna of Laramidia ( Sampson and Loewen 2010 ). Arrhinoceratops brachyops is among the more poorly understood members of the clade, known from just the holotype skull (ROM 796), which was collected from the upper Campanian – lower Maastrichtian...

... ( Paulina-Carabajal and Succar 2014 ), Gorgosaurus (TMP 94.12.602), Murusraptor ( Coria and Currie 2016 ), and Sinraptor ( Currie and Zhao 1993 a ). endocast inner ear pneumaticity Late Cretaceous Campanian Alberta Laramidia endocaste oreille interne pneumaticité Crétacé tardif...

.... 1251 – 1262 . Ryan M.J. , Evans D.C. , Currie P.J. , and Loewen M.A. , 2014 , A new chasmosaurine from northern Laramidia expands frill disparity in ceratopsid dinosaurs : Naturwissenschaften , v. 101 , p. 505 – 512 . Ryan M.J. , Holmes R...