Theropod and Possible Ornithopod Track Assemblages from The
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JVP 26(3) September 2006—ABSTRACTS
Neoceti Symposium, Saturday 8:45 acid-prepared osteolepiforms Medoevia and Gogonasus has offered strong support for BODY SIZE AND CRYPTIC TROPHIC SEPARATION OF GENERALIZED Jarvik’s interpretation, but Eusthenopteron itself has not been reexamined in detail. PIERCE-FEEDING CETACEANS: THE ROLE OF FEEDING DIVERSITY DUR- Uncertainty has persisted about the relationship between the large endoskeletal “fenestra ING THE RISE OF THE NEOCETI endochoanalis” and the apparently much smaller choana, and about the occlusion of upper ADAM, Peter, Univ. of California, Los Angeles, Los Angeles, CA; JETT, Kristin, Univ. of and lower jaw fangs relative to the choana. California, Davis, Davis, CA; OLSON, Joshua, Univ. of California, Los Angeles, Los A CT scan investigation of a large skull of Eusthenopteron, carried out in collaboration Angeles, CA with University of Texas and Parc de Miguasha, offers an opportunity to image and digital- Marine mammals with homodont dentition and relatively little specialization of the feeding ly “dissect” a complete three-dimensional snout region. We find that a choana is indeed apparatus are often categorized as generalist eaters of squid and fish. However, analyses of present, somewhat narrower but otherwise similar to that described by Jarvik. It does not many modern ecosystems reveal the importance of body size in determining trophic parti- receive the anterior coronoid fang, which bites mesial to the edge of the dermopalatine and tioning and diversity among predators. We established relationships between body sizes of is received by a pit in that bone. The fenestra endochoanalis is partly floored by the vomer extant cetaceans and their prey in order to infer prey size and potential trophic separation of and the dermopalatine, restricting the choana to the lateral part of the fenestra. -
New Heterodontosaurid Remains from the Cañadón Asfalto Formation: Cursoriality and the Functional Importance of the Pes in Small Heterodontosaurids
Journal of Paleontology, 90(3), 2016, p. 555–577 Copyright © 2016, The Paleontological Society 0022-3360/16/0088-0906 doi: 10.1017/jpa.2016.24 New heterodontosaurid remains from the Cañadón Asfalto Formation: cursoriality and the functional importance of the pes in small heterodontosaurids Marcos G. Becerra,1 Diego Pol,1 Oliver W.M. Rauhut,2 and Ignacio A. Cerda3 1CONICET- Museo Palaeontológico Egidio Feruglio, Fontana 140, Trelew, Chubut 9100, Argentina 〈[email protected]〉; 〈[email protected]〉 2SNSB, Bayerische Staatssammlung für Paläontologie und Geologie and Department of Earth and Environmental Sciences, LMU München, Richard-Wagner-Str. 10, Munich 80333, Germany 〈[email protected]〉 3CONICET- Instituto de Investigación en Paleobiología y Geología, Universidad Nacional de Río Negro, Museo Carlos Ameghino, Belgrano 1700, Paraje Pichi Ruca (predio Marabunta), Cipolletti, Río Negro, Argentina 〈[email protected]〉 Abstract.—New ornithischian remains reported here (MPEF-PV 3826) include two complete metatarsi with associated phalanges and caudal vertebrae, from the late Toarcian levels of the Cañadón Asfalto Formation. We conclude that these fossil remains represent a bipedal heterodontosaurid but lack diagnostic characters to identify them at the species level, although they probably represent remains of Manidens condorensis, known from the same locality. Histological features suggest a subadult ontogenetic stage for the individual. A cluster analysis based on pedal measurements identifies similarities of this specimen with heterodontosaurid taxa and the inclusion of the new material in a phylogenetic analysis with expanded character sampling on pedal remains confirms the described specimen as a heterodontosaurid. Finally, uncommon features of the digits (length proportions among nonungual phalanges of digit III, and claw features) are also quantitatively compared to several ornithischians, theropods, and birds, suggesting that this may represent a bipedal cursorial heterodontosaurid with gracile and grasping feet and long digits. -
This Article Appeared in a Journal Published by Elsevier. the Attached
This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues. Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier’s archiving and manuscript policies are encouraged to visit: http://www.elsevier.com/copyright Author's personal copy Cretaceous Research 32 (2011) 135e142 Contents lists available at ScienceDirect Cretaceous Research journal homepage: www.elsevier.com/locate/CretRes A reassessment of large theropod dinosaur tracks from the mid-Cretaceous (late AlbianeCenomanian) Winton Formation of Lark Quarry, central-western Queensland, Australia: A case for mistaken identity Anthony Romilio a,*, Steven W. Salisbury a,b a School of Biological Sciences, The University of Queensland, Brisbane, Qld 4072, Australia b Vertebrate Paleontology Section, Carnegie Museum of Natural History, 4400 Forbes Ave, Pittsburgh, PA 15213-4080, USA article info abstract Article history: Multivariate analysis is used to differentiate shape variations between ichnites of theropod and Received 9 June 2010 ornithopod dinosaurs. Tracks of an alleged theropod cf. Tyrannosauropus from the mid-Cretaceous (late Accepted in revised form 10 November 2010 AlbianeCenomanian) Winton Formation of Lark Quarry, central-western Queensland, Australia were Available online 22 November 2010 examined and foot shape ratios calculated. Multivariate analysis of these shape variables indicates this track-maker was an ornithopod dinosaur. -
A Phylogenetic Analysis of the Basal Ornithischia (Reptilia, Dinosauria)
A PHYLOGENETIC ANALYSIS OF THE BASAL ORNITHISCHIA (REPTILIA, DINOSAURIA) Marc Richard Spencer A Thesis Submitted to the Graduate College of Bowling Green State University in partial fulfillment of the requirements of the degree of MASTER OF SCIENCE December 2007 Committee: Margaret M. Yacobucci, Advisor Don C. Steinker Daniel M. Pavuk © 2007 Marc Richard Spencer All Rights Reserved iii ABSTRACT Margaret M. Yacobucci, Advisor The placement of Lesothosaurus diagnosticus and the Heterodontosauridae within the Ornithischia has been problematic. Historically, Lesothosaurus has been regarded as a basal ornithischian dinosaur, the sister taxon to the Genasauria. Recent phylogenetic analyses, however, have placed Lesothosaurus as a more derived ornithischian within the Genasauria. The Fabrosauridae, of which Lesothosaurus was considered a member, has never been phylogenetically corroborated and has been considered a paraphyletic assemblage. Prior to recent phylogenetic analyses, the problematic Heterodontosauridae was placed within the Ornithopoda as the sister taxon to the Euornithopoda. The heterodontosaurids have also been considered as the basal member of the Cerapoda (Ornithopoda + Marginocephalia), the sister taxon to the Marginocephalia, and as the sister taxon to the Genasauria. To reevaluate the placement of these taxa, along with other basal ornithischians and more derived subclades, a phylogenetic analysis of 19 taxonomic units, including two outgroup taxa, was performed. Analysis of 97 characters and their associated character states culled, modified, and/or rescored from published literature based on published descriptions, produced four most parsimonious trees. Consistency and retention indices were calculated and a bootstrap analysis was performed to determine the relative support for the resultant phylogeny. The Ornithischia was recovered with Pisanosaurus as its basalmost member. -
Sedimentologic Properties of the Oil-Producing Late Cretaceous
Sedimentologic properties of the oil-producing Late Cretaceous fluvio-deltaic Fuyu reservoirs of the Quantou Formation, Songliao Basin, Anda Sag, NE China Zhang, Jingjun1,2, Osman Salad Hersi2, Han jiangbo1. 1Geoscience Institute, Northeast Petroleum University, 2Department of Geology, University of Regina. Summary The Lower Cretaceous system of the Songliao Basin consists of several oil- and gas-producing sandstone intervals with muddy intervals that act as cap rocks. The reservoir units include, in an ascending order, Fuyu, Gaotaizi, Putahohua and Heidimioao. The Fuyu reservoir constitutes the upper part of the Quantou Formation, particularly the uppermost strata of K1q3 member and the overlying K1q4 member. The reservoir interval consists of fine-grained sandstone with claystone to siltstone interlayers. The sandstone reservoir units are characterized by moderately sorted, fine-grained, planar to low angle tabular cross beddings and cross-laminations. The sandstone commonly have sharp to erosional lower boundaries with the muddier facies and sharp to gradational upper boundary with the muddier facies. These sedimentary properties along with patterns of the wireline logs from wells in the study area suggest that the strata of the Fuyu reservoirs accumulated in a fluvial to deltaic depositional system that ended up in a lacustrine environment. The depositional system was most likely river-dominated where tidal influence and wave actions were apparently minimal. The sediments brought by the rivers were fine (clay to fine-sand size) in nature. It is interpreted that the sandy facies accumulated in both subaerial and subaqueous distributary channels of delta plane and proximal delta front settings. The muddy facies accumulated interchannel and distal delta front settings. -
Stegosaurian Footprints from the Morrison Formation of Utah and Their Implications for Interpreting Other Ornithischian Tracks Gerard D
Stegosaurian footprints from the Morrison Formation of Utah and their implications for interpreting other ornithischian tracks Gerard D. Gierliński and Karol Sabath Polish Geological Institute, Rakowiecka 4, 00-975 Warsaw, Poland. e-mail: [email protected] ABSTRACT - The supposed stegosaurian track Deltapodus Whyte & Romano, 1994 (Middle Jurassic of England) is sauro- pod-like, elongate and plantigrade, but many blunt-toed, digitigrade, large ornithopod-like footprints (including pedal print cast associated with the manus of Stegopodus Lockley & Hunt, 1998) from the Upper Jurassic of Utah, better fit the stego- saurian foot pattern. The Morrison Formation of Utah yielded other tracks fitting the dryomorph (camptosaur) foot pattern (Dinehichnus Lockley et al., 1998) much better than Stegopodus. If the Stegopodus pedal specimen (we propose to shift the emphasis from the manus to the pes in the revised diagnosis of this ichnotaxon) and similar ichnites are proper stegosaur foot- prints, Deltapodus must have been left by another thyreophoran trackmaker. Other Deltapodus-like (possibly ankylosaurian) tracks include Navahopus Baird,1980 and Apulosauripus Nicosia et al., 1999. Heel-dominated, short-toed forms within the Navahopus-Deltapodus-Apulosauripus plexus differ from the gracile, relatively long-toed Tetrapodosaurus Sternberg, 1932, traditionally regarded as an ankylosaurian track. Thus, the original interpretation of the latter as a ceratopsian track might be correct, supporting early (Aptian) appearance of ceratopsians in North America. Isolated pedal ichnites from the Morrison Formation (with a single tentatively associated manus print, and another one from Poland) and the only known trackways with similar footprints (Upper Jurassic of Asturias, Spain) imply bipedal gait of their trackmakers. Thus, problems with stegosaur tracks possibly stem from the expectation of their quadrupedality. -
Lyons SCIENCE 2021 the Influence of Juvenile Dinosaurs SUPPL.Pdf
science.sciencemag.org/content/371/6532/941/suppl/DC1 Supplementary Materials for The influence of juvenile dinosaurs on community structure and diversity Katlin Schroeder*, S. Kathleen Lyons, Felisa A. Smith *Corresponding author. Email: [email protected] Published 26 February 2021, Science 371, 941 (2021) DOI: 10.1126/science.abd9220 This PDF file includes: Materials and Methods Supplementary Text Figs. S1 and S2 Tables S1 to S7 References Other Supplementary Material for this manuscript includes the following: (available at science.sciencemag.org/content/371/6532/941/suppl/DC1) MDAR Reproducibility Checklist (PDF) Materials and Methods Data Dinosaur assemblages were identified by downloading all vertebrate occurrences known to species or genus level between 200Ma and 65MA from the Paleobiology Database (PaleoDB 30 https://paleobiodb.org/#/ download 6 August, 2018). Using associated depositional environment and taxonomic information, the vertebrate database was limited to only terrestrial organisms, excluding amphibians, pseudosuchians, champsosaurs and ichnotaxa. Taxa present in formations were confirmed against the most recent available literature, as of November, 2020. Synonymous taxa or otherwise duplicated taxa were removed. Taxa that could not be identified to genus level 35 were included as “Taxon X”. GPS locality data for all formations between 200MA and 65MA was downloaded from PaleoDB to create a minimally convex polygon for each possible formation. Any attempt to recreate local assemblages must include all potentially interacting species, while excluding those that would have been separated by either space or time. We argue it is 40 acceptable to substitute formation for home range in the case of non-avian dinosaurs, as range increases with body size. -
United States Department of the Interior U.S. Geological Survey
UNITED STATES DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY Geology and Hydrocarbon Resources of Onshore Basins in Eastern China by Gregory Ulmishek* c U.S. Geological Survey Open-File Report 93-4 This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards (or with the North American Stratigraphic Code). Any use of trade, product or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. 1 Denver, Colorado 1992 CONTENTS Page Purpose and Scope of Study..................................................................................... 1 Ordos Basin Introduction................................................................................................................. 3 Stratigraphy.................................................................................................................. 3 Tectonics....................................................................................................................... 16 Petroleum Geology and Potential Exploration Plays.......................................... 17 Sichuan Basin Introduction................................................................................................................. 29 Stratigraphy.................................................................................................................. 29 Tectonics....................................................................................................................... 40 Petroleum Geology -
Sauropod and Small Theropod Tracks from the Lower Jurassic Ziliujing Formation of Zigong City, Sichuan, China, with an Overview
Ichnos, 21:119–130, 2014 Copyright Ó Taylor & Francis Group, LLC ISSN: 1042-0940 print / 1563-5236 online DOI: 10.1080/10420940.2014.909352 Sauropod and Small Theropod Tracks from the Lower Jurassic Ziliujing Formation of Zigong City, Sichuan, China, with an Overview of Triassic–Jurassic Dinosaur Fossils and Footprints of the Sichuan Basin Lida Xing,1 Guangzhao Peng,2 Yong Ye,2 Martin G. Lockley,3 Hendrik Klein,4 W. Scott Persons IV,5 Jianping Zhang,1 Chunkang Shu,2 and Baoqiao Hao2 1School of the Earth Sciences and Resources, China University of Geosciences, Beijing, China 2Zigong Dinosaur Museum, Zigong, Sichuan, China 3Dinosaur Trackers Research Group, University of Colorado, Denver, Colorado, USA 4Saurierwelt Palaontologisches€ Museum, Neumarkt, Germany 5Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada Keywords Grallator, Parabrontopodus, Hejie tracksite, Ma’anshan A dinosaur footprint assemblage from the Lower Jurassic Member, Zigong Ziliujing Formation of Zigong City, Sichuan, China, comprises about 300 tracks of small tridactyl theropods and large sauropods preserved as concave epireliefs (natural molds). The INTRODUCTION theropod footprints show similarities with both the ichnogenera Zigong is famous for the Middle Jurassic Shunosaurus Grallator and Jialingpus. Three different morphotypes are fauna and the Late Jurassic Mamenchisaurus fauna. However, present, probably related to different substrate conditions and extramorphological variation. A peculiar preservational feature fossils from the Early Jurassic and the Late Triassic are com- in a morphotype that reflects a gracile trackmaker with paratively rare. Previously reported Early Jurassic fossils extremely slender digits, is the presence of a convex epirelief that include fragmentary prosauropod and sauropod skeletal occurs at the bottom of the concave digit impressions. -
A New Basal Ornithopod Dinosaur from the Lower Cretaceous of China
A new basal ornithopod dinosaur from the Lower Cretaceous of China Yuqing Yang1,2,3, Wenhao Wu4,5, Paul-Emile Dieudonné6 and Pascal Godefroit7 1 College of Resources and Civil Engineering, Northeastern University, Shenyang, Liaoning, China 2 College of Paleontology, Shenyang Normal University, Shenyang, Liaoning, China 3 Key Laboratory for Evolution of Past Life and Change of Environment, Province of Liaoning, Shenyang Normal University, Shenyang, Liaoning, China 4 Key Laboratory for Evolution of Past Life and Environment in Northeast Asia, Ministry of Education, Jilin University, Changchun, Jilin, China 5 Research Center of Paleontology and Stratigraphy, Jilin University, Changchun, Jilin, China 6 Instituto de Investigación en Paleobiología y Geología, CONICET, Universidad Nacional de Río Negro, Rio Negro, Argentina 7 Directorate ‘Earth and History of Life’, Royal Belgian Institute of Natural Sciences, Brussels, Belgium ABSTRACT A new basal ornithopod dinosaur, based on two nearly complete articulated skeletons, is reported from the Lujiatun Beds (Yixian Fm, Lower Cretaceous) of western Liaoning Province (China). Some of the diagnostic features of Changmiania liaoningensis nov. gen., nov. sp. are tentatively interpreted as adaptations to a fossorial behavior, including: fused premaxillae; nasal laterally expanded, overhanging the maxilla; shortened neck formed by only six cervical vertebrae; neural spines of the sacral vertebrae completely fused together, forming a craniocaudally-elongated continuous bar; fused scapulocoracoid with prominent -
Subject Index
Cambridge University Press 0521811724 - The Evolution and Extinction of the Dinosaurs, Second Edition David E. Fastovsky and David B. Weishampel Index More information Subject index Bold type indicates figures. Absolute age 23–5 Arctic dinosaurs 372–373, 373 Actinopterygii 67 Asteroid impact 425, 426–32 Aguja Formation (Upper Cretaceous, USA) 401 see also Cretaceous–Tertiary boundary; Alxa Desert (China) 297 Iridium; Chicxulub Amarga Canyon (Argentina) 262 Affects of 432–4 American Museum of Natural History (USA) Indicators of 426, 427–9, 428, 429, 430, 431 18n, 19, 253, 259, 292 Atlas Mountains (Morocco) 263 Amnion 77 Auca Mahuevo (Upper Cretaceous, Argentina) Amniota 245, 246 Diagnostic characters 77, 78 Aves, see Theropoda Major groups 78 Azendoh (Morocco) 261 Amphibia 77, 77n, 393 Amur River (Sino-Russian border) 217 Baharije Oasis (Egypt) 291, 292 Anapsida 78, 79–80 Barun Goyot Formation (Upper Cretaceous, Anhui Province (China) 162 Mongolia) 401 Ankylosauria Bernissart (Belgium) 212, 213 Age 133, 396, 397 Biological classification 68 Armament 133, 137, 138, 139 Biostratigraphy 22, 27–8 Behavior 134–7, 138–9 Birds, see Theropoda Clades of 133, 139–42 Body plans 65 Cladogram of, see Cladograms Bone histology 362–7, 363 Derived characters of 140, 139–41, 142 British Museum (Natural History) 234, 258, 336 Distribution 134, 135 Bug Creek (USA) 441 Evolution of 139 Burgess Shale (Middle Cambrian, Canada) 64 Fermentation in 136, 137 Burial 6, 7, 8, 9, 10 History of discovery 142–5 Inferred intelligence 361 Canadian Dinosaur Rush 182, 183, -
Paleontology of the Bears Ears National Monument
Paleontology of Bears Ears National Monument (Utah, USA): history of exploration, study, and designation 1,2 3 4 5 Jessica Uglesich , Robert J. Gay *, M. Allison Stegner , Adam K. Huttenlocker , Randall B. Irmis6 1 Friends of Cedar Mesa, Bluff, Utah 84512 U.S.A. 2 University of Texas at San Antonio, Department of Geosciences, San Antonio, Texas 78249 U.S.A. 3 Colorado Canyons Association, Grand Junction, Colorado 81501 U.S.A. 4 Department of Integrative Biology, University of Wisconsin-Madison, Madison, Wisconsin, 53706 U.S.A. 5 University of Southern California, Los Angeles, California 90007 U.S.A. 6 Natural History Museum of Utah and Department of Geology & Geophysics, University of Utah, 301 Wakara Way, Salt Lake City, Utah 84108-1214 U.S.A. *Corresponding author: [email protected] or [email protected] Submitted September 2018 PeerJ Preprints | https://doi.org/10.7287/peerj.preprints.3442v2 | CC BY 4.0 Open Access | rec: 23 Sep 2018, publ: 23 Sep 2018 ABSTRACT Bears Ears National Monument (BENM) is a new, landscape-scale national monument jointly administered by the Bureau of Land Management and the Forest Service in southeastern Utah as part of the National Conservation Lands system. As initially designated in 2016, BENM encompassed 1.3 million acres of land with exceptionally fossiliferous rock units. Subsequently, in December 2017, presidential action reduced BENM to two smaller management units (Indian Creek and Shash Jáá). Although the paleontological resources of BENM are extensive and abundant, they have historically been under-studied. Here, we summarize prior paleontological work within the original BENM boundaries in order to provide a complete picture of the paleontological resources, and synthesize the data which were used to support paleontological resource protection.