JOHNS HOPKINS UNIVERSITY PRESS Fall / Winter 2017 Sharktooth Hill Community Key to Image on Pages 2 and 3
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Isthminia Panamensis, a New Fossil Inioid (Mammalia, Cetacea) from the Chagres Formation of Panama and the Evolution of ‘River Dolphins’ in the Americas
Isthminia panamensis, a new fossil inioid (Mammalia, Cetacea) from the Chagres Formation of Panama and the evolution of ‘river dolphins’ in the Americas Nicholas D. Pyenson1,2, Jorge Velez-Juarbe´ 3,4, Carolina S. Gutstein1,5, Holly Little1, Dioselina Vigil6 and Aaron O’Dea6 1 Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, DC, USA 2 Departments of Mammalogy and Paleontology, Burke Museum of Natural History and Culture, Seattle, WA, USA 3 Department of Mammalogy, Natural History Museum of Los Angeles County, Los Angeles, CA, USA 4 Florida Museum of Natural History, University of Florida, Gainesville, FL, USA 5 Comision´ de Patrimonio Natural, Consejo de Monumentos Nacionales, Santiago, Chile 6 Smithsonian Tropical Research Institute, Balboa, Republic of Panama ABSTRACT In contrast to dominant mode of ecological transition in the evolution of marine mammals, different lineages of toothed whales (Odontoceti) have repeatedly invaded freshwater ecosystems during the Cenozoic era. The so-called ‘river dolphins’ are now recognized as independent lineages that converged on similar morphological specializations (e.g., longirostry). In South America, the two endemic ‘river dolphin’ lineages form a clade (Inioidea), with closely related fossil inioids from marine rock units in the South Pacific and North Atlantic oceans. Here we describe a new genus and species of fossil inioid, Isthminia panamensis, gen. et sp. nov. from the late Miocene of Panama. The type and only known specimen consists of a partial skull, mandibles, isolated teeth, a right scapula, and carpal elements recovered from Submitted 27 April 2015 the Pina˜ Facies of the Chagres Formation, along the Caribbean coast of Panama. -
Download Full Article in PDF Format
A new marine vertebrate assemblage from the Late Neogene Purisima Formation in Central California, part II: Pinnipeds and Cetaceans Robert W. BOESSENECKER Department of Geology, University of Otago, 360 Leith Walk, P.O. Box 56, Dunedin, 9054 (New Zealand) and Department of Earth Sciences, Montana State University 200 Traphagen Hall, Bozeman, MT, 59715 (USA) and University of California Museum of Paleontology 1101 Valley Life Sciences Building, Berkeley, CA, 94720 (USA) [email protected] Boessenecker R. W. 2013. — A new marine vertebrate assemblage from the Late Neogene Purisima Formation in Central California, part II: Pinnipeds and Cetaceans. Geodiversitas 35 (4): 815-940. http://dx.doi.org/g2013n4a5 ABSTRACT e newly discovered Upper Miocene to Upper Pliocene San Gregorio assem- blage of the Purisima Formation in Central California has yielded a diverse collection of 34 marine vertebrate taxa, including eight sharks, two bony fish, three marine birds (described in a previous study), and 21 marine mammals. Pinnipeds include the walrus Dusignathus sp., cf. D. seftoni, the fur seal Cal- lorhinus sp., cf. C. gilmorei, and indeterminate otariid bones. Baleen whales include dwarf mysticetes (Herpetocetus bramblei Whitmore & Barnes, 2008, Herpetocetus sp.), two right whales (cf. Eubalaena sp. 1, cf. Eubalaena sp. 2), at least three balaenopterids (“Balaenoptera” cortesi “var.” portisi Sacco, 1890, cf. Balaenoptera, Balaenopteridae gen. et sp. indet.) and a new species of rorqual (Balaenoptera bertae n. sp.) that exhibits a number of derived features that place it within the genus Balaenoptera. is new species of Balaenoptera is relatively small (estimated 61 cm bizygomatic width) and exhibits a comparatively nar- row vertex, an obliquely (but precipitously) sloping frontal adjacent to vertex, anteriorly directed and short zygomatic processes, and squamosal creases. -
Evolution of River Dolphins Healy Hamilton1*, Susana Caballero2, Allen G
doi 10.1098/rspb.2000.1385 Evolution of river dolphins Healy Hamilton1*, Susana Caballero2, Allen G. Collins1 and Robert L. Brownell Jr3 1Museum of Paleontology and Department of Integrative Biology, University of California, Berkeley, CA 94720, USA 2Fundacio¨ nYubarta, Carrara 24F oeste, no 3-110, Cali, Colombia 3Southwest Fisheries Science Center, PO Box 271, LaJolla, CA 92038, USA The world’s river dolphins (Inia, Pontoporia, Lipotes and Platanista) are among the least known and most endangered of all cetaceans. The four extant genera inhabit geographically disjunct river systems and exhibit highly modi¢ed morphologies, leading many cetologists to regard river dolphins as an unnatural group. Numerous arrangements have been proposed for their phylogenetic relationships to one another and to other odontocete cetaceans. These alternative views strongly a¡ect the biogeographical and evolu- tionary implications raised by the important, although limited, fossil record of river dolphins. We present a hypothesis of river dolphin relationships based on phylogenetic analysis of three mitochondrial genes for 29 cetacean species, concluding that the four genera represent three separate, ancient branches in odonto- cete evolution. Our molecular phylogeny corresponds well with the ¢rst fossil appearances of the primary lineages of modern odontocetes. Integrating relevant events in Tertiary palaeoceanography, we develop a scenario for river dolphin evolution during the globally high sea levels of the Middle Miocene. We suggest that ancestors of the four extant river dolphin lineages colonized the shallow epicontinental seas that inun- dated the Amazon, Parana¨ , Yangtze and Indo-Gangetic river basins, subsequently remaining in these extensive waterways during their transition to freshwater with the Late Neogene trend of sea-level lowering. -
The Biology of Marine Mammals
Romero, A. 2009. The Biology of Marine Mammals. The Biology of Marine Mammals Aldemaro Romero, Ph.D. Arkansas State University Jonesboro, AR 2009 2 INTRODUCTION Dear students, 3 Chapter 1 Introduction to Marine Mammals 1.1. Overture Humans have always been fascinated with marine mammals. These creatures have been the basis of mythical tales since Antiquity. For centuries naturalists classified them as fish. Today they are symbols of the environmental movement as well as the source of heated controversies: whether we are dealing with the clubbing pub seals in the Arctic or whaling by industrialized nations, marine mammals continue to be a hot issue in science, politics, economics, and ethics. But if we want to better understand these issues, we need to learn more about marine mammal biology. The problem is that, despite increased research efforts, only in the last two decades we have made significant progress in learning about these creatures. And yet, that knowledge is largely limited to a handful of species because they are either relatively easy to observe in nature or because they can be studied in captivity. Still, because of television documentaries, ‘coffee-table’ books, displays in many aquaria around the world, and a growing whale and dolphin watching industry, people believe that they have a certain familiarity with many species of marine mammals (for more on the relationship between humans and marine mammals such as whales, see Ellis 1991, Forestell 2002). As late as 2002, a new species of beaked whale was being reported (Delbout et al. 2002), in 2003 a new species of baleen whale was described (Wada et al. -
Geology and Paleontology of the Late Miocene Wilson Grove Formation at Bloomfield Quarry, Sonoma County, California
Geology and Paleontology of the Late Miocene Wilson Grove Formation at Bloomfield Quarry, Sonoma County, California 2 cm 2 cm Scientific Investigations Report 2019–5021 U.S. Department of the Interior U.S. Geological Survey COVER. Photographs of fragments of a walrus (Gomphotaria pugnax Barnes and Raschke, 1991) mandible from the basal Wilson Grove Formation exposed in Bloomfield Quarry, just north of the town of Bloomfield in Sonoma County, California (see plate 8 for more details). The walrus fauna at Bloomfield Quarry is the most diverse assemblage of walrus yet reported worldwide from a single locality. cm, centimeter. (Photographs by Robert Boessenecker, College of Charleston.) Geology and Paleontology of the Late Miocene Wilson Grove Formation at Bloomfield Quarry, Sonoma County, California By Charles L. Powell II, Robert W. Boessenecker, N. Adam Smith, Robert J. Fleck, Sandra J. Carlson, James R. Allen, Douglas J. Long, Andrei M. Sarna-Wojcicki, and Raj B. Guruswami-Naidu Scientific Investigations Report 2019–5021 U.S. Department of the Interior U.S. Geological Survey U.S. Department of the Interior DAVID BERNHARDT, Secretary U.S. Geological Survey James F. Reilly II, Director U.S. Geological Survey, Reston, Virginia: 2019 For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment—visit https://www.usgs.gov/ or call 1–888–ASK–USGS (1–888–275–8747). For an overview of USGS information products, including maps, imagery, and publications, visit https://store.usgs.gov/. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. -
PROGRAM the 11Th International Congress of Vertebrate Morphology
PROGRAM The 11th International Congress of Vertebrate Morphology 29 June – 3 July 2016 Bethesda North Marriott Hotel & Conference Center Washington, DC CONTENTS Welcome to ICVM 11 ........................ 5 Note from The Anatomical Record........... 7 Administration ............................. 9 Previous Locations of ICVM ................. 10 General Information ........................ .11 Sponsors .................................. 14 Program at-a-Glance ....................... 16 Exhibitor Listing............................ 18 Program ................................... 19 Wednesday 29th June, 2016 ................... .19 Thursday 30th June, 2016 ..................... 22 Friday 1st July, 2016 ........................... 34 Saturday 2nd July, 2016 ....................... 44 Sunday 3rd July, 2016 ......................... 52 Hotel Floor Plan ................... Back Cover Program 3 Journal of Experimental Biology (JEB)(JEB) isis atat thethe forefrontforefront ofof comparaticomparativeve physiolophysiologygy and integrative biolobiology.gy. We publish papers on the form and function of living ororganismsganisms at all levels of biological organisation and cover a didiverseverse array of elds,fields, including: • Biochemical physiology •I• Invertebratenvertebrate and vertebrate physiology • Biomechanics • Neurobiology and neuroethology • Cardiovascular physiology • Respiratory physiology • Ecological and evolutionary physiology • Sensory physiology Article types include ReseaResearchrch Articles, Methods & TeTechniques,chniques, ShoShortrt -
Mammalia: Cetacea) from the Chagres Formation of Panama and the Evolution of "River Dolphins" in the Americas
Reviewing Manuscript To avoid issues relating to nomenclatural acts, minor sections of this article which reported on the naming of a new species, and which did not make it into the final publication, have been redacted. a new fossil inioid (Mammalia: Cetacea) from the Chagres Formation of Panama and the evolution of "river dolphins" in the Americas Nicholas D Pyenson, Jorge Velez-Juarbe, Carolina S. Gutstein, Holly Little, Dioselina I Vigil, Aaron O'Dea In contrast to dominant mode of ecological transition in the evolution of marine mammals, different lineages of toothed whales (Odontoceti) have repeatedly invaded freshwater ecosystems during the Cenozoic era. The so-called “river dolphins” are now recognized as independent lineages that converged on similar morphological specializations (e.g., longirostry). In South America, the two endemic “river dolphin” lineages form a clade (Inioidea), with closely related fossil inioids from marine rock units in the South Pacific and North Atlantic Oceans. Here we describe a new species of fossil inioid, nov. gen., nov. sp., from the late Miocene of Panama. The type and only known specimen consists of a partial skull, mandibles, isolated teeth, and a right scapula recovered from the Piña facies of the Chagres Formation, along the Caribbean coast of Panama. Sedimentological and associated fauna from the Piña facies point to fully marine conditions with high planktonic productivity 6.8-7.5 million years ago (middle Messinian to earliest Tortonian), which predates final closure of the Isthmus of Panama. Along with ecomorphological data, we propose that was primarily a marine inhabitant, similar to modern oceanic delphinoids. -
A Supermatrix Analysis of Genomic, Morphological, and Paleontological Data from Crown Cetacea
UC Riverside UC Riverside Previously Published Works Title A supermatrix analysis of genomic, morphological, and paleontological data from crown Cetacea Permalink https://escholarship.org/uc/item/5qp747jj Journal BMC Evolutionary Biology, 11(1) ISSN 1471-2148 Authors Geisler, Jonathan H McGowen, Michael R Yang, Guang et al. Publication Date 2011-04-25 DOI http://dx.doi.org/10.1186/1471-2148-11-112 Supplemental Material https://escholarship.org/uc/item/5qp747jj#supplemental Peer reviewed eScholarship.org Powered by the California Digital Library University of California Geisler et al. BMC Evolutionary Biology 2011, 11:112 http://www.biomedcentral.com/1471-2148/11/112 RESEARCHARTICLE Open Access A supermatrix analysis of genomic, morphological, and paleontological data from crown Cetacea Jonathan H Geisler1*, Michael R McGowen2,3, Guang Yang4 and John Gatesy2 Abstract Background: Cetacea (dolphins, porpoises, and whales) is a clade of aquatic species that includes the most massive, deepest diving, and largest brained mammals. Understanding the temporal pattern of diversification in the group as well as the evolution of cetacean anatomy and behavior requires a robust and well-resolved phylogenetic hypothesis. Although a large body of molecular data has accumulated over the past 20 years, DNA sequences of cetaceans have not been directly integrated with the rich, cetacean fossil record to reconcile discrepancies among molecular and morphological characters. Results: We combined new nuclear DNA sequences, including segments of six genes (~2800 basepairs) from the functionally extinct Yangtze River dolphin, with an expanded morphological matrix and published genomic data. Diverse analyses of these data resolved the relationships of 74 taxa that represent all extant families and 11 extinct families of Cetacea. -
Evolution of Aquatic Tetrapods
Evolution of Aquatic Tetrapods Fourth Triannual Convention Abstracts Akron, Ohio, U.S.A., May 16-20, 2005 Cranbrook Institute of Science Miscellaneous Publications, Volume 1 Edited by Mark D. Uhen EAT Conference organized by: J.G.M. “Hans” Thewissen, Northeastern Ohio Universities College of Medicine, Rootstown OH Sandra I. Madar, Hiram College, Hiram, OH Frank Fish, West Chester University, West Chester, PA Mark D. Uhen, Cranbrook Institute of Science, Bloomfield Hills, MI Published by the Cranbrook Institute of Science: ISBN 0-87737-045-1 CONTENTS PETER J. ADAM EVOLUTION OF THE CARNIVOROUS MARINE MAMMAL FEEDING GUILD: A PRELIMINARY OVERVIEW. 1 SUNIL BAJPAI AND J. G. M. THEWISSEN AGES OF THE WHALE-BEARING STRATA IN THE EOCENE OF INDIA: TIMING OF THE ORIGIN OF WHALES 3 LAWRENCE G. BARNES EVOLUTIONARY PATTERNS AMONG THE OTARIOID PINNIPEDS (MAMMALIA: CARNIVORA). 5 LAWRENCE G. BARNES, NICHOLAS D. PYENSON AND SAMUEL A. MCLEOD MIDDLE MIOCENE MARINE ECOSYSTEMS AND CETACEAN DIVERSITY AS EXEMPLIFIED BY THE SHARKTOOTH HILL BONEBED, CALIFORNIA, USA 6 BRIAN LEE BEATTY DENTAL MICROWEAR IN AQUATIC VERTEBRATES: CONSTRAINTS, OPPORTUNITIES AND PRELIMINARY RESULTS FOR SELECTED MARINE MAMMALS 8 ANNALISA BERTA AND THOMAS A. DEMÉRÉ PHYLOGENETIC RELATIONSHIPS AMONG THE DIVERSE TOOTHED MYSTICETE CLADE THE AETIOCETIDAE AND RECONSIDERATION OF THE FILTER FEEDING NICHE 9 VIRGINIE BOUETEL PHYLOGENETIC IMPLICATIONS OF SKULL STRUCTURE AND FEEDING BEHAVIOUR IN BALAENOPTERIDAE (CETACEA, MYSTICETI) 10 EMILY A. BUCHHOLTZ AND ELIZABETH M. WOLKOVICH COMPLEXITY IN DELPHINOID EVOLUTION 11 MICHAEL W. CALDWELL HISTOLOGY OF TOOTH ATTACHMENT AND TOOTH REPLACEMENT PATTERNS IN MOSASAURS: WHAT IS THECODONTY ANYHOW? 13 MICHAEL W. CALDWELL, ALEXANDER DUTCHAK AND TAKUYA KONISHI MIDDLE EAR ANATOMY IN UPPER CRETACEOUS MOSASAURS (SQUAMATA): FROM IMPEDANCE MATCHING TO UNDERWATER HEARING 14 CARRIE A. -
Paleobios 33:1-7, August 16, 2016 Paleobios
PaleoBios 33:1-7, August 16, 2016 PaleoBios OFFICIAL PUBLICATION OF THE UNIVERSITY OF CALIFORNIA MUSEUM OF PALEONTOLOGY Boessenecker, Robert W. (2016). First record of the megatoothed shark Carcharocles megalodon from the Mio-Pliocene Purisima Formation of Northern California. Cover photo: The only known specimen of the megatoothed shark Carcharocles megalodon from the basal Purisima Formation (late Miocene) near Santa Cruz, California. Citation: Boessenecker, Robert W. 2016. First record of the megatoothed shark Carcharocles megalodon from the Mio-Pliocene Purisima Forma- tion of Northern California. PaleoBios, 33. ucmp_paleobios_32076 First record of the megatoothed shark Carcharocles megalodon from the Mio-Pliocene Purisima Formation of Northern California ROBERT W. BOESSENECKER1,2 1Department of Geology and Environmental Geosciences, College of Charleston, Charleston, SC 29424; [email protected] 2University of California Museum of Paleontology, University of California, Berkeley, CA 94720 Megatoothed sharks (Family: Otodontidae) are among the most widely reported sharks in Cenozoic marine sedi- ments worldwide, and certain species such as the famed Carcharocles megalodon are particularly abundant in Neogene deposits on the Atlantic margin of the United States. Cenozoic marine strata on the Pacific margin of North America have yielded one of the most densely sampled marine vertebrate records anywhere, but published occurrences of shark assemblages are uncommon. Rarer yet are published occurrences of C. megalodon from this region with unambiguous provenance and robust age control — critical data required for the study of recent marine vertebrate faunal evolution in the eastern North Pacific. A tooth ofC. megalodon from near Santa Cruz, California, represents the first record of this species from the Purisima Formation and the geochronologically youngest occurrence (6.9–5.6 Ma, uppermost Miocene; late Messinian) of this species from northern California. -
Evolution of River Dolphins Healy Hamilton'*, Susana Caballero^, Allen G
THE ROYAL fl'oH0.1098/rspb.2000.1385 SOCIETY Evolution of river dolphins Healy Hamilton'*, Susana Caballero^, Allen G. Collins' and Robert L. Brownell Jr^ ^Museum of Paleontology and Department of Integrative Biology, University of California, Berkeley, CA 94720, USA ^Fundacion Tubarta, Carrara 24Foeste, no 3-110, C'ali, Colombia '^Southwest Fisheries Science Center, PO Box 271, Lajolla, CA 92038, USA The world's river dolphins [Inia, Pontoporia, Lipotes and Platanista) are among the least known and most endangered of all cetaceans. The four extant genera inhabit geographically disjunct river systems and exhibit highly modified morphologies, leading many cetologists to regard river dolphins as an unnatural group. Numerous arrangements have been proposed for their phylogenetic relationships to one another and to other odontocete cetaceans. These alternative views strongly affect the biogeographical and evolu- tionary implications raised by the important, although limited, fossil record of river dolphins. We present a hypothesis of river dolphin relationships based on phylogenetic analysis of three mitochondrial genes for 29 cetacean species, concluding that the four genera represent three separate, ancient branches in odonto- cete evolution. Our molecular phylogeny corresponds well with the first fossil appearances of the primary lineages of modern odontocetes. Integrating relevant events in Tertiary palaeoceanography, we develop a scenario for river dolphin evolution during the globally high sea levels of the Middle Miocene. We suggest that ancestors of the four extant river dolphin lineages colonized the shallow epicontinental seas that inun- dated the Amazon, Parana, Yangtze and Indo-Gangetic river basins, subsequently remaining in these extensive waterways during their transition to freshwater with the Late Neogene trend of sea-level lowering. -
Marine Mammal Research and Conservation in China
244 Marine mammal research and conservation in China KAIYAZHOU College of Life Sciences, Nanjing Normal University, 122 Ninghai Road, Nanjing 210097, China ([email protected]) SUMMARY: Forty species of marine mammals have been reported from Chinese waters. Studies on systematics and taxonomy, morphology, and conservation biology of Chinese marine mammals are briefly reviewed. Brief accounts of systematic and taxonomic studies on Lipotes, Neophocaena, Tursiops , Sousa and Delphinus are included. Studies of gene sequences of Lipotes and other river dolphins in recent years support ranking Lipotidae as a family. The studies of structure and function were mainly on Lipotes and Neophocaena. The researches on conservation biology of Lipotes, Neophocaena, Sousa and other marine mammals in the past decades have provided scientific bases for conservation actions, Natural reserves for Lipotes and Neophocaena, Sousa, Dugong and Phoca largha were established. KEY WORDS: Marine mammals, Research and conservation, China INTRODUCTION indicated that non-platanistid river dolphins, Lipotes, China is bordered by the Bohai, Yellow, East China Inia and Pontoporia, are the extant representatives of and South China Seas. The extensive coastal waters early lineages that diverged from the stem leading to of China are inhabited by a large number of marine delphinoids, supporting their ranking as separate mammals. The Chinese marine mammals include families. 8-11)Therefore, Lipotidae should be ranked representatives in three mammalian orders.1) The as a family rather as a subfamily of Pontoporiidae. cetacean fauna contains 9 of the world's 14 cetacean Three populations of the finless porpoise families and 25 of the 40 genera, among which (Neophocaena phocaenoides) are recognized in Lipotidae is endemic.