DOCSLIB.ORG

Sin Título-1

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Sin Título-1 ORGANIZA INSTITUCIONES COOPERANTES AUSPICIADORES INTERNACIONALES AUSPICIADORES NACIONALES PARTICIPAN COMISIÓN ORGANIZADORA Presidente: César Augusto Chacaltana Budiel Secretaria: Isabel María del Carmen Morales Reyna Asistente Técnica Científica: Luz Marina Tejada Medina Asistente Técnico Administrativo: Miguel Ángel Hernández Cajo Asistente de Relaciones Públicas: Marden Rojas Girón COMITE CONSULTIVO Dr. Víctor Benavides Cáceres Dr. Alfredo Pardo Arguedas Dr. Víctor Carlotto Caillaux COLABORADORES CON LA REVISIÓN DE LA PRESENTE PUBLICACIÓN Aldo ALVÁN Alfredo PARDO Bilberto ZAVALA César CHACALTANA Dimila MOTHÉ Enrique DÍAZ MARTÍNEZ Fernando GARCÍA Ivette GIRÓN Luz TEJADA MEDINA Manuel ALDANA María del Carmen MORALES Natalia ARAKAKI Pedro TAPIA Rodolfo SALAS Susana DAMBORENEA EDITORES César Chacaltana Luz Tejada-Medina María del Carmen Morales COMPOSICIÓN Y DISEÑO Sonia Bermúdez Lozano Olga Hernández Cerna PRESENTACIÓN Los albores del conocimiento paleontológico en el Perú, se vinculan al resultado de las investigaciones de personas e instituciones, marcadas por la curiosidad y necesidad aplicativa de los fósiles. En el ámbito geológico, estas actividades solo pudieron ser sistematizadas y desarrolladas con carácter formal, a partir de la creación en nuestro país de la Comisión Carta Geológica Nacional, con su Departamento de Paleontología, el cual desde 1965, no solo evaluaba sino que validaba, los hallazgos de fósiles en nuestro territorio. De esta manera, el estado peruano formalizaba una ligazón geología-paleontología en paralelo, mediante sus vínculos internacionales con otras instituciones en el mundo, dado el auge de la exploración minera y petrolera y sus requerimientos cartográficos. Hoy en día, otras instituciones se han sumado a estas actividades y están contribuyendo de muchas maneras para una adecuada aplicación de sus resultados concretos y específicos, fundamentales para evaluar, planificar y administrar nuestros recursos naturales. En este contexto, resulta imprescindible la información que brindan los fósiles colectados a lo largo y ancho del país tanto por su aplicabilidad como por su importancia para su desarrollo, pues los estudios paleontológicos permiten la reconstrucción de ambientes antiguos, la definición de antiguas posiciones geográficas, el reconocimiento de episodios de extinción, la datación de los materiales sedimentarios y la explotación no solo de los recursos geológicos no renovables, sino también de los renovables tales como los relacionados a sectores Educación, Turismo y Cultura. Lanzamiento del I Simposio Internacional de Paleontología del Perú en el auditorio de la Sociedad Geológica (En la mesa de izquierda a derecha el Arq. Jesús Suárez, Dr. Víctor Carlotto y el Ing. César Chacaltana. En el pódium, por la Sociedad Geológica del Perú, el Ing. Carlos Astorga). 6 En este sentido, el Instituto Geológico Minero y Metalúrgico – INGEMMET, cuya una de sus misiones es la de desarrollar, mantener y actualizar la Carta Geológica Nacional, contempla realizar investigaciones paleontológicas que contribuyan al estudio y comprensión de la evolución de las especies, los cambios climáticos, la biodiversidad, así como a la protección del patrimonio paleontológico, en coordinación con las entidades competentes. En mérito a ello, en esta oportunidad y cumpliendo su rol de promover y difundir las diversas disciplinas geocientíficas, materializa este encuentro que nos place convocar y así generar una tribuna de exposición a fin de actualizar el conocimiento paleontológico del país. La intención no solo consiste en informar sobre nuestra herencia paleontológica y comprender la naturaleza que explica la biodiversidad actual y su distribución en la esfera geográfica, sino también mostrar cómo emplear ese conocimiento para aprovechar mejor el recurso paleontológico. Para tal fin, los investigadores del Área de Paleontología de la Dirección de Geología Regional del INGEMMET junto con algunos colegas y en coordinación con el personal de la Dirección de Relaciones Institucionales del INGEMMET unieron esfuerzos en la organización del evento que tuvo como objetivo propiciar el encuentro de investigadores nacionales y extranjeros del tema paleontológico en los diversos taxones fósiles estudiados del territorio peruano, para dar a conocer nuevas evidencias, lanzar nuevas interpretaciones y la revisión o comprobación de algunas hipótesis y/o predicciones lanzadas en los últimos años. Bajo este escenario de divulgación, hubo un espacio preferencial para las discusiones y debates, donde se pudo incluir los aspectos referidos a la problemática de la formación de jóvenes relacionados a las actividades paleontológicas. La presente publicación contiene los trabajos presentados al I SIMPOSIO INTERNACIONAL DE PALEONTOLOGÍA DEL PERÚ, realizados en la ciudad de Lima los días 12 y 13 de Setiembre del 2013. Las presentaciones tuvieron lugar en el auditorio «Alberto Benavides de la Quintana» de la Sociedad Geológica del Perú pero es necesario mencionar las actividades que se desarrollaron en estos días del simposio y que han generado el consenso para poder afirmar que es considerado exitoso no solo por las evidencias captadas en la información periodística, sino por la asistencia de investigadores nacionales y extranjeros, profesores estudiantes y público en general habiéndose registrado 135 inscritos, con un promedio de asistencia de 100 personas por día. También por haberse cubierto en amplitud y calidad, la estructura planteada en sus simposios temáticos mediante las conferencias y charlas magistrales en los dos días destinados en su realización. Para ello, las sesiones científicas y exhibiciones de posters estuvieron enmarcadas en función a sus aspectos taxonómicos y a su posición en la escala del Tiempo Geológico ocupando los principales temas de investigación (micropaleontología, paleobotánica, paleontología de invertebrados, paleontología de vertebrados, tafonomía y estratigrafía). Igualmente, por haber generado los espacios de discusión apropiados a las necesidades del país como es el caso de la Mesa Redonda denominada: «El estado de las colecciones paleontológicas y su marco legal hacia la creación de un catálogo virtual en el Perú», donde participaron del debate el Ministerio de Cultura, el INGEMMET, el Museo de Historia Natural de la Universidad Nacional Mayor de San Marcos y la Universidad del Altiplano de Puno, y donde se aprobó la necesidad de formular la denominada DECLARACIÓN PALEONTOLÓGICA DEL PERÚ. Asimismo, durante el Foro «Rol económico de la paleontología en el Perú: educación y difusión con rentabilidad» se trataron temas acerca de la problemática educativa y sus consecuencias en la generación de una identidad paleontológica nacional, la concepción de patrimonio paleontológico y sus efectos en el turismo geológico, el estado actual de las Colecciones paleontológicas y la generación de información científica básica para la producción de mapas geológicos. Según se pudo colegir, las actividades paleontológicas quedaron supeditadas a la normativa legal vigente que regula no solo los procedimientos de exploración sino que genera muchas veces impedimentos a la investigación. Por ello y como consecuencia del debate se optó por la firma de la DECLARACIÓN PALEONTOLÓGICA DEL PERÚ SOBRE LA CONSIDERACIÓN DE LOS FÓSILES COMO PATRIMONIO NATURAL DEL PERÚ a fin de definir el objeto de la ley y sobre bases conceptuales dirigir una nueva propuesta legislativa al Congreso de la República. 7 Por otro lado, se generó un paleodebate denominado «Evolución y Fe cristiana en tiempos de la Globalización», donde con la participación de un representante de la iglesia católica, se discutió acerca de las distintas posiciones filosóficas para la comprensión de la evolución de la vida, privilegiándose la intervención de los asistentes con las preguntas de rigor. Paralelamente al desarrollo del programa científico, se realizaron EXPOSICIONES DE COLECCIONES PALEONTOLÓGICAS de institutos de investigación y universidades con el objeto de difundir y hacer conocer al público asistente algunas de las maravillas fósiles de nuestro territorio. Posterior a este encuentro de dos días, se realizó un TALLER PALEONTOLÓGICO, con una visita a los afloramientos de la cuenca Pisco en el departamento de Ica, visitando la Zona de Reserva de la Península de Paracas y el desierto de Ocucaje los días 14 y 15 de Setiembre. Para culminar las actividades, se realizó un Curso Post-Simposio denominado «La Micropaleontología y su aplicación en el cartografiado geológico», dictado por el Dr. Norberto Malumián, reconocido micropaleontólogo Investigador del Consejo Nacional de Investigaciones Científicas y Técnicas de la República Argentina, el cual se desarrolló en el auditorio del INGEMMET los días del 16 al 20 de Setiembre. Taller Paleontológico: Ballena fósil en secuencias de areniscas tobáceas y diatomáceas de la Formación Pisco, en la localidad de Ocucaje, Ica-Perú. El evento constituye el primer encuentro científico internacional llevado a cabo en nuestro país dedicado exclusivamente a la Paleontología, sentando un importante precedente y caudal de experiencias asumidas por el INGEMMET lo que de acuerdo a las palabras de nuestra Presidenta del INGEMMET, Ing. Susana Vilca Achata, permitirá su próxima realización en los próximos dos años y hacerlo cíclico, dada la necesidad de democratizar el conocimiento científico del país. Este Libro de Resúmenes incluye 40 trabajos, distribuidos en simposios temáticos los cuales fueron sometidos a una revisión por parte de investigadores del país
Load more

Recommended publications
  • “Halitherium” Cristolii Fitzinger, 1842 (Mammalia, Sirenia) from the Late Oligocene of Austria, with the Description of a New Genus
    European Journal of Taxonomy 256: 1–32 ISSN 2118-9773 http://dx.doi.org/10.5852/ejt.2016.256 www.europeanjournaloftaxonomy.eu 2016 · Voss M. et al. This work is licensed under a Creative Commons Attribution 3.0 License. Research article urn:lsid:zoobank.org:pub:43130F90-D802-4B65-BC6D-E3815A951C09 A taxonomic and morphological re-evaluation of “Halitherium” cristolii Fitzinger, 1842 (Mammalia, Sirenia) from the late Oligocene of Austria, with the description of a new genus Manja VOSS 1 ,*, Björn BERNING 2 & Erich REITER 3 1 Museum für Naturkunde – Leibniz Institute for Evolution and Biodiversity Science, Invalidenstraße 43, 10115 Berlin, Germany. 2 Upper Austrian State Museum, Geoscience Collections, Welser Straße 20, 4060 Leonding, Austria. 3 Institut für Chemische Technologie Anorganischer Stoffe, Johannes Kepler Universität Linz, Altenberger Straße 69, 4040 Linz, Austria. * Corresponding author: [email protected] 2 Email: [email protected] 3 Email: [email protected] 1 urn:lsid:zoobank.org:author:5B55FBFF-7871-431A-AE33-91A96FD4DD39 2 urn:lsid:zoobank.org:author:30D7D0DB-F379-4006-B727-E75A0720BD93 3 urn:lsid:zoobank.org:author:EA57128E-C88B-4A46-8134-0DF048567442 Abstract. The fossil sirenian material from the upper Oligocene Linz Sands of Upper Austria is reviewed and re-described in detail following a recent approach on the invalidity of the genus Halitherium Kaup, 1838. This morphological study provides the fi rst evidence for the synonymy of “Halitherium” cristolii Fitzinger 1842, “H.” abeli Spillmann, 1959 and “H.” pergense (Toula, 1899), supporting the hypothesis that only a single species inhabited the late Oligocene shores of present-day Upper Austria.
    [Show full text]
  • 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.
    [Show full text]
  • Abstractbook 6Ewvp.Pdf
    6th European Workshop on Vertebrate Palaeontology - Florence and Montevarchi (Italy) - September 19-22, 2001 The organizing team welcomes the participants in the 6th European Workshop of Vertebrate Paleontology in Florence and expresses its deepest thanks to the many colleagues that enthusiastically answered to our call making this issue possible. The organizers hope the participants will find Florence not only that jewel-case of art celebrated all over the world, but also an appropriate place for discussing crumbled fossil bones. May the meeting come up to everybody’s best expectations! The 6th European Workshop on Vertebrate Paleontology has been made possible, thanks to the support and collaboration obtained from the Tethys Cultural Association, the Section of Geology and Paleontology of the Museum of Natural History of Florence, the Department of Earth Sciences of Florence and the Museum of Plaeontology of the Accademia Valdarnese del Poggio of Montevarchi. The organizers would like to thank the administration of the Section of Geology and Paleontology of the Museum of Natural History of Florence and the Accademia Valdarnese del Poggio for granting their facilities, and all the volunteers for their generous donation of time and talent. Without their dedication and tireless efforts, this issue would have been impossible. Special thanks are due to Maria Cristina Andreani, manager of the display department of the Section of Geology and Paleontology of the Museum of Natural History of Florence, for her assistance and for creating the logo and producing the panels of explanation of the evolution of the Upper Valdarno. The organizers are also grateful to the Comune of Montevarchi for offering the conference lunch and to Tiziana Vitali for arranging the tea party.
    [Show full text]
  • New and Poorly Known Perisphinctoidea (Ammonitina) from the Upper Tithonian of Le Chouet (Drôme, SE France)
    Volumina Jurassica, 2014, Xii (1): 113–128 New and poorly known Perisphinctoidea (Ammonitina) from the Upper Tithonian of Le Chouet (Drôme, SE France) Luc G. BULOT1, Camille FRAU2, William A.P. WIMBLEDON3 Key words: Ammonoidea, Ataxioceratidae, Himalayitidae, Neocomitidae, Upper Tithonian, Le Chouet, South-East France. Abstract. The aim of this paper is to document the ammonite fauna of the upper part of the Late Tithonian collected at the key section of Le Chouet (Drôme, SE France). Emphasis is laid on new and poorly known Ataxioceratidae, Himalayitidae and Neocomitidae from the upper part of the Tithonian. Among the Ataxioceratidae, a new account on the taxonomy and relationship between Paraulacosphinctes Schindewolf and Moravisphinctes Tavera is presented. Regarding the Himalayitidae, the range and content of Micracanthoceras Spath is discussed and two new genera are introduced: Ardesciella gen. nov., for a group of Mediterranean ammonites that is homoeomorphic with the Andean genus Corongoceras Spath, and Pratumidiscus gen. nov. for a specimen that shows morphological similarities with the Boreal genera Riasanites Spath and Riasanella Mitta. Finally, the occurrence of Neocomitidae in the uppermost Tithonian is documented by the presence of the reputedly Berriasian genera Busnardoiceras Tavera and Pseudargentiniceras Spath. INTRODUCTION known Perisphinctoidea from the Upper Tithonian of this reference section. Additional data on the Himalayitidae in- The unique character of the ammonite fauna of Le Chouet cluding the description and discussion of Boughdiriella (near Les Près, Drôme, France) (Fig. 1) has already been chouetensis gen. nov. sp. nov. are to be published elsewhere outlined by Le Hégarat (1973), but, so far, only a handful of (Frau et al., 2014).
    [Show full text]
  • 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.
    [Show full text]
  • Hereby Give My
    NAME &C6teffitfi°. r^fT/DEPARTMENT . .£^*fX. .... DEGREE THE UNIVERSITY OF HULL Deposit of thesis in aocor dance with Senate Mlnutea 131. 1955/56 and 141. 1970/71 hereby give my conaent that the copy of my thesis if accepted for the degree of ____rrlSc *_______ in University of Hull and thereafter deposited in the University Library shall be available for consultation, inter-library loan and photocopying at the discretion of the University Librarian from the following date ____ Signature If by reason of special circumstances the author wishes to withhold for a period of not more than 5 years from the date of the degree being awarded the consent required by the Senate, application should immediately be made in writing to the University Librarian, giving a full statement of the circumstances involved. IN THE EVBilT OF THIS FORM HOT BEING RLTURiJED TO THE HIGH-IR DEGRr^S OFFICE WITH THii THKSIS IT WILL BE ASSUMSD THAT THE AUTHOR COtBKUTS TC THE THESIS BKINC MADE AVAILABLE AS INDICATED ABOVE. THE UNIVERSITY OF HULL The Benthonic Foraminifera across the Cretaceous-Tertiary boundary in the Zin Valley, Negev, Israel. Thesis submitted for the Degree of the Master of Science in Micropalaeontology in The University of Hull by Alexander John Chepstow-Lusty. B.Sc. (Joint Hons.) Department of Geology, September 1986. ABSTRACT Closely spaced samples from two sections of the marly Taqiye Formation in the Zin Valley (southern Israel), Ein Mor (EM) and Hor HaHar (HH) containing the Cretaceous-Tertiary (K/T) boundary, have been analysed for benthonic foraminifera within the framework of nannofossil and planktonic foraminiferal zones.
    [Show full text]
  • 1 Published in Journal of South American Earth Sciences, 31:414
    Published in Journal of South American Earth Sciences, 31:414-425, 2011 (This is a prepublication version, with larger illustrations) A high resolution stratigraphic framework for the remarkable fossil cetacean assemblage of the Miocene/Pliocene Pisco Formation, Peru Leonard Brand a,*, Mario Urbina b, Arthur Chadwick c, Thomas J. DeVries d, Raul Esperante e, a Department of Earth and Biological Sciences, Loma Linda University, Loma Linda, CA 92350 b Museo de Historia Natural, Lima 14, Peru c Southwestern Adventist University, Keene, TX 76059 d Burke Museum of Natural History and Culture, University of Washington, Seattle, WA 98195 e Geoscience Research Institute, Loma Linda, CA 92350 Abstract The Miocene/Pliocene Pisco Formation of Peru contains a rich marine vertebrate fossil record, providing a unique opportunity for the study of paleoecology and evolution, along with the sedimentological context of the fossils. The lack of a high-resolution stratigraphic framework has hampered such study. In this paper we develop the needed stratigraphy for the areas in the Pisco Formation where most of the vertebrate paleontological research is occurring. In the Ica Valley and in the vicinity of Lomas, series of lithologically or paleontologically unique marker beds were identified. These were walked out and documented with GPS technology. Measured sections connecting these marker beds provide a stratigraphic framework for the areas studied. GPS locations, maps of the marker beds on aerial photographs, and outcrop photographs allow field determination of the stratigraphic positions of study areas. Keywords: Stratigraphy, Miocene, Pliocene, Pisco, Peru * Corresponding author. FAX 909-558-0259 E-mail address: [email protected] (Leonard Brand) 1.
    [Show full text]
  • 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.
    [Show full text]
  • How Whales Used to Filter: Exceptionally Preserved Baleen in A
    Journal of Anatomy J. Anat. (2017) 231, pp212--220 doi: 10.1111/joa.12622 How whales used to filter: exceptionally preserved baleen in a Miocene cetotheriid Felix G. Marx,1,2,3 Alberto Collareta,4,5 Anna Gioncada,4 Klaas Post,6 Olivier Lambert,3 Elena Bonaccorsi,4 Mario Urbina7 and Giovanni Bianucci4 1School of Biological Sciences, Monash University, Clayton, Vic., Australia 2Geosciences, Museum Victoria, Melbourne, Vic., Australia 3D.O. Terre et Histoire de la Vie, Institut Royal des Sciences Naturelles de Belgique, Brussels, Belgium 4Dipartimento di Scienze della Terra, Universita di Pisa, Pisa, Italy 5Dottorato Regionale in Scienze della Terra Pegaso, Pisa, Italy 6Natuurhistorisch Museum Rotterdam, Rotterdam, The Netherlands 7Departamento de Paleontologıa de Vertebrados, Museo de Historia Natural de la Universidad Nacional Mayor de San Marcos, Lima, Peru Abstract Baleen is a comb-like structure that enables mysticete whales to bulk feed on vast quantities of small prey, and ultimately allowed them to become the largest animals on Earth. Because baleen rarely fossilises, extremely little is known about its evolution, structure and function outside the living families. Here we describe, for the first time, the exceptionally preserved baleen apparatus of an entirely extinct mysticete morphotype: the Late Miocene cetotheriid, Piscobalaena nana, from the Pisco Formation of Peru. The baleen plates of P. nana are closely spaced and built around relatively dense, fine tubules, as in the enigmatic pygmy right whale, Caperea marginata. Phosphatisation of the intertubular horn, but not the tubules themselves, suggests in vivo intertubular calcification. The size of the rack matches the distribution of nutrient foramina on the palate, and implies the presence of an unusually large subrostral gap.
    [Show full text]
  • Back Matter (PDF)
    GENERAL INDEX TO THE QUARTERLY JOURNAL AND PROCEEDINGS OF THE GEOLOGIC&L SOCIETY. AC~.AND,. H. D., on Vole. Series nr. Agglomerate, vole., of Lambay I., Herefordshire Beacon, 556-562 w. 141. maps & sect. Airolo (St: Gothard), Tremola Schists Aclisina, observats, on genus, 45"72 nr., 358, 359. & pls. iii-v. Aldeburgh (Suffolk), struct, of Cor. aciculata, sp. nov., 59 & pl. iv. Crag fr. Ramsholt to, 327, 329 fig. ; .... attenuata, sp. nov., 58 & pl. iv. Crag at, 338, 339. -- costatula, 56 & pl. iii ; car. dubia Alderbury Hill (Wilts), flint from, nov., 57 & pl. iii. exhib., cvi ; plateau-gravel at, 297. elegan~ula, sp. nov., 62 & pl. iv. Aldworth (Oxon), Quartzite-gravel nr., elongata, 54 & pl. iii ; vat. cingu- 591. lata nov., 55 & pl. iii; vat. varians Alexandra Land (Franz Josef Land), nov., 55 & pl. iii. geol. feats, of, 631. -- grantoneusis, sp. nov., 60 & pl. iv. hlgous (?) borings, infilled w. silicate ---parwda, sp. nov., 64 & pl. v. of iron, 322-323 fig. -- pulchra, vat. tenuis, 52 & pl. iii ; ALLrORV, S., obituary of, Ix. car. iutermedia nov., 53 & pl. iii. Almannagja (Iceland) basalt, chem. pusilla, sp. nov., 63 & pl. iv. anal. of, 647. quadrata, sp. nov., 61 & pl. iv; Amaltheidm, short period of domin- car. striatissima nov., 62. ance, 448 ; list of genera, 459. similis, sp. nov., 57 & pls. iii-iv. Amlweh (Anglesey), metamorph, grits -- (~.) sulcatula, 64 & pLv. & shales S.W. of, 374-381 figs. ~enuisgriata, sp. nov., 60 & pl. iv. Ammonite-families, & their conn. w. -- terebra, sp. nov., 63 & pl. iv, ' Jurassic' time-divs., 443-444 ; Aclisoides, section of Murchisonia, 66.
    [Show full text]
  • Symposium I: Evolution O the Depositional Systems
    9 SYMPOSIUM I: EVOLUTION O THE DEPOSITIONAL SYSTEMS MINERALOGICAL CHARACTERIZATION increase of siliciclastic sedimentation with the progressive shallow- O LYSCH SEQUENCES O THE SE ALPS ing of the basin from deep-sea to delta facies. In the Vipava lysch (VI) carbonates are predominant. In the lysch of Brkini (BK) the AND OUTER DINARIDES (NE ITALY, mineral content is similar to that of the coeval sandstones in the JB. SLOVENIA, CROATIA) Dolomite appears only in the molasse samples. In the Istrian Basin (IB) no clear trend is noticed. In the western part the siliciclastic material content is higher than in the eastern part (ig. 2). A. ALBERTI1, D. LENAZ 1, . PRINCIVALLE 1 As for heavy minerals, Cr-spinel, garnet (pyralspite and gran- and G. TUNIS 2 dite series), zircon, tourmaline, rutile, pyrite, chloritoid, pyroxene (opx and cpx), staurolite and amphibole were identified, but their 1Dipartimento di Scienze della Terra, Via Weiss 8, 34127 Trieste, Italy 2Dipartimento di Scienze Geologiche, Ambientali e Marine, Via Weiss 2, 34127 Trieste, Italy; *[email protected] Key words: lysch, X-ray powder diffraction, heavy mineral assemblage, source areas. Introduction An extensive lysch complex of Late Cretaceous to Early Ter- tiary age outcrops in north-eastern Italy, western Slovenia and Is- tria (Croatia) (ig. 1). The rock sequences belong to different dep- ositional basins and have different ages. Sedimentation in the basins of the northern part of the complex (Slovenia and riuli) occurred from the Maastrichtian to Middle Eocene (Engel 1974; Tunis & Venturini 1989), while in the southern part (Trieste, SW Slovenia and Istria) it took place from the Middle to Late Eocene (Marincic et al.
    [Show full text]
  • PDF of Manuscript and Figures
    The triple origin of whales DAVID PETERS Independent Researcher 311 Collinsville Avenue, Collinsville, IL 62234, USA [email protected] 314-323-7776 July 13, 2018 RH: PETERS—TRIPLE ORIGIN OF WHALES Keywords: Cetacea, Mysticeti, Odontoceti, Phylogenetic analyis ABSTRACT—Workers presume the traditional whale clade, Cetacea, is monophyletic when they support a hypothesis of relationships for baleen whales (Mysticeti) rooted on stem members of the toothed whale clade (Odontoceti). Here a wider gamut phylogenetic analysis recovers Archaeoceti + Odontoceti far apart from Mysticeti and right whales apart from other mysticetes. The three whale clades had semi-aquatic ancestors with four limbs. The clade Odontoceti arises from a lineage that includes archaeocetids, pakicetids, tenrecs, elephant shrews and anagalids: all predators. The clade Mysticeti arises from a lineage that includes desmostylians, anthracobunids, cambaytheres, hippos and mesonychids: none predators. Right whales are derived from a sister to Desmostylus. Other mysticetes arise from a sister to the RBCM specimen attributed to Behemotops. Basal mysticetes include Caperea (for right whales) and Miocaperea (for all other mysticetes). Cetotheres are not related to aetiocetids. Whales and hippos are not related to artiodactyls. Rather the artiodactyl-type ankle found in basal archaeocetes is also found in the tenrec/odontocete clade. Former mesonychids, Sinonyx and Andrewsarchus, nest close to tenrecs. These are novel observations and hypotheses of mammal interrelationships based on morphology and a wide gamut taxon list that includes relevant taxa that prior studies ignored. Here some taxa are tested together for the first time, so they nest together for the first time. INTRODUCTION Marx and Fordyce (2015) reported the genesis of the baleen whale clade (Mysticeti) extended back to Zygorhiza, Physeter and other toothed whales (Archaeoceti + Odontoceti).
    [Show full text]