Palaeoenvironmental and Faunal Inferences Based on the Avian Fossil Record of Patagonia and Pampa: What Works and What Does Not
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Chronostratigraphy of the Mammal-Bearing Paleocene of South America 51
Thierry SEMPERE biblioteca Y. Joirriiol ofSoiiih Ainorirari Euirli Sciriin~r.Hit. 111. No. 1, pp. 49-70, 1997 Pergamon Q 1‘197 PublisIlcd hy Elscvicr Scicncc Ltd All rights rescrvcd. Printed in Grcnt nrilsin PII: S0895-9811(97)00005-9 0895-9X 11/97 t I7.ol) t o.(x) -. ‘Inshute qfI Human Origins, 1288 9th Street, Berkeley, California 94710, USA ’Orstom, 13 rue Geoffroy l’Angevin, 75004 Paris, France 3Department of Geosciences, The University of Arizona, Tucson, Arizona 85721, USA Absfract - Land mammal faunas of Paleocene age in the southern Andean basin of Bolivia and NW Argentina are calibrated by regional sequence stratigraphy and rnagnetostratigraphy. The local fauna from Tiupampa in Bolivia is -59.0 Ma, and is thus early Late Paleocene in age. Taxa from the lower part of the Lumbrera Formation in NW Argentina (long regarded as Early Eocene) are between -58.0-55.5 Ma, and thus Late Paleocene in age. A reassessment of the ages of local faunas from lhe Rfo Chico Formation in the San Jorge basin, Patagonia, southern Argentina, shows that lhe local fauna from the Banco Negro Infeiior is -60.0 Ma, mak- ing this the most ancient Cenozoic mammal fauna in South,America. Critical reevaluation the ltaboraí fauna and associated or All geology in SE Brazil favors lhe interpretation that it accumulated during a sea-level lowsland between -$8.2-56.5 Ma. known South American Paleocene land inammal faunas are thus between 60.0 and 55.5 Ma (i.e. Late Paleocene) and are here assigned to the Riochican Land Maminal Age, with four subages (from oldest to youngest: Peligrian, Tiupampian, Ilaboraian, Riochican S.S.). -
Researchers Document Aviary Eggshell with Iridescence for the First Time 10 December 2014, by Bob Yirka
Researchers document aviary eggshell with iridescence for the first time 10 December 2014, by Bob Yirka they found to be made of calcium phosphate, calcium carbonate, and some other yet to be identified organic compounds) which gave the egg its glossy sheen. When they removed the cuticle from a portion of an egg sample—they found that it was blue underneath, but that the iridescence was gone. Thus, they concluded that the iridescent blue was due to a combination of the pigment and Photographs (a–c) of T. major, E. elegans and N. cuticle. maculosa nests. Average length breadth of eggs (a–c): 58 48 mm, 53 39 mm and 40 29 mm. Photo credits: The researchers can't say for sure why the bird Karsten Thomsen, Sam Houston and Shirley eggs have such features as they would appear to Sekarajasingham. Journal of the Royal Society Interface, draw attention to them, rather than help keep them Published 10 December 2014 . DOI: 10.1098/rsif.2014.1210 hidden. It seems possible that the iridescence actually causes the eggs to be more difficult to see in their particular environment to a particular type of prey. More likely, the researchers suggest is that (Phys.org)—A team of researchers with members eggs that stand out can be more easily spotted or from New Zealand, Czech Republic and the U.S. differentiated from other eggs from birds of the has documented for the first time an example of an same species, which could serve as a means of aviary egg that has iridescence. In their paper encouraging males to assist with incubation. -
Eudromia Formosa)
ISSN 0326-1778 y ISSN 1853-6581 HISTORIA NATURAL Tercera Serie Volumen 6 (1) 2016/25-39 NOTAS ECOLÓGICAS SOBRE LA MARTINETA CHAQUEÑA (Eudromia formosa) Ecological notes on the Quebracho crested tinamou (Eudromia formosa) Rebeca Lobo Allende1 y Patricia Capllonch2 1Universidad Nacional de Chilecito, Campus Los Sarmientos, Ruta Los Peregrinos s/n (F5360CKB) Los Sarmientos, Chilecito, La Rioja, Argentina. [email protected] 2Cátedra de Biornitología Argentina y Centro Nacional de Anillado de Aves (CENAA), Facultad de Ciencias Naturales e Instituto Miguel Lillo, Universidad Nacional de Tucumán, Miguel Lillo 205 (4000) Tucumán, Argentina. [email protected] HISTORIA NATURAL Tercera Serie Volumen 6 (1) 2016/13-24 25 LOBO ALLENDE R. Y CAPLLONCH P. Resumen. Estudiamos el uso del hábitat de la Martineta Chaqueña (Eudromia formosa) en el oeste de la provincia de Santiago del Estero, Argentina. Realizamos 202 censos (34 otoño e invierno 2002, 36 primavera 2002, 71 verano 2002-2003, 33 otoño e invierno 2003, 10 verano 2004 y 18 otoño e invierno 2004). El éxito de muestreo (al menos un individuo por muestra) fue del 72%. Encontramos 12 individuos en 1000 hectáreas durante la época no reproductiva distribuidos en 5 grupos y 22 individuos a fines de enero (época reproductiva). A diferencia deE. elegans, los grupos eran de no más de 4 individuos, generalmente de 3. Cada grupo en sus aproximadas 200 ha de territorio recorren las sendas lentamente mientras buscan alimento. Prefieren el bosque de quebrachos y algarrobos pero usan también otros ambientes, además penetran en los campos cultivados en busca de insectos. A fines de la primavera y comienzos del verano, en concordancia con la llegada de las lluvias, aumentó un 80% el número de individuos y se observó que a los residentes se unieron individuos de áreas vecinas. -
A Phylogeny and Timescale for Marsupial Evolution Based on Sequences for Five Nuclear Genes
J Mammal Evol DOI 10.1007/s10914-007-9062-6 ORIGINAL PAPER A Phylogeny and Timescale for Marsupial Evolution Based on Sequences for Five Nuclear Genes Robert W. Meredith & Michael Westerman & Judd A. Case & Mark S. Springer # Springer Science + Business Media, LLC 2007 Abstract Even though marsupials are taxonomically less diverse than placentals, they exhibit comparable morphological and ecological diversity. However, much of their fossil record is thought to be missing, particularly for the Australasian groups. The more than 330 living species of marsupials are grouped into three American (Didelphimorphia, Microbiotheria, and Paucituberculata) and four Australasian (Dasyuromorphia, Diprotodontia, Notoryctemorphia, and Peramelemorphia) orders. Interordinal relationships have been investigated using a wide range of methods that have often yielded contradictory results. Much of the controversy has focused on the placement of Dromiciops gliroides (Microbiotheria). Studies either support a sister-taxon relationship to a monophyletic Australasian clade or a nested position within the Australasian radiation. Familial relationships within the Diprotodontia have also proved difficult to resolve. Here, we examine higher-level marsupial relationships using a nuclear multigene molecular data set representing all living orders. Protein-coding portions of ApoB, BRCA1, IRBP, Rag1, and vWF were analyzed using maximum parsimony, maximum likelihood, and Bayesian methods. Two different Bayesian relaxed molecular clock methods were employed to construct a timescale for marsupial evolution and estimate the unrepresented basal branch length (UBBL). Maximum likelihood and Bayesian results suggest that the root of the marsupial tree is between Didelphimorphia and all other marsupials. All methods provide strong support for the monophyly of Australidelphia. Within Australidelphia, Dromiciops is the sister-taxon to a monophyletic Australasian clade. -
Functional Relationship Between Skull Form and Feeding Mechanics in Sphenodon, and Implications for Diapsid Skull Development
Functional Relationship between Skull Form and Feeding Mechanics in Sphenodon, and Implications for Diapsid Skull Development Neil Curtis1*, Marc E. H. Jones2, Junfen Shi1, Paul O’Higgins3, Susan E. Evans2, Michael J. Fagan1 1 Medical and Biological Engineering Research Group, Department of Engineering, University of Hull, Hull, United Kingdom, 2 Research Department of Cell and Developmental Biology, University College London, London, United Kingdom, 3 Hull-York Medical School, University of York, York, United Kingdom Abstract The vertebrate skull evolved to protect the brain and sense organs, but with the appearance of jaws and associated forces there was a remarkable structural diversification. This suggests that the evolution of skull form may be linked to these forces, but an important area of debate is whether bone in the skull is minimised with respect to these forces, or whether skulls are mechanically ‘‘over-designed’’ and constrained by phylogeny and development. Mechanical analysis of diapsid reptile skulls could shed light on this longstanding debate. Compared to those of mammals, the skulls of many extant and extinct diapsids comprise an open framework of fenestrae (window-like openings) separated by bony struts (e.g., lizards, tuatara, dinosaurs and crocodiles), a cranial form thought to be strongly linked to feeding forces. We investigated this link by utilising the powerful engineering approach of multibody dynamics analysis to predict the physiological forces acting on the skull of the diapsid reptile Sphenodon. We then ran a series of structural finite element analyses to assess the correlation between bone strain and skull form. With comprehensive loading we found that the distribution of peak von Mises strains was particularly uniform throughout the skull, although specific regions were dominated by tensile strains while others were dominated by compressive strains. -
Mammalia: Carnivora) in the Americas: Past to Present
Journal of Mammalian Evolution https://doi.org/10.1007/s10914-020-09496-8 ORIGINAL PAPER Environmental Drivers and Distribution Patterns of Carnivoran Assemblages (Mammalia: Carnivora) in the Americas: Past to Present Andrés Arias-Alzate1,2 & José F. González-Maya3 & Joaquín Arroyo-Cabrales4 & Rodrigo A. Medellín5 & Enrique Martínez-Meyer2 # Springer Science+Business Media, LLC, part of Springer Nature 2020 Abstract Understanding species distributions and the variation of assemblage structure in time and space are fundamental goals of biogeography and ecology. Here, we use an ecological niche modeling and macroecological approach in order to assess whether constraints patterns in carnivoran richness and composition structures in replicated assemblages through time and space should reflect environmental filtering through ecological niche constraints from the Last Inter-glacial (LIG), Last Glacial Maximum (LGM) to the present (C) time. Our results suggest a diverse distribution of carnivoran co-occurrence patterns at the continental scale as a result of spatial climatic variation as an important driver constrained by the ecological niches of the species. This influence was an important factor restructuring assemblages (more directly on richness than composition patterns) not only at the continental level, but also from regional and local scales and this influence was geographically different throughout the space in the continent. These climatic restrictions and disruption of the niche during the environmental changes at the LIG-LGM-C transition show a considerable shift in assemblage richness and composition across the Americas, which suggests an environ- mental filtering mainly during the LGM, explaining between 30 and 75% of these variations through space and time, with more accentuated changes in North than South America. -
Análisis Litoestratigráfico De La Formación Cerro Azul (Mioceno Superior) En La Provincia De La Pampa
Revista de la Asociación Geológica Argentina 67 (2): 257 - 265 (2010) 257 ANÁLISIS LITOESTRATIGRÁFICO DE LA FORMACIÓN CERRO AZUL (MIOCENO SUPERIOR) EN LA PROVINCIA DE LA PAMPA Graciela VISCONTI1, Ricardo N. MELCHOR1,2, Claudia I. MONTALVO1, Aldo M. UMAZANO1,2 y Elena E. DE ELORRIAGA1 1 Universidad Nacional de La Pampa, Facultad de Ciencias Exactas y Naturales. E-mail: [email protected] 2 INCITAP (CONICET-UNLPam) RESUMEN La Formación Cerro Azul fue definida en 1980 para incluir a las sedimentitas continentales pliocenas (limolitas arenosas y are- niscas limosas) que afloran de manera discontinua en casi todo el ámbito de la provincia de La Pampa. No obstante, varias in- vestigaciones paleontológicas realizadas a partir de la segunda mitad de la década del 80’ han permitido ubicar geocronológi- camente a la unidad en el intervalo 10 Ma a 5,8-5,7 Ma. El objetivo del trabajo es realizar un análisis de las características li- toestratigráficas de la Formación Cerro Azul de acuerdo al Código Argentino de Estratigrafía. Se propone un lectoestratoti- po para la unidad, consistente en el perfil de Algarrobo del Águila y un perfil auxiliar en cerro El Morro. También se estable- cieron las relaciones estratigráficas con otras formaciones. Se interpreta un paleoambiente depositacional de llanura, donde alter- nan depósitos de loess con numerosos paleosuelos, detectándose escasos depósitos lacustres en la base y pocos cursos fluviales. Palabras clave: Formación Cerro Azul, Mioceno, Huayqueriense, La Pampa. ABSTRACT: Lithostratigrafic analysis of Cerro Azul Formation (Upper Miocene), La Pampa. Cerro Azul Formation was defined in 1980 to include the Pliocene continental sedimentary rocks (sandy silt and silty sand) that appear in discontinuous outcrops in al- most all La Pampa province. -
The Record of Miocene Impacts in the Argentine Pampas
Meteoritics & Planetary Science 41, Nr 5, 749–771 (2006) Abstract available online at http://meteoritics.org The record of Miocene impacts in the Argentine Pampas Peter H. SCHULTZ1*, Marcelo Z¡RATE2, Willis E. HAMES3, R. Scott HARRIS1, T. E. BUNCH4, Christian KOEBERL5, Paul RENNE6, and James WITTKE7 1Department of Geological Sciences, Brown University, Providence, Rhode Island 02912–1846, USA 2Facultad de Ciencias Exactas y Naturales, Universidad Nacional de La Pampa, Avda Uruguay 151, 6300 Santa Rosa, La Pampa, Argentina 3Department of Geology, Auburn University, Auburn, Alabama 36849, USA 4Department of Geology, Northern Arizona University, Flagstaff, Arizona 86011, USA 5Department of Geological Sciences, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria 6Berkeley Geochronology Center, 2455 Ridge Road, Berkeley, California 94709, USA 7Department of Geology, Northern Arizona University, Flagstaff, Arizona 86011, USA *Corresponding author. E-mail: [email protected] (Received 02 March 2005; revision accepted 14 December 2005) Abstract–Argentine Pampean sediments represent a nearly continuous record of deposition since the late Miocene (∼10 Ma). Previous studies described five localized concentrations of vesicular impact glasses from the Holocene to late Pliocene. Two more occurrences from the late Miocene are reported here: one near Chasicó (CH) with an 40Ar/39Ar age of 9.24 ± 0.09 Ma, and the other near Bahía Blanca (BB) with an age of 5.28 ± 0.04 Ma. In contrast with andesitic and dacitic impact glasses from other localities in the Pampas, the CH and BB glasses are more mafic. They also exhibit higher degrees of melting with relatively few xenoycrysts but extensive quench crystals. In addition to evidence for extreme heating (>1700 °C), shock features are observed (e.g., planar deformation features [PDFs] and diaplectic quartz and feldspar) in impact glasses from both deposits. -
Download Vol. 11, No. 3
BULLETIN OF THE FLORIDA STATE MUSEUM BIOLOGICAL SCIENCES Volume 11 Number 3 CATALOGUE OF FOSSIL BIRDS: Part 3 (Ralliformes, Ichthyornithiformes, Charadriiformes) Pierce Brodkorb M,4 * . /853 0 UNIVERSITY OF FLORIDA Gainesville 1967 Numbers of the BULLETIN OF THE FLORIDA STATE MUSEUM are pub- lished at irregular intervals. Volumes contain about 800 pages and are not nec- essarily completed in any one calendar year. WALTER AuFFENBERC, Managing Editor OLIVER L. AUSTIN, JA, Editor Consultants for this issue. ~ HILDEGARDE HOWARD ALExANDER WErMORE Communications concerning purchase or exchange of the publication and all manuscripts should be addressed to the Managing Editor of the Bulletin, Florida State Museum, Seagle Building, Gainesville, Florida. 82601 Published June 12, 1967 Price for this issue $2.20 CATALOGUE OF FOSSIL BIRDS: Part 3 ( Ralliformes, Ichthyornithiformes, Charadriiformes) PIERCE BRODKORBl SYNOPSIS: The third installment of the Catalogue of Fossil Birds treats 84 families comprising the orders Ralliformes, Ichthyornithiformes, and Charadriiformes. The species included in this section number 866, of which 215 are paleospecies and 151 are neospecies. With the addenda of 14 paleospecies, the three parts now published treat 1,236 spDcies, of which 771 are paleospecies and 465 are living or recently extinct. The nominal order- Diatrymiformes is reduced in rank to a suborder of the Ralliformes, and several generally recognized families are reduced to subfamily status. These include Geranoididae and Eogruidae (to Gruidae); Bfontornithidae -
Dieter Thomas Tietze Editor How They Arise, Modify and Vanish
Fascinating Life Sciences Dieter Thomas Tietze Editor Bird Species How They Arise, Modify and Vanish Fascinating Life Sciences This interdisciplinary series brings together the most essential and captivating topics in the life sciences. They range from the plant sciences to zoology, from the microbiome to macrobiome, and from basic biology to biotechnology. The series not only highlights fascinating research; it also discusses major challenges associated with the life sciences and related disciplines and outlines future research directions. Individual volumes provide in-depth information, are richly illustrated with photographs, illustrations, and maps, and feature suggestions for further reading or glossaries where appropriate. Interested researchers in all areas of the life sciences, as well as biology enthusiasts, will find the series’ interdisciplinary focus and highly readable volumes especially appealing. More information about this series at http://www.springer.com/series/15408 Dieter Thomas Tietze Editor Bird Species How They Arise, Modify and Vanish Editor Dieter Thomas Tietze Natural History Museum Basel Basel, Switzerland ISSN 2509-6745 ISSN 2509-6753 (electronic) Fascinating Life Sciences ISBN 978-3-319-91688-0 ISBN 978-3-319-91689-7 (eBook) https://doi.org/10.1007/978-3-319-91689-7 Library of Congress Control Number: 2018948152 © The Editor(s) (if applicable) and The Author(s) 2018. This book is an open access publication. Open Access This book is licensed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made. -
Onetouch 4.0 Scanned Documents
/ Chapter 2 THE FOSSIL RECORD OF BIRDS Storrs L. Olson Department of Vertebrate Zoology National Museum of Natural History Smithsonian Institution Washington, DC. I. Introduction 80 II. Archaeopteryx 85 III. Early Cretaceous Birds 87 IV. Hesperornithiformes 89 V. Ichthyornithiformes 91 VI. Other Mesozojc Birds 92 VII. Paleognathous Birds 96 A. The Problem of the Origins of Paleognathous Birds 96 B. The Fossil Record of Paleognathous Birds 104 VIII. The "Basal" Land Bird Assemblage 107 A. Opisthocomidae 109 B. Musophagidae 109 C. Cuculidae HO D. Falconidae HI E. Sagittariidae 112 F. Accipitridae 112 G. Pandionidae 114 H. Galliformes 114 1. Family Incertae Sedis Turnicidae 119 J. Columbiformes 119 K. Psittaciforines 120 L. Family Incertae Sedis Zygodactylidae 121 IX. The "Higher" Land Bird Assemblage 122 A. Coliiformes 124 B. Coraciiformes (Including Trogonidae and Galbulae) 124 C. Strigiformes 129 D. Caprimulgiformes 132 E. Apodiformes 134 F. Family Incertae Sedis Trochilidae 135 G. Order Incertae Sedis Bucerotiformes (Including Upupae) 136 H. Piciformes 138 I. Passeriformes 139 X. The Water Bird Assemblage 141 A. Gruiformes 142 B. Family Incertae Sedis Ardeidae 165 79 Avian Biology, Vol. Vlll ISBN 0-12-249408-3 80 STORES L. OLSON C. Family Incertae Sedis Podicipedidae 168 D. Charadriiformes 169 E. Anseriformes 186 F. Ciconiiformes 188 G. Pelecaniformes 192 H. Procellariiformes 208 I. Gaviiformes 212 J. Sphenisciformes 217 XI. Conclusion 217 References 218 I. Introduction Avian paleontology has long been a poor stepsister to its mammalian counterpart, a fact that may be attributed in some measure to an insufRcien- cy of qualified workers and to the absence in birds of heterodont teeth, on which the greater proportion of the fossil record of mammals is founded. -
Sistemática Y Filogenia De Las Aves Fororracoideas (Gruiformes, Cariamae)
SISTEMÁTICA Y FILOGENIA DE LAS AVES FORORRACOIDEAS (GRUIFORMES, CARIAMAE) Federico Agnolín1, 2 1Laboratorio de Anatomía Comparada y Evolución de los Vertebrados, Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”. Av. Ángel Gallardo, 470 (1405), Buenos Aires, República Argentina. fedeagnolí[email protected] 2Área Paleontología. Fundación de Historia Natural “Félix de Azara”. Departamento de Ciencias Naturales y Antropolo- gía. CEBBAD - Universidad Maimónides. Valentín Virasoro 732 (C1405BDB), Buenos Aires, República Argentina. Sistemática y Filogenia de las Aves Fororracoideas (Gruiformes, Cariamae). Federico Agnolín. Primera edición: septiembre de 2009. Fundación de Historia Natural Félix de Azara Departamento de Ciencias Naturales y Antropología CEBBAD - Instituto Superior de Investigaciones Universidad Maimónides Valentín Virasoro 732 (C1405BDB) Ciudad Autónoma de Buenos Aires, República Argentina. Teléfono: 011-4905-1100 (int. 1228). E-mail: [email protected] Página web: www.fundacionazara.org.ar Diseño: Claudia Di Leva. Agnolín, Federico Sistemática y filogenia de las aves fororracoideas : gruiformes, cariamae / Federico Agnolín ; dirigido por Adrián Giacchino. - 1a ed. - Buenos Aires : Fundación de Historia Natural Félix de Azara, 2009. 79 p. : il. ; 30x21 cm. - (Monografías Fundación Azara / Adrián Giacchino) ISBN 978-987-25346-1-5 © Fundación de Historia Natural Félix de Azara Queda hecho el depósito que marca la ley 11.723 Sistemática y Filogenia de las aves fororracoideas (Gruiformes, Cariamae) Resumen. En el presente trabajo se efectúa una revisión sistemática de las aves fororracoideas y se propone por primera vez una filogenia cladística para los Phororhacoidea y grupos relacionados. Se acuña el nuevo nombre Notogrues para el clado que incluye entre otros taxones a Psophia, Cariamidae y Phororhacoidea. Dentro de los Notogrues se observa una paulatina tendencia hacia la pérdida del vuelo y la carnivoría.