Article
Geology
Hans-Dieter Sues, David C. Evans, Peter M. Galton, Caleb M. Brown
Summary: This article provides a detailed anatomical description of the holotype of Parksosaurus warreni, including photographs of the skeleton. It highlights the functional role of the tail and its stabilizing function during locomotion. The new anatomical information allows for more detailed comparisons to closely related taxa and further discussions on the interrelationships of neornithischian dinosaurs.
CRETACEOUS RESEARCH
(2023)
Article
Paleontology
John R. Horner, Mark B. Goodwin, David C. Evans
Summary: This study reports a new pachycephalosaurid fossil named Platytholus clemensi. The unique skull features and size classify it as a new taxon within the Pachycephalosaurinae subfamily. The study also reveals the internal vascular organization and potential keratinous structure of the fossil.
JOURNAL OF VERTEBRATE PALEONTOLOGY
(2022)
Article
Multidisciplinary Sciences
Benjamin T. Breeden, Thomas J. Raven, Richard J. Butler, Timothy B. Rowe, Susannah C. R. Maidment
Summary: Armoured dinosaurs, Thyreophora, were a diverse group of ornithischians from the Early Jurassic to the end of the Cretaceous, evolving large body size and complex chewing mechanisms. Scutellosaurus lawleri, the earliest diverging thyreophoran known from the Lower Jurassic of Arizona, provides important insights into the early evolution of armoured dinosaurs, but has received limited study. The bone structure of Scutellosaurus lawleri suggests slow growth and lower metabolic rates compared to other ornithischian dinosaurs, indicating potential environmental variation in Early Jurassic dinosaur faunas.
ROYAL SOCIETY OPEN SCIENCE
(2021)
Article
Evolutionary Biology
Stuart Pond, Sarah-Jane Strachan, Thomas J. Raven, Martin I. Simpson, Kirsty Morgan, Susannah C. R. Maidment
Summary: The Wealden Group in southern England is a deposition of rivers, floodplains, and lagoons during the Early Cretaceous. Two historically important ankylosaurs, Polacanthus and Hylaeosaurus, have been found in its deposits. A new genus and species of ankylosaur, Vectipelta barretti, were discovered in the Wessex Formation of the Isle of Wight, which suggests a complex pattern of faunal turnover in the Wealden Group. Vectipelta is not closely related to other known Wealden taxa but instead shares a clade with two Chinese ankylosaurs, indicating a complex pattern of dispersal during the Early Cretaceous.
JOURNAL OF SYSTEMATIC PALAEONTOLOGY
(2023)
Article
Paleontology
Ronald S. Tykoski, Dori L. Contreras, Christopher Noto
Summary: The sediments of the Woodbine Group in northeastern Texas were deposited along the southwestern margin of Appalachia during a regression of the Western Interior Seaway. A new small-bodied ornithopod dinosaur, Ampelognathus coheni, has been discovered in the Lewisville Formation of north Texas, which is known for preserving a diverse terrestrial fossil record. This discovery fills in a previously missing component of the Cretaceous terrestrial fauna in southwestern Appalachia. The study highlights the importance of the Lewisville Formation in understanding the transitional period in the earliest Late Cretaceous in eastern North America.
JOURNAL OF VERTEBRATE PALEONTOLOGY
(2023)
Article
Paleontology
Rachel E. Nottrodt
Summary: This study describes the first diagnostic ornithomimid fossils from the upper Maastrichtian Scollard Formation in Alberta, Canada. These fossils provide new information about the taxonomic composition of North American ornithomimids during the late Maastrichtian. The specimens extend the stratigraphic ranges of both Ornithomimus and Struthiomimus and highlight the need for a review of North American ornithomimid taxonomy.
JOURNAL OF VERTEBRATE PALEONTOLOGY
(2022)
Article
Geosciences, Multidisciplinary
James R. Bonelli, Peter P. Flaig
Summary: This study employs quantitative biofacies analysis to explore the spatio-temporal variability in palynomorph and microbiota assemblages from nine paleosol horizons along the Colville River, North Slope, Alaska. Results reveal five biofacies and two assemblage types, providing insight into paleoenvironmental controls on the coastal plain ecosystem.
Article
Geology
J. Garcia-Cobena, F. J. Verdu, A. Cobos
Summary: The El Castellar Formation in the Maestrazgo Basin of Spain represents the beginning of Lower Cretaceous sedimentation and contains sedimentary layers of shales, evaporites, sandstones, limestones, and marlstones deposited in coastal wetland systems. Although dinosaur fossils in this formation are fragmentary and scarce, the osteological record shows a high diversity of dinosaurs. This study focuses on examining vertebral remains of a large ornithopod styracosternan, which is closely related to Iguanodon galvensis from the late Hauterivian-early Barremian.
JOURNAL OF IBERIAN GEOLOGY
(2023)
Article
Paleontology
Jorge G. Meso, Christophe Hendrickx, Mattia A. Baiano, Juan Canale, Leonardo Salgado, Ignacio Diaz-Martinez
Summary: The study describes theropod shed teeth associated with a titanosaur sauropod skeleton in Rio Negro, Argentina. Through cladistic and dental measurement data analyses, three dental morphotypes confidently identified as abelisaurid theropods.
ACTA PALAEONTOLOGICA POLONICA
(2021)
Article
Paleontology
Nickolas A. Brand, Andrew B. Heckert, Israel Sanchez, John R. Foster, Rebecca K. Hunt-Foster, Jaelyn J. Eberle
Summary: We describe a microvertebrate assemblage from the J&M site, consisting of new taxa of sharks, rays, osteichthyans, and land animals. The discovery of marine-associated taxa suggests the influence of marine or estuarine environments at the J&M site. The presence of mammalian taxa suggests a Judithian-Lancian age for the site.
ACTA PALAEONTOLOGICA POLONICA
(2022)
Article
Geosciences, Multidisciplinary
Kate Andrzejewski, Greg Ludvigson, Marina Suarez, Paul Mccarthy, Peter Flaig
Summary: This study reports the stable isotope compositions of Arctic paleoprecipitation during the Late Cretaceous based on analysis of geological samples from northern Alaska. The findings confirm the presence of a deuterium excess in Arctic paleoprecipitation during this period and provide new insights into possible explanations for this phenomenon.
Article
Paleontology
Hai Xing, Wei Gu, Shulin Hai, Tingxiang Yu, Dong Han, Yuguang Zhang, Shujun Zhang
Summary: This study reevaluates the osteology and taxonomy of the lambeosaurine Sahaliyania elunchunorum, suggesting that it should be considered a junior synonym of Amurosaurus riabinini. Additionally, fibulae specimens from the Wulaga bonebed show adult stage characteristics with moderate remodeling by dense secondary osteons. Phylogenetic analysis indicates a sister-taxon relationship between Amurosaurus and Lambeosaurus in the Lambeosaurinae group.
JOURNAL OF VERTEBRATE PALEONTOLOGY
(2021)
Article
Paleontology
Ruairidh J. Duncan, Alistair R. Evans, Patricia Vickers-Rich, Thomas H. Rich, Stephen F. Poropat
Summary: Ornithopod dinosaur fossils are relatively common in the Cretaceous of Australia's state of Victoria. Researchers have found nine dentulous ornithopod elements in the Eumeralla Formation and revised the classifications of Leaellynasaura and Atlascopcosaurus. The discovery of cf. Galleonosaurus in the Eumeralla Formation suggests environmental stability in southeast Australia from the Barremian to the Albian stages of the Early Cretaceous.
JOURNAL OF VERTEBRATE PALEONTOLOGY
(2021)
Article
Multidisciplinary Sciences
Ariana Paulina-Carabajal, Francisco T. Barrios, Ariel H. Mendez, Ignacio A. Cerda, Yuong-Nam Lee
Summary: Recent discoveries in southern South America have improved the Late Cretaceous dinosaur record, with findings from Chorrillo and Cerro Fortaleza formations adding ankylosaur remains to the previously recorded dinosaur fauna. A site in Cerro Fortaleza Formation yielded isolated teeth and osteoderms from Abelisauridae, Titanosauria, Nodosauridae, and Peirosauridae, providing valuable information on the biodiversity of the region during the Campanian-Maastrichtian age. This site also marks the first record of ankylosaurs and the most southerly record of Peirosauridae in South America.
Article
Geosciences, Multidisciplinary
Kousuke Tsujimura, Makoto Manabe, Yumiko Chiba, Takanobu Tsuihiji
Summary: Isolated metatarsals III and IV of a caenagnathid theropod likely referable to Anzu wyliei were described from the Hell Creek Formation in northwestern South Dakota. These bones, missing from the holotype, provide further anatomical information on this well-known species of Caenagnathidae, highlighting the importance of isolated or fragmentary specimens found in multitaxic bone beds.
CANADIAN JOURNAL OF EARTH SCIENCES
(2021)
Article
Anatomy & Morphology
Caleb Marshall Brown, Collin S. VanBuren, Derek W. Larson, Kirstin S. Brink, Nicolas E. Campione, Matthew J. Vavrek, David C. Evans
JOURNAL OF ANATOMY
(2015)
Letter
Biology
Caleb Marshall Brown, Nicolas E. Campione, Henrique Correa Giacomini, Lorna J. O'Brien, Matthew J. Vavrek, David C. Evans
Article
Geology
Michael J. Ryan, David C. Evans, Philip J. Currie, Caleb M. Brown, Don Brinkman
CRETACEOUS RESEARCH
(2012)
Article
Paleontology
Caleb Marshall Brown, David C. Evans, Michael J. Ryan, Anthony P. Russell
JOURNAL OF VERTEBRATE PALEONTOLOGY
(2013)
Article
Geography, Physical
Caleb Marshall Brown, David C. Evans, Nicolas E. Campione, Lorna J. O'Brien, David A. Eberth
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2013)
Article
Multidisciplinary Sciences
Ryan K. Schott, David C. Evans, Mark B. Goodwin, John R. Horner, Caleb Marshall Brown, Nicholas R. Longrich
Article
Multidisciplinary Sciences
Caleb Marshall Brown, Anthony P. Russell
Article
Evolutionary Biology
Caleb Marshall Brown, Jessica H. Arbour, Donald A. Jackson
SYSTEMATIC BIOLOGY
(2012)
Article
Multidisciplinary Sciences
David C. Evans, Ryan K. Schott, Derek W. Larson, Caleb M. Brown, Michael J. Ryan
NATURE COMMUNICATIONS
(2013)
Article
Ecology
Jessica H. Arbour, Caleb M. Brown
METHODS IN ECOLOGY AND EVOLUTION
(2014)
Article
Biodiversity Conservation
Caleb M. Brown, Philip J. Currie, Francois Therrien
Summary: Intraspecific aggression is crucial for understanding animal behavioral ecology and reproductive systems, but difficult to document in extinct taxa. Through studying intraspecific facial bite lesions in tyrannosaurid specimens, it was found that this behavior may be associated with the onset of sexual maturity and potentially represent a plesiomorphic behavior in archosaurs.
Article
Biodiversity Conservation
Caleb M. Brown, Nicolas E. Campione, Gregory P. Wilson Mantilla, David C. Evans
Summary: Research shows that small-bodied dinosaurs and mammals in the Hell Creek and Lance Formations are less complete, less likely to be articulated, and described later compared to their large-bodied counterparts. The abundance of family-level taxa is strongly tied to body mass, and the relative abundance of juveniles of large-bodied taxa is also underrepresented, potentially impacting our understanding of speciation and extinction dynamics across the K/Pg boundary.
Editorial Material
Multidisciplinary Sciences
Roger B. J. Benson, Caleb M. Brown, Nicolas E. Campione, Thomas M. Cullen, David C. Evans, Lindsay E. Zanno
Summary: Schroeder et al. reported a size gap among predatory dinosaur species, but they argue that it may only be present in Late Cretaceous North America, and not in other time periods or geographic regions. They suggest a broader consideration of this hypothesis, with a quantitative evaluation of preservation and dataset biases.
Review
Biology
Thomas M. Cullen, Caleb M. Brown, Kentaro Chiba, Kirstin S. Brink, Peter J. Makovicky, David C. Evans
Summary: Osteohistological data are commonly used to study the life history of tetrapods, focusing on assessing ontogenetic stage and relative growth. While these methods have become a common component of taxonomic description of new fossil taxa, more consideration is needed for sources of variation and dimensional scaling relationships among different osteohistological measurements.