Peter J Makovicky

Peter J Makovicky
Field Museum of Natural History · Dept. of Geology

About

126
Publications
63,117
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
5,463
Citations

Publications

Publications (126)
Article
Giant carnivorous dinosaurs such as Tyrannosaurus rex and abelisaurids are characterized by highly reduced forelimbs that stand in contrast to their huge dimensions, massive skulls, and obligate bipedalism.¹,² Another group that follows this pattern, yet is still poorly known, is the Carcharodontosauridae: dominant predators that inhabited most con...
Article
Although intensified work on the volcaniclastic-rich sediments of the fossil-bearing Mussentuchit Member (uppermost Cedar Mountain Formation, Utah) has provided a refined chronostratigraphic framework, paleoenvironmental interpretations remain cryptic. To resolve this, we performed facies analysis and architectural reconstruction on exposed Mussent...
Article
Full-text available
Temnospondyl amphibians are common in non-marine Triassic assemblages, including in the Fremouw Formation (Lower to Middle Triassic) of Antarctica. Temnospondyls were among the first tetrapods to be collected from Antarctica, but their record from the lower Fremouw Formation has long been tenuous. One taxon, ‘ Austrobrachyops jenseni ,’ is represen...
Article
Osteohistological data are commonly used to study the life history of extant and extinct tetrapods. While recent advances have permitted detailed reconstructions of growth patterns, physiology and other features using these data, they are most commonly used in assessments of ontogenetic stage and relative growth in extinct animals. These methods ha...
Article
The independent evolution of gigantism among dinosaurs has been a topic of long-standing interest, but it remains unclear if gigantic theropods, the largest bipeds in the fossil record, all achieved massive sizes in the same manner, or through different strategies. We perform multi-element histological analyses on a phylogenetically broad dataset s...
Article
A kannemeyeriiform dicynodont is described on the basis of an occipital plate from the upper Fremouw Formation (Middle Triassic) Gordon Valley locality in the Beardmore Glacier region of Antarctica. The Antarctic specimen is comparable in size to Kannemeyeria simocephalus from the well-known Cynognathus Assemblage Zone of the Beaufort Group of Sout...
Article
Despite reports of sexual dimorphism in extinct taxa, such claims in non-avian dinosaurs have been rare over the last decade and have often been criticized. Since dimorphism is widespread in sexually reproducing organisms today, under-reporting in the literature might suggest either methodological shortcomings or that this diverse group exhibited h...
Article
Full-text available
Despite reports of sexual dimorphism in extinct taxa, such claims in non-avian dinosaurs have been rare over the last decade and have often been criticized. Since dimorphism is widespread in sexually reproducing organisms today, under-reporting in the literature might suggest either methodological shortcomings or that this diverse group exhibited h...
Chapter
Full-text available
New and important pennaraptoran specimens continue to be discovered on a regular basis. Yet, with these discoveries the number of viable phylogenetic hypotheses has increased, including ones that challenge the traditional grouping of dromaeosaurids and troodontids within a monophyletic Deinonychosauria. This chapter will cover recent efforts to add...
Chapter
Full-text available
An unabated surge of new and important discoveries continues to transform knowledge of pen-naraptoran biology and evolution amassed over the last 150+ years. This chapter summarizes progress made thus far in sampling the pennaraptoran fossil record of the Mesozoic and Paleocene and proposes priority areas of attention moving forward. Oviraptorosaur...
Article
Full-text available
The fossil record provides compelling examples of heterochrony at macroevolutionary scales such as the peramorphic giant antlers of the Irish elk. Heterochrony has also been invoked in the evolution of the distinctive cranial frill of ceratopsian dinosaurs such as Triceratops. Although ceratopsian frills vary in size, shape, and ornamentation, quan...
Article
Full-text available
To date, eco-evolutionary dynamics in the ascent of tyrannosauroids to top predator roles have been obscured by a 70-million-year gap in the North American (NA) record. Here we report discovery of the oldest Cretaceous NA tyrannosauroid, extending the lineage by ~15 million years. The new taxon—Moros intrepidus gen. et sp. nov.—is represented by a...
Article
Full-text available
Cretaceous aquatic ecosystems were amazingly diverse, containing most clades of extant aquatic vertebrates as well as an array of sharks and rays not present today. Here we report on the chondrichthyan fauna from the late Maastrichtian site that yielded the Tyrannosaurus rex skeleton FMNH PF 2081 (“SUE”). Significant among the recovered fauna is an...
Article
Full-text available
The dental morphology and tooth replacement pattern of Liaoceratops yanzigouensis, the earliest known neoceratopsian, are important for our understanding of the evolution of the ceratopsian dental system. Here we describe the dental morphology and tooth replacement of Liaoceratops yanzigouensis based on high-resolution computed tomographic (CT) sca...
Article
Full-text available
Here we provide a detailed description of the postcranial skeleton of the holotype and referred specimens of Buitreraptor gonzalezorum . This taxon was recovered as an unenlagiine dromaeosaurid in several recent phylogenetic studies and is the best represented Gondwanan dromaeosaurid discovered to date. It was preliminarily described in a brief art...
Data
Strict consensus of the MPTs obtained from the phylogenetic analysis.
Data
Selected measurements of the postcranial bones of the holotype and referred specimens of Buitreraptor gonzalezorum.
Preprint
Full-text available
Here we provide a detailed description of the postcranial skeleton of the holotype and referred specimens of Buitreraptor gonzalezorum . This taxon was recovered as a unenlagiine dromaeosaurid in several recent phylogenetic studies and is the best represented Gondwanan dromaeosaurid discovered to date. It was preliminarily described in a brief arti...
Preprint
Full-text available
Here we provide a detailed description of the postcranial skeleton of the holotype and referred specimens of Buitreraptor gonzalezorum . This taxon was recovered as a unenlagiine dromaeosaurid in several recent phylogenetic studies and is the best represented Gondwanan dromaeosaurid discovered to date. It was preliminarily described in a brief arti...
Article
Full-text available
Background Eolambia caroljonesa is the most abundant dinosaur in the lower Cenomanian Mussentuchit Member of the Cedar Mountain Formation of Utah, and one of the most completely known non-hadrosaurid iguanodontians from North America. In addition to the large holotype and paratype partial skulls, copious remains of skeletally immature individuals,...
Data
Character list, list of supplemental references, and list of synapomorphies. List of morphological characters and supplemental references used in the phylogenetic analysis, and list of synapomorphies. (DOC)
Data
Nexus file formatted for TNT. Nexus file used in the phylogenetic analysis. (TXT)
Data
List of specimens examined. Iguanodontian specimens examined firsthand. (XLS)
Data
Table of measurements. Measurements of select anatomical features of FMNH PR 3847. (DOC)
Data
Data matrix. Character-taxon matrix used in the phylogenetic analysis. (XLS)
Article
Buitreraptor gonzalezorum is a paravian theropod from the Late Cretaceous of Patagonia that has been recovered as an unenlagiine dromaeosaurid in several phylogenies. It was preliminarily described in a brief article, but a detailed osteology has not been published to date. Here we provide a thorough osteological description of the skull of the hol...
Article
Full-text available
Background Late Cretaceous terrestrial strata of the Neuquén Basin, northern Patagonia, Argentina have yielded a rich fauna of dinosaurs and other vertebrates. The diversity of saurischian dinosaurs is particularly high, especially in the late Cenomanian-early Turonian Huincul Formation, which has yielded specimens of rebacchisaurid and titanosaur...
Data
Results of traditional PCA on log-transformed data from S7. (TIF)
Data
Data matrix of forelimb and femoral measurements used in pPCA/PCA analysis of theropod forelimb reduction patterns. (XLSX)
Data
Age ranges used to calibrate S3 File for pPCA. Text file with stratigraphic ranges for theropod taxa included in the pPCA analysis for calibrating the S3 File using STRAP [22]. (TXT)
Data
Data matrix used in PCO analysis of theropod forelimbs. (XLSX)
Data
Log-transformed measurements for forelimb elements and femur used in pPCA analyses. Table with log-transformed data formatted as text for pPCA analyses in R (see S5 File). (TXT)
Data
Forelimb characters employed in PCO analysis. List of forelimb characters taken from [7] with two new characters added and analyzed with Principal Coordinates analysis. (DOCX)
Data
Photographs of the discovery and initial excavation of the holotype of Gualicho shinyae. (Upper left) Akiko Shinya next to parts of pubis of the holotype immediately after her discovery of the specimen. (Upper right) Initial excavation of specimen. (Lower left) Articulated right foot of the holotype of Gualicho shinyae during excavation. (Lower rig...
Data
Taxon-character matrix modified from [7] with added characters and taxa. Matrix in TNT format modified from [7] with addition of Gualicho and Deltadromeus and nine new characters. (TNT)
Data
Script for conducting pPCA analysis using files S8-S10. (TXT)
Data
Taxon-character matrix modified from [11] with added characters and taxa. Matrix in TNT format modified from [11] with addition of Gualicho and four new characters. (TNT)
Data
Phylogenetic tree used for pPCA analysis of theropod forelimb reduction patterns. Nexus formatted tree file detailing relationships between the 60 taxa in the pPCA analyses. (TRE)
Data
TNT script for determining increase in tree length with addition of each taxon in a data set. Script containing TNT macro to be run after dataset is processed. (TXT)
Data
Decription of characters added and scorings changed in the two phylogenetic analyses. Description of new characters added to the phylogenetic analyses based on [7] and [11], and discussion and justification for re-scoring select character states in those data matrices. (DOCX)
Article
Full-text available
The partial skeleton of a leptoceratopsid dinosaur, Ischioceratops zhuchengensis gen. et sp. nov., was excavated from the bone-beds of the Upper Cretaceous Wangshi Group of Zhucheng, Shandong Province, China. This fossil represents the second leptoceratopsid dinosaur specimen recovered from the Kugou locality, a highly productive site in Zhucheng....
Data
Character list for analysis of ornithischian phylogenetic relationships. Table A. Codings for S1 phylogenetic analysis, in TNT format. (DOC)
Data
Character list for analysis of ceratopsian phylogenetic relationships. Table A. Codings for S3 phylogenetic analysis, in TNT format (DOC)
Article
Full-text available
Dinosauria;growth curves;life tables
Conference Paper
The Cedar Mountain Formation is comprised of five members spanning approximately 30 million years of dinosaur evolution in western North America. The sequence is of particular interest for bracketing the transition from Early to Late Cretaceous vertebrate faunas in the region and for refining the appearance of taxa with putative Asian affinities. R...
Article
Full-text available
Ecological divergence is thought to be coupled with evolutionary radiations, yet the strength of this coupling is unclear. When birds diversified ecologically has received much less attention than their hotly debated crown divergence time. Here, we quantify how accurately skeletal morphology can predict ecology in living and extinct birds, and show...
Article
Full-text available
Allosauroid theropods were a diverse and widespread radiation of Jurassic-Cretaceous megapredators. Achieving some of the largest body sizes among theropod dinosaurs, these colossal hunters dominated terrestrial ecosystems until a faunal turnover redefined apex predator guild occupancy during the final 20 million years of the Cretaceous. Here we de...
Article
Full-text available
Isolated teeth from vertebrate microfossil localities often provide unique information on the biodiversity of ancient ecosystems that might otherwise remain unrecognized. Microfossil sampling is a particularly valuable tool for documenting taxa that are poorly represented in macrofossil surveys due to small body size, fragile skeletal structure, or...
Article
Full-text available
The correlation between large body size and digestive efficiency has been hypothesized to have driven trends of increasing mass in herbivorous clades by means of directional selection. Yet, to date, few studies have investigated this relationship from a phylogenetic perspective, and none, to our knowledge, with regard to trophic shifts. Here, we re...
Article
Full-text available
A new coelurosaurian theropod, Alnashetri cerropoliciensis, is reported here based on articulated hind limbs of a single individual discovered at the locality of La Buitrera (Candeleros Formation, Cenomanian–Turonian), Rı´o Negro Province, Argentina. The new taxon differs from other coelurosaurs in the possession of a low ridge that separates the r...
Article
Full-text available
The ontogenetic allometry of long bone proportions is poorly understood in Mammalia. It has previously been suggested that during mammalian ontogeny long bone proportions grow more slender (positive allometry; length ∝ circumference(>1.0) ), although this conclusion was based upon data from a few small-bodied taxa. It remains unknown how ontogeneti...
Article
Full-text available
Coelurosauria is the most diverse clade of theropod dinosaurs. Much of this diversity is present in Paraves—the clade of dinosaurs containing dromaeosaurids, troodontids, and avialans. Paraves has over 160 million years of evolutionary history that continues to the present day. The clade represents the most diverse living tetrapod group (there are...
Article
Full-text available
The large theropod dinosaur Tyrannosaurus rex underwent remarkable changes during its growth from <10 kg hatchlings to >6000 kg adults in <20 years. These changes raise fascinating questions about the morphological transformations involved, peak growth rates, and scaling of limb muscle sizes as well as the body's centre of mass that could have infl...
Article
Full-text available
The vertebrate assemblage of the lower Fremouw Formation has been studied for nearly 50 years, but many components remain poorly known. We describe a partial presacral vertebra and the distal end of a left humerus collected just above the Permian–Triassic boundary in the Shackleton Glacier region of the central Transantarctic Mountains. Our identif...
Article
Full-text available
Basal ornithopods exhibit a very low diversity in Cretaceous deposits of Asia, with only two diagnostic taxa published to date. A new basal ornithopod, Haya griva, gen. et sp. nov., is described here based on several well-preserved specimens from the Late Cretaceous Javkhlant Formation of Mongolia. Haya is diagnosed by a unique combination of chara...
Chapter
Full-text available
A Roadmap to the Dinosaurian Heritage of BirdsNew Inferences on Soft Tissue, Physiology, and BehaviorAre Bird Origins Still Controversial?Conclusions AcknowledgmentsReferences