A Dinosaur Called Tiny Free

Total Page:16

File Type:pdf, Size:1020Kb

A Dinosaur Called Tiny Free FREE A DINOSAUR CALLED TINY PDF Alan Durant,Jo Simpson | 32 pages | 06 Aug 2007 | HarperCollins Publishers | 9780007233908 | English | London, United Kingdom A Dinosaur Called Tiny by Alan Durant Members of its single species Compsognathus longipes could grow to around the size of a turkey. Paleontologists have found two well-preserved fossilsone in Germany in the s and the second in France more than a century later. Today, C. Many presentations still describe Compsognathus as "chicken-sized" dinosaurs because of the size of the German specimen, which is now believed to be a juvenile. Compsognathus longipes is one of the few dinosaur species whose diet is known with certainty: the remains of small, agile lizards are preserved in the bellies of both specimens. Teeth discovered in Portugal may be further fossil remains of the genus. Although not recognized as such at the time of its discovery, Compsognathus is the first theropod dinosaur known from a reasonably complete fossil skeleton. Until the s, it was the smallest-known non- avialan dinosaur, with the preceding centuries incorrectly labelling them as the closest relative of Archaeopteryx. However, dinosaurs discovered later, such as CaenagnathasiaMicroraptor and Parvicursorwere even smaller. The largest Compsognathus specimen is estimated to have weighed somewhere between A Dinosaur Called Tiny. Compsognathus were small, bipedal animals with long hind legs and longer tails, which they used for balance during locomotion. The forelimbs were smaller than the hindlimbs. The hand bore two large, clawed digits and a third, smaller A Dinosaur Called Tiny that may have been non-functional. The skull had five pairs of fenestrae skull openingsthe largest of which was for the orbit eye socket[7] with the eyes being larger in proportion to the rest of the skull. The lower jaw was slender and had no mandibular fenestra, a hole in the side of the lower jawbone commonly seen in archosaurs. The teeth were small but sharp, suited for its diet of small vertebrates and possibly other small animals, A Dinosaur Called Tiny as insects. Its frontmost teeth those on the premaxilla were unserrated, unlike those further back in the jaw which were flattened and more strongly recurved. The number of digits on the hand of Compsognathus has been a source of debate. Halstead depicts the animal as an amphibious dinosaur capable of feeding on aquatic prey and swimming A Dinosaur Called Tiny of reach of larger predators. Peyer confirmed these conclusions. Some relatives of Compsognathusnamely Sinosauropteryx and Sinocalliopteryxhave been preserved with the remains of simple feathers covering the body like fur, [14] promoting some scientists to suggest that Compsognathus might have been feathered in a similar way. However, no feathers or feather-like covering have been preserved with Compsognathus fossils, in contrast to Archaeopteryxwhich are found in the same sediments. A Dinosaur Called Tiny Peyer, inreported skin impressions preserved on the side of the tail starting at the 13th tail vertebra. The impressions showed small bumpy A Dinosaur Called Tiny, similar to the scales found on the tail and hind legs of Juravenator. Like Compsognathusand unlike Sinosauropteryxa patch of fossilized skin from the tail and hindlimb of the possible relative Juravenator starki shows mainly scales, though there is some indication A Dinosaur Called Tiny simple feathers were also present in the preserved areas. The German Compsognathus fossil itself most likely came from the Painten Formation of the Kapfelberg locality, specifically dated to the uppermost Kimmeridgian stage Wagner discussed the specimen briefly inwhen he coined the name Compsognathus longipes[23] and described it in detail in Although Alain Bidar originally described the specimen as a separate species called Compsognathus corallestris[12] Ostrom, Jean-Guy Michard and others have since relabeled it as another example of Compsognathus longipes. A Dinosaur Called Tiny Heinrich Fischer had originally labeled a partial foot, from the Solnhofen area, as belonging to Compsognathus longipes. Though this identification was rejected by Wilhelm Barnim Dames in[32] Friedrich von Huene nevertheless in provisionally referred the A Dinosaur Called Tiny to Compsognathus. Jens Zinke in assigned forty-nine teeth from the Kimmeridgian Guimarota formation of Portugal to the genus. These were not identical to those of C. In Virginia Morell renamed a related Chinese form, Sinosauropteryx primainto a Compsognathus prima ; [35] this has found no general acceptance. The genus Compsognathus gives its name to the family Compsognathidaea group composed mostly of small dinosaurs from the late Jurassic and early Cretaceous periods of China, Europe and South America. The A Dinosaur Called Tiny includes Aristosuchus[36] Huaxiagnathus[37] Mirischia[38] Sinosauropteryx[14] [39] and perhaps Juravenator [40] and Scipionyx. Some, such as theropod expert Thomas Holtz Jr. For almost a century, Compsognathus longipes was the only well-known small theropod species. This led to comparisons with Archaeopteryx and to suggestions of an especially close relationship with birds. In fact, Compsognathusrather than Archaeopteryxpiqued Huxley's interest in the origin of birds. Below is a simplified cladogram placing Compsognathus in Compsognathidae by Senter et al. In a study conducted by Bruce Rothschild and A Dinosaur Called Tiny paleontologists, nine foot bones referred to Compsognathus were examined for signs of stress fracturebut none were found. The remains of a lizard in the German specimen's thoracic cavity show that Compsognathus preyed on small vertebrates. This A Dinosaur Called Tiny turn led to the conclusion that its predators, Compsognathusmust have had sharp vision and the ability to rapidly accelerate and outrun the lizard. The French specimen's gastric contents consist of unidentified lizards or sphenodontids. Peter Griffiths interpreted them as immature eggs in A well-preserved fossil of a Sinosauropteryxa genus related to Compsognathusshows two oviducts bearing two unlaid eggs. These proportionally larger and less numerous eggs of Sinosauropteryx cast further doubt on the original identification of the purported Compsognathus eggs. InWilliam Sellers and Phillip Manning estimated a maximum speed of During the late Jurassic, Europe was a dry, tropical archipelago at the edge of the Tethys Sea. The fine limestone in which the skeletons of Compsognathus have been found originated in calcite from the shells of marine organisms. Both the German and French areas where Compsognathus specimens have been preserved were lagoons situated between the beaches and coral reefs of the Jurassic European islands in the Tethys Sea. The same sediments in which Compsognathus have been preserved also contain fossils of a number of marine animals such as fish, crustaceans, echinoderms and marine mollusks, confirming the coastal habitat of this theropod. No other dinosaur has been found in association with Compsognathusindicating that these little dinosaurs might in fact have been the top land predator in these islands. Children's A Dinosaur Called Tiny books commonly feature Compsognathus. For a long time they were unique in their small size, as most other small dinosaurs were discovered and described a century or more later. In The Lost World: Jurassic Parkone of the characters A Dinosaur Called Tiny identifies the species as " Compsognathus triassicus ", combining the genus name of Compsognathus longipes with the specific name of Procompsognathus triassicusA Dinosaur Called Tiny distantly related small carnivore featured in the Jurassic Park novels. From Wikipedia, the free encyclopedia. Not to be confused with Compsosaurus or Compsosuchus. Genus of reptiles fossil. Temporal range: Late Jurassic A Greek-English Lexicon abridged ed. Journal of Vertebrate Paleontology. Zoological Journal of the Linnean Society. The Ultimate Dinosaur Book. New York: Dorling Kindersley. Bibcode : Natur. Palaeobiodiversity and Palaeoenvironments. The evolution A Dinosaur Called Tiny ecology of the dinosaurs. Chen Canadian Journal of Earth Sciences. Bibcode : CaJES. Acta Geologica Sinica. Predatory Dinosaurs of the World. Archaeopteryx — der Urvogel von Solnhofen. Munich: Verlag Dr. Friedrich Pfeil. Gelehrte Anzeigen der Bayerischen Akademie der Wissenschaften. Compsognathus longipes Wagner". Abhandlungen der A Dinosaur Called Tiny Akademie der Wissenschaften. Proceedings of the Academy of Natural Sciences of Philadelphia. Annals and Magazine of Natural History. Ray A Dinosaur Called Tiny The scientific memoirs of Thomas Henry Huxley. Geological Magazine. Bibcode : GeoM Quimby Archived from the original on A Dinosaur Called Tiny Magazine. Owen as Poikilopleuron pusillusOwen". Quarterly Journal of the Geological Society of London. Journal of Systematic Palaeontology. Historical Biology. Chinese Geology. M Chiappe Signore The Dinosauria 2nd ed. University of California Press. In Padian, K. Bibcode : Sci What Is the Smallest Dinosaur: List of Small Species With Pictures & Info What is the smallest dinosaur? Not all dinosaurs were giants! This article is part of our Dinosaur Facts series. When most people think about dinosaurs they imagine very big animals. However, there were plenty of dinosaurs that were the same size as — or even smaller than — humans. Modern birds, such as the Bee Hummingbird the smallest living bird would fill up all of the top spots. It is, of course, impossible to obtain accurate measurements of the size
Recommended publications
  • A Neoceratopsian Dinosaur from the Early Cretaceous of Mongolia And
    ARTICLE https://doi.org/10.1038/s42003-020-01222-7 OPEN A neoceratopsian dinosaur from the early Cretaceous of Mongolia and the early evolution of ceratopsia ✉ Congyu Yu 1 , Albert Prieto-Marquez2, Tsogtbaatar Chinzorig 3,4, Zorigt Badamkhatan4,5 & Mark Norell1 1234567890():,; Ceratopsia is a diverse dinosaur clade from the Middle Jurassic to Late Cretaceous with early diversification in East Asia. However, the phylogeny of basal ceratopsians remains unclear. Here we report a new basal neoceratopsian dinosaur Beg tse based on a partial skull from Baruunbayan, Ömnögovi aimag, Mongolia. Beg is diagnosed by a unique combination of primitive and derived characters including a primitively deep premaxilla with four pre- maxillary teeth, a trapezoidal antorbital fossa with a poorly delineated anterior margin, very short dentary with an expanded and shallow groove on lateral surface, the derived presence of a robust jugal having a foramen on its anteromedial surface, and five equally spaced tubercles on the lateral ridge of the surangular. This is to our knowledge the earliest known occurrence of basal neoceratopsian in Mongolia, where this group was previously only known from Late Cretaceous strata. Phylogenetic analysis indicates that it is sister to all other neoceratopsian dinosaurs. 1 Division of Vertebrate Paleontology, American Museum of Natural History, New York 10024, USA. 2 Institut Català de Paleontologia Miquel Crusafont, ICTA-ICP, Edifici Z, c/de les Columnes s/n Campus de la Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès Sabadell, Barcelona, Spain. 3 Department of Biological Sciences, North Carolina State University, Raleigh, NC 27695, USA. 4 Institute of Paleontology, Mongolian Academy of Sciences, ✉ Ulaanbaatar 15160, Mongolia.
    [Show full text]
  • The Dinosaur Field Guide Supplement
    The Dinosaur Field Guide Supplement September 2010 – December 2014 By, Zachary Perry (ZoPteryx) Page 1 Disclaimer: This supplement is intended to be a companion for Gregory S. Paul’s impressive work The Princeton Field Guide to Dinosaurs, and as such, exhibits some similarities in format, text, and taxonomy. This was done solely for reasons of aesthetics and consistency between his book and this supplement. The text and art are not necessarily reflections of the ideals and/or theories of Gregory S. Paul. The author of this supplement was limited to using information that was freely available from public sources, and so more information may be known about a given species then is written or illustrated here. Should this information become freely available, it will be included in future supplements. For genera that have been split from preexisting genera, or when new information about a genus has been discovered, only minimal text is included along with the page number of the corresponding entry in The Princeton Field Guide to Dinosaurs. Genera described solely from inadequate remains (teeth, claws, bone fragments, etc.) are not included, unless the remains are highly distinct and cannot clearly be placed into any other known genera; this includes some genera that were not included in Gregory S. Paul’s work, despite being discovered prior to its publication. All artists are given full credit for their work in the form of their last name, or lacking this, their username, below their work. Modifications have been made to some skeletal restorations for aesthetic reasons, but none affecting the skeleton itself.
    [Show full text]
  • A New Taxon of Basal Ceratopsian from China and the Early Evolution of Ceratopsia
    RESEARCH ARTICLE A New Taxon of Basal Ceratopsian from China and the Early Evolution of Ceratopsia Fenglu Han1,2*, Catherine A. Forster3, James M. Clark3, Xing Xu2 1 School of Earth Sciences, China University of Geosciences, Wuhan, China, 2 Key Laboratory of Evolutionary Systematics of Vertebrates, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, China, 3 Department of Biological Sciences, The George Washington University, Washington, District of Columbia, United States of America * [email protected] a11111 Abstract Ceratopsia is one of the best studied herbivorous ornithischian clades, but the early evolu- tion of Ceratopsia, including the placement of Psittacosaurus, is still controversial and unclear. Here, we report a second basal ceratopsian, Hualianceratops wucaiwanensis gen. OPEN ACCESS et sp. nov., from the Upper Jurassic (Oxfordian) Shishugou Formation of the Junggar Basin, Citation: Han F, Forster CA, Clark JM, Xu X (2015) A northwestern China. This new taxon is characterized by a prominent caudodorsal process New Taxon of Basal Ceratopsian from China and the Early Evolution of Ceratopsia. PLoS ONE 10(12): on the subtemporal ramus of the jugal, a robust quadrate with an expansive quadratojugal e0143369. doi:10.1371/journal.pone.0143369 facet, a prominent notch near the ventral region of the quadrate, a deep and short dentary, Editor: Matthew Shawkey, University of Akron, and strongly rugose texturing on the lateral surface of the dentary. Hualianceratops shares UNITED STATES several derived characters with both Psittacosaurus and the basal ceratopsians Yinlong, Received: July 15, 2015 Chaoyangsaurus, and Xuanhuaceratops. A new comprehensive phylogeny of ceratopsians weakly supports both Yinlong and Hualianceratops as chaoyangsaurids (along with Accepted: November 3, 2015 Chaoyangsaurus and Xuanhuaceratops), as well as the monophyly of Chaoyangosauridae Published: December 9, 2015 + Psittacosaurus.
    [Show full text]
  • 1 PHILATELIC SUPPLIES (M.B.O'neill)
    List up-dated Winter 2020 (10.12.20) P R E H I S T O R Y (1 9 6 5 - 2 0 2 0) SPECIAL OFFERS EDITION (includes Fossils and Prehistoric Animals) PHILATELIC SUPPLIES (M.B.O'Neill) 359 Norton Way South Letchworth Garden City HERTS ENGLAND SG6 1SZ Telephone 01462-684191 during office hours 9.15-3.15pm Mon.-Fri.) Web-site: www.philatelicsupplies.co.uk email: [email protected] TERMS OF BUSINESS: & Notes on these lists: (Please read before ordering). 1). All stamps are unmounted mint unless specified otherwise. Our prices are also in Sterling, (£). 2). Lists are updated about every 26 weeks to include most recent stock movements and New Issues; they are therefore reasonably accurate stockwise 100% pricewise. This reduces the need for "credit notes" and refunds. Alternatives may be listed in case some items are out of stock. However, these popular lists are still best used as soon as possible. Next Prehistory listings will be printed in 6 & 12 months time so please indicate when next we should send a list on your order form. 3). New Issues Services can be provided if you wish to keep your collection up to date on a Standing Order basis. Details of this service & forms can be sent on request. Regret we do not run an on approval service. 4).All orders on our order forms are attended to by return of post. We will keep a photocopy it and return your annotated original. 5). Other Thematic Lists are available on request; Minerals/Geology, Fauna, 6).
    [Show full text]
  • Download a PDF of This Web Page Here. Visit
    Dinosaur Genera List Page 1 of 42 You are visitor number— Zales Jewelry —as of November 7, 2008 The Dinosaur Genera List became a standalone website on December 4, 2000 on America Online’s Hometown domain. AOL closed the domain down on Halloween, 2008, so the List was carried over to the www.polychora.com domain in early November, 2008. The final visitor count before AOL Hometown was closed down was 93661, on October 30, 2008. List last updated 12/15/17 Additions and corrections entered since the last update are in green. Genera counts (but not totals) changed since the last update appear in green cells. Download a PDF of this web page here. Visit my Go Fund Me web page here. Go ahead, contribute a few bucks to the cause! Visit my eBay Store here. Search for “paleontology.” Unfortunately, as of May 2011, Adobe changed its PDF-creation website and no longer supports making PDFs directly from HTML files. I finally figured out a way around this problem, but the PDF no longer preserves background colors, such as the green backgrounds in the genera counts. Win some, lose some. Return to Dinogeorge’s Home Page. Generic Name Counts Scientifically Valid Names Scientifically Invalid Names Non- Letter Well Junior Rejected/ dinosaurian Doubtful Preoccupied Vernacular Totals (click) established synonyms forgotten (valid or invalid) file://C:\Documents and Settings\George\Desktop\Paleo Papers\dinolist.html 12/15/2017 Dinosaur Genera List Page 2 of 42 A 117 20 8 2 1 8 15 171 B 56 5 1 0 0 11 5 78 C 70 15 5 6 0 10 9 115 D 55 12 7 2 0 5 6 87 E 48 4 3
    [Show full text]
  • Dinosaur Genera
    DINOSAUR GENERA since: 28-October-1995 / last updated: 29-September-2021 Thank you to George Olshevsky ("Mesozoic Meanderings #3") for the original listing on 23-October-1995 and the help to keep this list current; and also to all the other contributors from the Dinosaur Mailing List. NOW available: d-genera.pdf Genera count = 1742 (including 114 not presently considered to be dinosaurian) [nomen ex dissertatione] = name appears in a dissertation [nomen manuscriptum] = unpublished name in a manuscript for publication [nomen dubium] = name usually based on more than one type specimen [nomen nudum] = name lacking a description and/or a type specimen [nomen oblitum] = name forgotten for at least 50 years [nomen rejectum] = name rejected by the ICZN non = incorrect reference by the first to a name by the second author vide = name attributed to the first author by the second author / = name preoccupied by the second author JOS → Junior Objective Synonym of the indicated genus JSS → Junior Subjective Synonym of the indicated genus PSS → Possible Subjective Synonym of the indicated genus SSS → Suppressed Senior Synonym of the indicated genus • Aardonyx: A.M. Yates, M.F. Bonnan, J. Neveling, A. Chinsamy & M.G. Blackbeard, 2009 • "Abdallahsaurus": G. Maier, 2003 [nomen nudum → Giraffatitan] • Abdarainurus: A.O. Averianov & A.V. Lopatin, 2020 • Abelisaurus: J.F. Bonaparte & F.E. Novas, 1985 • Abrictosaurus: J.A. Hopson, 1975 • Abrosaurus: Ouyang H, 1989 • Abydosaurus: D. Chure, B.B. Britt, J.A. Whitlock & J.A. Wilson, 2010 • Acantholipan: H.E. Rivera-Sylva, E. Frey, W. Stinnesbeck, G. Carbot-Chanona, I.E. Sanchez-Uribe & J.R. Guzmán-Gutiérrez, 2018 • Acanthopholis: T.H.
    [Show full text]
  • Sexual Selection and Macroevolution
    Morphology and Evolution of the Ceratopsian Skull Andrew Knapp Submitted in partial fulfilment of the requirements of the Degree of Doctor of Philosophy School of Biological and Chemical Sciences Queen Mary University of London September 2019 Appendix A: Required statement of originality for inclusion in research degree theses I, Andrew Knapp, confirm that the research included within this thesis is my own work or that where it has been carried out in collaboration with, or supported by others, that this is duly acknowledged below and my contribution indicated. Previously published material is also acknowledged below. I attest that I have exercised reasonable care to ensure that the work is original, and does not to the best of my knowledge break any UK law, infringe any third party’s copyright or other Intellectual Property Right, or contain any confidential material. I accept that the College has the right to use plagiarism detection software to check the electronic version of the thesis. I confirm that this thesis has not been previously submitted for the award of a degree by this or any other university. The copyright of this thesis rests with the author and no quotation from it or information derived from it may be published without the prior written consent of the author. Signature: Andrew Knapp Date: 24th September 2019 1 Details of collaboration and publications: Publications arising from this thesis: Knapp A, Knell RJ, Farke AA, Loewen MA and Hone DWE (2018). Patterns of divergence in the morphology of ceratopsian dinosaurs: sympatry is not a driver of divergence. Proc. R.
    [Show full text]
  • {Download PDF} Its All About... Deadly Dinosaurs Ebook
    ITS ALL ABOUT... DEADLY DINOSAURS PDF, EPUB, EBOOK Kingfisher | 32 pages | 02 Jul 2015 | Pan MacMillan | 9780753438893 | English | London, United Kingdom Top 10 Deadliest Dinosaurs of the Mesozoic Era Deadly Dinosaurs! Find out about everything from gentle giants such as Diplodocus to deadly killing machines such as Allosaurus and the fearsome Tyrannosaurus rex. Packed with detailed photography, the latest bite-size facts, and a free audio download, this book has everything a dinosaur mad kid could need. It's all about Each book comes with a free audio download so children can take their book wherever they go, as well as glossary that's perfect for teaching and learning. Check out the other titles in the It's all about Show More Show Less. Any Condition Any Condition. No ratings or reviews yet No ratings or reviews yet. Be the first to write a review. You may also like. Dinosaurs Paperback Books. Trade Paperback Books. Trade Paperback Nonfiction Books. Cooking for One Paperback Books. Paperback Books. Series 1: 9. Deadlier than the Dinosaurs. Steve goes on a mission to uncover what was deadlier than the dinosaurs. Steve is on a mission to unearth that were far deadlier than they first appeared. Steve's on a mission to find dinosaurs with incredible abilities. Steve discovers just what it takes to be a terror from the skies. Steve Backshall on a mission to find the weirdest dinosaur ever! Steve Backshall's on a mission to find the most dangerous dinosaur of all time. Steve Backshall goes on a mission to track down the deadliest of all dinosaur defenders.
    [Show full text]
  • Reptile Family Tree Peters 2021 1909 Taxa, 235 Characters
    Turinia Enoplus Chondrichtyes Jagorina Gemuendina Manta Chordata Loganellia Ginglymostoma Rhincodon Branchiostoma Tristychius Pikaia Tetronarce = Torpedo Palaeospondylus Craniata Aquilolamna Tamiobatis Myxine Sphyrna Metaspriggina Squalus Arandaspis Pristis Poraspis Rhinobatos Drepanaspis Cladoselache Pteromyzon adult Promissum Chlamydoselachus Pteromyzon hatchling Aetobatus Jamoytius Squatina Birkenia Heterodontus Euphanerops Iniopteryx Drepanolepis Helodus Callorhinchus Haikouichthys Scaporhynchus Belantsea Squaloraja Hemicyclaspis Chimaera Dunyu CMNH 9280 Mitsukurina Rhinochimaera Tanyrhinichthys Isurus Debeerius Thelodus GLAHM–V8304 Polyodon hatchling Cetorhinus Acipenser Yanosteus Oxynotus Bandringa PF8442 Pseudoscaphirhynchus Isistius Polyodon adult Daliatus Bandringa PF5686 Gnathostomata Megachasma Xenacanthus Dracopristis Akmonistion Ferromirum Strongylosteus Ozarcus Falcatus Reptile Family Tree Chondrosteus Hybodus fraasi Hybodus basanus Pucapampella Osteichthyes Orodus Peters 2021 1943 taxa, 235 characters Gregorius Harpagofututor Leptolepis Edestus Prohalecites Gymnothorax funebris Doliodus Gymnothorax afer Malacosteus Eurypharynx Amblyopsis Lepidogalaxias Typhlichthys Anableps Kryptoglanis Phractolaemus Homalacanthus Acanthodes Electrophorus Cromeria Triazeugacanthus Gymnotus Gorgasia Pholidophorus Calamopleurus Chauliodus Bonnerichthys Dactylopterus Chiasmodon Osteoglossum Sauropsis Synodus Ohmdenia Amia Trachinocephalus BRSLI M1332 Watsonulus Anoplogaster Pachycormus Parasemionotus Aenigmachanna Protosphyraena Channa Aspidorhynchus
    [Show full text]
  • A Ceratopsian Dinosaur from the Lower Cretaceous of Western North America, and the Biogeography of Neoceratopsia
    A Ceratopsian Dinosaur from the Lower Cretaceous of Western North America, and the Biogeography of Neoceratopsia Andrew A. Farke1,3*, W. Desmond Maxwell2,3, Richard L. Cifelli3, Mathew J. Wedel4,3 1 Raymond M. Alf Museum of Paleontology, Claremont, California, United States of America, 2 Department of Biological Sciences, University of the Pacific, Stockton, California, United States of America, 3 Sam Noble Oklahoma Museum of Natural History, Norman, Oklahoma, United States of America, 4 College of Podiatric Medicine, Western University of Health Sciences, Pomona, California, United States of America Abstract The fossil record for neoceratopsian (horned) dinosaurs in the Lower Cretaceous of North America primarily comprises isolated teeth and postcrania of limited taxonomic resolution, hampering previous efforts to reconstruct the early evolution of this group in North America. An associated cranium and lower jaw from the Cloverly Formation (?middle–late Albian, between 104 and 109 million years old) of southern Montana is designated as the holotype for Aquilops americanus gen. et sp. nov. Aquilops americanus is distinguished by several autapomorphies, including a strongly hooked rostral bone with a midline boss and an elongate and sharply pointed antorbital fossa. The skull in the only known specimen is comparatively small, measuring 84 mm between the tips of the rostral and jugal. The taxon is interpreted as a basal neoceratopsian closely related to Early Cretaceous Asian taxa, such as Liaoceratops and Auroraceratops. Biogeographically, A. americanus probably originated via a dispersal from Asia into North America; the exact route of this dispersal is ambiguous, although a Beringian rather than European route seems more likely in light of the absence of ceratopsians in the Early Cretaceous of Europe.
    [Show full text]
  • Dinosaurs - ERTH 2401 – Course Outline for Winter 2021
    Dinosaurs - ERTH 2401 – Course Outline for Winter 2021 Instructor: Michael Ryan, [email protected] Due to Covid restrictions, I do not have an on-campus office. Teaching Assistants: TBA The course will Be delivered asynchronously (pre-recorded) using cuLearn. There will Be two 80- minute lectures uploaded and released each week at the Beginning of their scheduled time slots. Additional non-examination material may Be uploaded as support material for each lecture. It is important that you have access to cuLearn. If you have difficulties connecting, please solve these issues with the university. Lectures: Monday 10:05 am – 11:25 pm; Wednesday 10:05 am – 11:25pm. Office hours: Mondays and Wednesdays 1:00 pm to 2:00 pm. Office hours will Be conducted via Zoom. A Zoom link (invitation) for each office hour will Be posted with each lecture and will Be open to anyone accessing the meeting through that link. If you require a one-on-one session, please e-mail me to arrange a meeting. Questions about the course or the lecture material should Be emailed to [email protected]. E-mailed questions will Be responded to within 24 hours. Note that e-mails will only Be responded to Between 9:00 am to 5:00 pm, Monday to Friday. Grade Breakdown: Midterm 1: 30%, 80 minutes Midterm 2: 35%, 80 minutes Final Exam: 35%, 2 hours TBA Note that midterm 2 and the final exam are non-cumulative. The exams will Be taken on-line through cuLearn. A valid excuse for missing the midterm is for medical reasons or death in the family, and must Be documented with a medical certificate (see also the section Academic Accommodation).
    [Show full text]
  • Evolution and Ecological Associations in Herbivorous Theropods Albert Chen 4/25/2016 Advisor: Dr
    Evolution and Ecological Associations in Herbivorous Theropods Albert Chen 4/25/2016 Advisor: Dr. Thomas Holtz GEOL 394 1 Abstract Theropod dinosaurs are inferred to have been ancestrally carnivorous and include numerous lineages specialized for hypercarnivory. However, evidence from fossil gut contents, anatomical characteristics, and phylogenetic bracketing suggests that several theropod clades convergently transitioned away from a carnivorous lifestyle to become herbivores or omnivores. The evolutionary drivers of these trophic shifts are unknown. Methods involving the use of the Paleobiology Database (PBDB) were used to test for the potential impact of ecological factors that may have affected the diversification of non-hypercarnivorous theropods, such as the diversity of other herbivorous vertebrates, the diversity of plants, and change in global sea level. After demonstrating feasibility of the proposed methods by using restricted parameters (solely considering oviraptorosaurian theropods from the Cretaceous of Asia and contemporaneous herbivores), said methods were applied to an expanded dataset including more than 500 taxa from 51 geologic formations. No statistically significant correlations were found between non- hypercarnivorous theropod diversity and that of plants, but overall diversity of non- hypercarnivorous theropods was found to positively correlate through space and time with the diversity of other herbivores. These results suggest that non-hypercarnivorous theropods did not strongly compete with contemporaneous herbivores.
    [Show full text]