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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 Materials of Chalicotherium Brevirostris (Perissodactyla, Chalicotheriidae)
Geobios 45 (2012) 369–376 Available online at www.sciencedirect.com Original article New materials of Chalicotherium brevirostris (Perissodactyla, Chalicotheriidae) § from the Tunggur Formation, Inner Mongolia Yan Liu *, Zhaoqun Zhang Laboratory of Evolutionary Systematics of Vertebrate, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, 142, Xizhimenwai Street, PO Box 643, Beijing 100044, PR China A R T I C L E I N F O A B S T R A C T Article history: Chalicotherium brevirostris was named by Colbert based on a skull lacking mandibles from the late Middle Received 23 March 2011 Miocene Tunggur Formation, Tunggur, Inner Mongolia, China. Here we describe new mandibular Accepted 6 October 2011 materials collected from the same area. In contrast to previous expectations, the new mandibular Available online 14 July 2012 materials show a long snout, long diastema, a three lower incisors and a canine. C. brevirostris shows some sexual dimorphism and intraspecific variation in morphologic characters. The new materials differ Keywords: from previously described C. cf. brevirostris from Cixian County (Hebei Province) and the Tsaidam Basin, Tunggur which may represent a different, new species close to C. brevirostris. The diagnosis of C. brevirostris is Middle Miocene revised. Chalicotheriinae Chalicotherium ß 2012 Elsevier Masson SAS. All rights reserved. 1. Abbreviations progress in understanding the Tunggur geology and paleontology (Qiu et al., 1988). The most important result of this expedition so far is -
Agate Fossil Beds National Monument: a Proposal
a frMrfxteaC Tincted Sfatei. 'Hattattat 'Pa'16, Service Cover: FOSSIL SLAB FROM THE AGATE QUARRIES Courtesy University of Nebraska State Museum ANCIENT LIFE AT THE AGATE SITE Illustration by Charles R. Knight Courtesy Chicago Natural History Museum PROPOSED AGATE FOSSIL BEDS NATIONAL MONUMENT NEBRASKA August 1963 Department of the Interior National Park Service Midwest Region Omaha, Nebraska Created in I8U9, the Department of the Interior— America's Department of Natural Resources—is concerned with the management, conservation, and development of the Nation's water, wildlife, mineral, forest, and park and recreational resources. It also has major responsibilities for Indian and Territorial affairs. As the Nation's principal conservation agency, the Department works to assure that nonrenewable re sources are developed and used wisely, that park and recreational resources make their full contri bution to the progress, prosperity, and security of the United States—now and in the future. CONTENTS Page Introduction 1 The Setting 3 Geologic History 7 Fossil Collecting History 23 The Cook Family - Early Pioneers of the West 29 Significance 33 Suitability 35 Feasibility 38 Conclusions and Recommendations 39 Proposed Development and Use kl The Proposed Area and Its Administration k6 Acknowledgements k7 Bibliography kQ Fifteen Million Years Ago in Western Nebraska From an illustration by Erwin Christinas Courtesy Natural History Magazine INTRODUCTION The Agate Springs Fossil Quarries site located in Sioux County, Nebraska, is world renowned for its rich concentrations of the fossil remains of mammals that lived fifteen million years ago. A study of this site was made by the Midwest Region, National Park Service in the fall of i960, and a preliminary report prepared. -
From the Early Miocene of Southeastern Wyoming Robert M
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Papers in the Earth and Atmospheric Sciences Earth and Atmospheric Sciences, Department of 2002 New Amphicyonid Carnivorans (Mammalia, Daphoeninae) from the Early Miocene of Southeastern Wyoming Robert M. Hunt Jr. University of Nebraska-Lincoln, [email protected] Follow this and additional works at: https://digitalcommons.unl.edu/geosciencefacpub Part of the Earth Sciences Commons Hunt, Robert M. Jr., "New Amphicyonid Carnivorans (Mammalia, Daphoeninae) from the Early Miocene of Southeastern Wyoming" (2002). Papers in the Earth and Atmospheric Sciences. 546. https://digitalcommons.unl.edu/geosciencefacpub/546 This Article is brought to you for free and open access by the Earth and Atmospheric Sciences, Department of at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Papers in the Earth and Atmospheric Sciences by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. PUBLISHED BY THE AMERICAN MUSEUM OF NATURAL HISTORY CENTRAL PARK WEST AT 79TH STREET, NEW YORK, NY 10024 Number 3385, 41 pp., 28 ®gures, 4 tables December 27, 2002 New Amphicyonid Carnivorans (Mammalia, Daphoeninae) from the Early Miocene of Southeastern Wyoming ROBERT M. HUNT, JR.1 CONTENTS Abstract ....................................................................... 2 Introduction .................................................................... 2 Abbreviations ............................................................... -
Erinaceidae, Insectivora, Mammalia) from the Oligocene of Mongolia A
Paleontological Journal, Vol. 36, No. 3, 2002, pp. 302–306. Translated from Paleontologicheskii Zhurnal, No. 3, 2002, pp. 75–80. Original Russian Text Copyright © 2002 by Lopatin. English Translation Copyright © 2002 by åÄIä “Nauka /Interperiodica” (Russia). The Largest Asiatic Amphechinus (Erinaceidae, Insectivora, Mammalia) from the Oligocene of Mongolia A. V. Lopatin Paleontological Institute, Russian Academy of Sciences, Profsoyuznaya ul. 123, Moscow, 117997 Russia e-mail: [email protected] Received October 26, 2000 Abstract—A lower jaw fragment of a new hedgehog species, Amphechinus gigas sp. nov., from the Oligocene Shand-Gol Formation of Mongolia is described. This species is substantially larger than A. rectus, A. akespensis, and other known Amphechinus species from Asia and comparable in size to the European species A. robustus, A. ginsburgi, and A. intermedius. Regarding the length of the lower cheek tooth row, A. gigas is comparable to Recent Erinaceus europaeus; however, the much deeper and more massive horizontal ramus of the dentary shows that A. gigas is larger than the latter. INTRODUCTION europaeus; at the same time, its lower jaw is substan- tially larger and more massive than those of the listed Amphechinus belongs to the earliest genera of the species. The fragmentary lower jaw of the new species subfamily Erinaceinae. This genus was widespread in was found together with A. rectus and A. cf. kansuensis. the Oligocene and Miocene of Eurasia and occurred in the Miocene of North America and Africa (Gureev, 1979; Gould, 1995). The following six species were described from Asia: Oligocene A. rectus (Matthew et Granger, 1924), A. kansuensis (Bohlin, 1942), and A. -
Chapter 1 - Introduction
EURASIAN MIDDLE AND LATE MIOCENE HOMINOID PALEOBIOGEOGRAPHY AND THE GEOGRAPHIC ORIGINS OF THE HOMININAE by Mariam C. Nargolwalla A thesis submitted in conformity with the requirements for the degree of Doctor of Philosophy Graduate Department of Anthropology University of Toronto © Copyright by M. Nargolwalla (2009) Eurasian Middle and Late Miocene Hominoid Paleobiogeography and the Geographic Origins of the Homininae Mariam C. Nargolwalla Doctor of Philosophy Department of Anthropology University of Toronto 2009 Abstract The origin and diversification of great apes and humans is among the most researched and debated series of events in the evolutionary history of the Primates. A fundamental part of understanding these events involves reconstructing paleoenvironmental and paleogeographic patterns in the Eurasian Miocene; a time period and geographic expanse rich in evidence of lineage origins and dispersals of numerous mammalian lineages, including apes. Traditionally, the geographic origin of the African ape and human lineage is considered to have occurred in Africa, however, an alternative hypothesis favouring a Eurasian origin has been proposed. This hypothesis suggests that that after an initial dispersal from Africa to Eurasia at ~17Ma and subsequent radiation from Spain to China, fossil apes disperse back to Africa at least once and found the African ape and human lineage in the late Miocene. The purpose of this study is to test the Eurasian origin hypothesis through the analysis of spatial and temporal patterns of distribution, in situ evolution, interprovincial and intercontinental dispersals of Eurasian terrestrial mammals in response to environmental factors. Using the NOW and Paleobiology databases, together with data collected through survey and excavation of middle and late Miocene vertebrate localities in Hungary and Romania, taphonomic bias and sampling completeness of Eurasian faunas are assessed. -
Oligocene and Early Miocene Mammal Biostratigraphy of the Valley of Lakes in Mongolia
Palaeobio Palaeoenv (2017) 97:219–231 DOI 10.1007/s12549-016-0264-x ORIGINAL PAPER Oligocene and early Miocene mammal biostratigraphy of the Valley of Lakes in Mongolia Mathias Harzhauser1 & Gudrun Daxner-Höck1 & Margarita A. Erbajeva2 & Paloma López-Guerrero1,3 & Olivier Maridet4,5 & Adriana Oliver 1,6 & Werner E. Piller7 & Ursula B. Göhlich1 & Reinhard Ziegler8 Received: 13 July 2016 /Revised: 28 October 2016 /Accepted: 10 November 2016 /Published online: 15 December 2016 # The Author(s) 2017. This article is published with open access at Springerlink.com Abstract The Taatsiin Gol Basin in Mongolia is a key area for data. Therefore, we test and evaluate the informal biozonation understanding the evolution and dispersal of Central Asian scheme that has been traditionally used for biostratigraphic mammal faunas during the Oligocene and early Miocene. correlations within the basin. Based on the analysis of the huge After two decades of intense fieldwork, the area is extraordi- dataset, a formalised biostratigraphic scheme is proposed. It narily well sampled and taxonomically well studied, yielding a comprises the Cricetops dormitor Taxon Range Zone large dataset of 19,042 specimens from 60 samples. The spec- (Rupelian), subdivided into the Allosminthus khandae Taxon imens represent 176 species-level and 99 genus-level taxa com- Range Subzone and the Huangomys frequens Abundance prising 135 small mammal species and 47 large mammals. A Subzone, the Amphechinus taatsiingolensis Abundance Zone detailed lithostratigraphy and new magnetostratigraphic and (early Chattian), the Amphechinus major Taxon Range Zone radiometric datings provide an excellent frame for these biotic (late Chattian), subdivided into the Yindirtemys deflexus This article is a contribution to the special issue BThe Valley of Lakes in Mongolia, a key area of Cenozoic mammal evolution and stratigraphy^. -
From the Gulf Coastal Plain
Bull. Fla. Mus. Nat. Hist. (2005) 45(4): 355-361 355 EKGMOWECHASHALA (MAMMALIA, ?PRIMATES) FROM THE GULF COASTAL PLAIN L. Barry Albright III1 A single, small, water-worn tooth from the “middle” Arikareean Toledo Bend Local Fauna of the Gulf Coastal Plain closely resembles the lower fourth premolar of the questionable primate Ekgmowechashala. The only known species of the genus, Ekgmowechashala philotau Macdonald (1963), was originally recovered from the early Arikareean Sharps Formation of South Dakota, but is also known from similar aged strata of the John Day Formation, Oregon. Although the Toledo Bend specimen differs somewhat in morphology from the p4 of E. philotau, a new species is not named in this report because of such limited material and because the specimen is incomplete. Unfortunately, the specimen does not provide information that helps clarify current arguments regarding the affinities of Ekgmowechashala with primates or plagiomenids. It does, however, provide (1) a temporal range extension for the genus to the early late Arikareean, or about four million years younger than previously known, and (2) a geographic extension east and considerably south of its prior distribution. If Ekgmowechashala is ultimately deter- mined to belong to the Primates, then the Toledo Bend species would become the last known North American representative of the order. Key Words: Ekgmowechashala; Primates; Plagiomenidae; Texas Gulf Coastal Plain; Arikareean INTRODUCTION brate paleontology collections of the Louisiana State Uni- In 1990, while screen-washing matrix from the “middle” versity Museum of Geoscience (LSUMG V). Arikareean Toledo Bend site in the Fleming Formation of easternmost Texas (Albright 1994, 1996, 1998a, 1998b, BACKGROUND 1999), a small, unusual, water-worn tooth was recov- Ekgmowechashala philotau is a small “enigmatic late ered that differed considerably from the site’s more com- Oligocene mammal” (McKenna, 1990:226) heretofore mon and readily identifiable rodent teeth. -
University of Florida Thesis Or Dissertation Formatting
UNDERSTANDING CARNIVORAN ECOMORPHOLOGY THROUGH DEEP TIME, WITH A CASE STUDY DURING THE CAT-GAP OF FLORIDA By SHARON ELIZABETH HOLTE A DISSERTATION PRESENTED TO THE GRADUATE SCHOOL OF THE UNIVERSITY OF FLORIDA IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY UNIVERSITY OF FLORIDA 2018 © 2018 Sharon Elizabeth Holte To Dr. Larry, thank you ACKNOWLEDGMENTS I would like to thank my family for encouraging me to pursue my interests. They have always believed in me and never doubted that I would reach my goals. I am eternally grateful to my mentors, Dr. Jim Mead and the late Dr. Larry Agenbroad, who have shaped me as a paleontologist and have provided me to the strength and knowledge to continue to grow as a scientist. I would like to thank my colleagues from the Florida Museum of Natural History who provided insight and open discussion on my research. In particular, I would like to thank Dr. Aldo Rincon for his help in researching procyonids. I am so grateful to Dr. Anne-Claire Fabre; without her understanding of R and knowledge of 3D morphometrics this project would have been an immense struggle. I would also to thank Rachel Short for the late-night work sessions and discussions. I am extremely grateful to my advisor Dr. David Steadman for his comments, feedback, and guidance through my time here at the University of Florida. I also thank my committee, Dr. Bruce MacFadden, Dr. Jon Bloch, Dr. Elizabeth Screaton, for their feedback and encouragement. I am grateful to the geosciences department at East Tennessee State University, the American Museum of Natural History, and the Museum of Comparative Zoology at Harvard for the loans of specimens. -
An Early Miocene Dome-Skulled Chalicothere
PUBLISHED BY THE AMERICAN MUSEUM OF NATURAL HISTORY CENTRAL PARK WEST AT 79TH STREET, NEW YORK, NY 10024 Number 3486, 45 pp., 26 ®gures, 8 tables October 27, 2005 An Early Miocene Dome-Skulled Chalicothere from the ``Arikaree'' Conglomerates of Darton: Calibrating the Ages of High Plains Paleovalleys Against Rocky Mountain Tectonism ROBERT M. HUNT, JR.1 CONTENTS Abstract ....................................................................... 2 Introduction .................................................................... 2 Geologic Setting ................................................................ 3 Systematic Paleontology ........................................................ 12 Age of the Dome-Skulled Chalicothere ........................................... 28 The ``Arikaree'' Conglomerates of N.H. Darton ................................... 32 Post-Laramide Evolution of the Rocky Mountains ................................. 39 Acknowledgments ............................................................. 42 References .................................................................... 42 1 Department of Geosciences, W436 Nebraska Hall, University of Nebraska, Lincoln, NE 68588-0549 ([email protected]). Copyright q American Museum of Natural History 2005 ISSN 0003-0082 2 AMERICAN MUSEUM NOVITATES NO. 3486 ABSTRACT Fragmentary skeletal remains discovered in 1979 in southeastern Wyoming, associated with a mammalian fauna of early Hemingfordian age (;18.2 to 18.8 Ma), represent the oldest known occurrence of dome-skulled chalicotheres -
PHYLOGENETIC SYSTEMATICS of the BOROPHAGINAE (CARNIVORA: CANIDAE) Xiaoming Wang
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Mammalogy Papers: University of Nebraska State Museum, University of Nebraska State Museum 1999 PHYLOGENETIC SYSTEMATICS OF THE BOROPHAGINAE (CARNIVORA: CANIDAE) Xiaoming Wang Richard H. Tedford Beryl E. Taylor Follow this and additional works at: http://digitalcommons.unl.edu/museummammalogy This Article is brought to you for free and open access by the Museum, University of Nebraska State at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Mammalogy Papers: University of Nebraska State Museum by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. PHYLOGENETIC SYSTEMATICS OF THE BOROPHAGINAE (CARNIVORA: CANIDAE) XIAOMING WANG Research Associate, Division of Paleontology American Museum of Natural History and Department of Biology, Long Island University, C. W. Post Campus, 720 Northern Blvd., Brookville, New York 11548 -1300 RICHARD H. TEDFORD Curator, Division of Paleontology American Museum of Natural History BERYL E. TAYLOR Curator Emeritus, Division of Paleontology American Museum of Natural History BULLETIN OF THE AMERICAN MUSEUM OF NATURAL HISTORY Number 243, 391 pages, 147 figures, 2 tables, 3 appendices Issued November 17, 1999 Price: $32.00 a copy Copyright O American Museum of Natural History 1999 ISSN 0003-0090 AMNH BULLETIN Monday Oct 04 02:19 PM 1999 amnb 99111 Mp 2 Allen Press • DTPro System File # 01acc (large individual, composite figure, based Epicyon haydeni ´n. (small individual, based on AMNH 8305) and Epicyon saevus Reconstruction of on specimens from JackNorth Swayze America. Quarry). Illustration These by two Mauricio species Anto co-occur extensively during the late Clarendonian and early Hemphillian of western 2 1999 WANG ET AL.: SYSTEMATICS OF BOROPHAGINAE 3 CONTENTS Abstract .................................................................... -
Agate Fossil Beds
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln U.S. National Park Service Publications and Papers National Park Service 1980 Agate Fossil Beds Follow this and additional works at: http://digitalcommons.unl.edu/natlpark "Agate Fossil Beds" (1980). U.S. National Park Service Publications and Papers. 160. http://digitalcommons.unl.edu/natlpark/160 This Article is brought to you for free and open access by the National Park Service at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in U.S. National Park Service Publications and Papers by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. Agate Fossil Beds cap. tfs*Af Clemson Universit A *?* jfcti *JpRPP* - - - . Agate Fossil Beds Agate Fossil Beds National Monument Nebraska Produced by the Division of Publications National Park Service U.S. Department of the Interior Washington, D.C. 1980 — — The National Park Handbook Series National Park Handbooks, compact introductions to the great natural and historic places adminis- tered by the National Park Service, are designed to promote understanding and enjoyment of the parks. Each is intended to be informative reading and a useful guide before, during, and after a park visit. More than 100 titles are in print. This is Handbook 107. You may purchase the handbooks through the mail by writing to Superintendent of Documents, U.S. Government Printing Office, Washington DC 20402. About This Book What was life like in North America 21 million years ago? Agate Fossil Beds provides a glimpse of that time, long before the arrival of man, when now-extinct creatures roamed the land which we know today as Nebraska.