Ecdysozoans: the Molting Animals
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Exoskeletal Structures and Ultrastructures in Lower Devonian Dalmanitid Trilobites of the Prague Basin (Czech Republic)
Exoskeletal structures and ultrastructures in Lower Devonian dalmanitid trilobites of the Prague Basin (Czech Republic) PETR BUDIL & FRANTIEK HÖRBINGER Our current studies of the exoskeletal structures and ultrastructures in Lower Devonian dalmanitid trilobites of the Prague Basin are briefly described and discussed. The interior of the exoskeleton in most specimens from the Prague Ba- sin is recrystallised and largely filled with very fine homogeneous sparitic cement. The ultrastructures sensu stricto, e.g., the lamination, layers forming the exoskeleton, and the fine pores or “Osmólska” cavities, are mostly imperceptible even at higher magnifications. However, ultrastructural relics were observed in some polished thin sections and exoskeletal fragments using electron microscopy. Larger structures, especially the eyes, the megapores penetrating the exoskeleton, and the surface sculptures (prosopon sensu Gill 1949), are relatively well preserved and show very fine details. The bio- logical significance of megapores is briefly discussed. Modification of the inner parts of the exoskeletons by diagenetic processes, obscuring most of the fine internal structures, is evident. • Key words: Trilobita, Dalmanitidae, exoskeleton microstructure. BUDIL,P.&HÖRBINGER, F. 2007. Exoskeletal structures and ultrastructures in Lower Devonian dalmanitid trilobites of the Prague Basin (Czech Republic). Bulletin of Geosciences 82(1), 27–36 (4 figures, 1 table). Czech Geological Survey, Prague. ISSN 1214-1119. Manuscript received January 17, 2007; accepted -
Basal Position of Two New Complete Mitochondrial Genomes of Parasitic
Hua et al. Parasites & Vectors (2018) 11:628 https://doi.org/10.1186/s13071-018-3162-4 RESEARCH Open Access Basal position of two new complete mitochondrial genomes of parasitic Cymothoida (Crustacea: Isopoda) challenges the monophyly of the suborder and phylogeny of the entire order Cong J. Hua1,2, Wen X. Li1, Dong Zhang1,2, Hong Zou1, Ming Li1, Ivan Jakovlić3, Shan G. Wu1 and Gui T. Wang1,2* Abstract Background: Isopoda is a highly diverse order of crustaceans with more than 10,300 species, many of which are parasitic. Taxonomy and phylogeny within the order, especially those of the suborder Cymothoida Wägele, 1989, are still debated. Mitochondrial (mt) genomes are a useful tool for phylogenetic studies, but their availability for isopods is very limited. To explore these phylogenetic controversies on the mt genomic level and study the mt genome evolution in Isopoda, we sequenced mt genomes of two parasitic isopods, Tachaea chinensis Thielemann, 1910 and Ichthyoxenos japonensis Richardson, 1913, belonging to the suborder Cymothoida, and conducted comparative and phylogenetic mt genomic analyses across Isopoda. Results: The complete mt genomes of T. chinensis and I. japonensis were 14,616 bp and 15,440 bp in size, respectively, with the A+T content higher than in other isopods (72.7 and 72.8%, respectively). Both genomes code for 13 protein-coding genes, 21 transfer RNA genes (tRNAs), 2 ribosomal RNA genes (rRNAs), and possess a control region (CR). Both are missing a gene from the complete tRNA set: T. chinensis lacks trnS1 and I. japonensis lacks trnI. Both possess unique gene orders among isopods. -
001-012 Primeras Páginas
PUBLICACIONES DEL INSTITUTO GEOLÓGICO Y MINERO DE ESPAÑA Serie: CUADERNOS DEL MUSEO GEOMINERO. Nº 9 ADVANCES IN TRILOBITE RESEARCH ADVANCES IN TRILOBITE RESEARCH IN ADVANCES ADVANCES IN TRILOBITE RESEARCH IN ADVANCES planeta tierra Editors: I. Rábano, R. Gozalo and Ciencias de la Tierra para la Sociedad D. García-Bellido 9 788478 407590 MINISTERIO MINISTERIO DE CIENCIA DE CIENCIA E INNOVACIÓN E INNOVACIÓN ADVANCES IN TRILOBITE RESEARCH Editors: I. Rábano, R. Gozalo and D. García-Bellido Instituto Geológico y Minero de España Madrid, 2008 Serie: CUADERNOS DEL MUSEO GEOMINERO, Nº 9 INTERNATIONAL TRILOBITE CONFERENCE (4. 2008. Toledo) Advances in trilobite research: Fourth International Trilobite Conference, Toledo, June,16-24, 2008 / I. Rábano, R. Gozalo and D. García-Bellido, eds.- Madrid: Instituto Geológico y Minero de España, 2008. 448 pgs; ils; 24 cm .- (Cuadernos del Museo Geominero; 9) ISBN 978-84-7840-759-0 1. Fauna trilobites. 2. Congreso. I. Instituto Geológico y Minero de España, ed. II. Rábano,I., ed. III Gozalo, R., ed. IV. García-Bellido, D., ed. 562 All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system now known or to be invented, without permission in writing from the publisher. References to this volume: It is suggested that either of the following alternatives should be used for future bibliographic references to the whole or part of this volume: Rábano, I., Gozalo, R. and García-Bellido, D. (eds.) 2008. Advances in trilobite research. Cuadernos del Museo Geominero, 9. -
The Bulletin of Zoological Nomenclature. Vol 12, Part 3
VOLUME 12. Part 3 26if/i June, 1956 pp. 65—96 ; 1 pi. THE BULLETIN OF ZOOLOGICAL NOMENCLATURE The Official Organ of THE INTERNATIONAL COMMISSION ON ZOOLOGICAL NOMENCLATURE Edited by FRANCIS HEMMING, C.M.G., C.B.E. Secretary to the International Commission on Zoological Nomenclature Contents: Notices prescribed by the International Congress of Zoology : Page Date of commencement by the International Commission on Zoo¬ logical Nomenclature of voting on applications published in the Bulletin of Zoological Nomenclature .. .. .. .. .. 65 Notice of the possible use by the International Commission on Zoo¬ logical Nomenclature of its Plenary Powers in certain cases .. 65 (continued outside back wrapper) LONDON: Printed by Order of the International Trust for Zoological Nomenclature and Sold on behalf of the International Commission on Zoological Nomenclature by the International Trust at its Publication Office, 41, Queen's Gate, London, S.W.7 1956 Price Nineteen Shillings IAll rights reserved) Original from and digitized by National University of Singapore Libraries INTERNATIONAL COMMISSION ON ZOOLOGICAL NOMENCLATURE A. The Officers of the Commission Honorary Life President: Dr. Karl Jordan (British Museum (Natural History), Zoological Museum, Tring, Herts, England) President: Professor James Chester Bradley (Cornell University, Ithaca, N.Y., U.S.A.) (12th August 1953) Vice-President: Senhor Dr. Afranio do Amaral (Sao Paulo, Brazil) (12th August 1953) Secretary : Mr. Francis Hemming (London, England) (27th July 1948) B. The Members of the Commission (Arranged in order of precedence by reference to date of election or of most recent re-election, as prescribed by the International Congress of Zoology) Professor H. Boschma (Rijksmuseum van Natuurlijke Historie, Leiden, The Netherlands) (1st January 1947) Senor Dr. -
Mesquite Bugs and Other Insects in the Diet of Pallid Bats in Southeastern Arizona
A peer-reviewed version of this preprint was published in PeerJ on 4 December 2018. View the peer-reviewed version (peerj.com/articles/6065), which is the preferred citable publication unless you specifically need to cite this preprint. Czaplewski NJ, Menard KL, Peachey WD. 2018. Mesquite bugs, other insects, and a bat in the diet of pallid bats in southeastern Arizona. PeerJ 6:e6065 https://doi.org/10.7717/peerj.6065 Mesquite bugs and other insects in the diet of pallid bats in southeastern Arizona Nicholas J Czaplewski Corresp., 1 , Katrina L Menard 2 , William D Peachey 3 1 Section of Vertebrate Paleontology, Oklahoma Museum of Natural History, Norman, Oklahoma, United States of America 2 Section of Recent Invertebrates, Oklahoma Museum of Natural History, Norman, Oklahoma, United States 3 Sonoran Science Solutions, Tucson, Arizona, United States Corresponding Author: Nicholas J Czaplewski Email address: [email protected] The pallid bat (Antrozous pallidus) is a species of arid and semiarid western North America, inhabiting ecoregions ranging from desert to oak and pine forest. Considered primarily insectivorous predators on large arthropods but taking occasional small vertebrate prey, pallid bats were recently shown to be at least seasonally omnivorous; they demonstrate unusual dietary flexibility and opportunism in certain parts of their geographic range and at different times of year. In a few areas they take nectar from cactus flowers and eat cactus fruit pulp and seeds. Until recently mesquite bugs were primarily tropical- subtropical inhabitants of Mexico and Central America but have since occupied the southwestern United States where mesquite trees occur. Pallid bats regularly use night roosts as temporary shelters in which to process and consume large arthropods caught near their foraging areas. -
The Larval Stages of Trilobites
THE LARVAL STAGES OF TRILOBITES. CHARLES E. BEECHER, New Haven, Conn. [From The American Geologist, Vol. XVI, September, 1895.] 166 The American Geologist. September, 1895 THE LARVAL STAGES OF TRILOBITES. By CHARLES E. BEECHEE, New Haven, Conn. (Plates VIII-X.) CONTENTS. PAGE I. Introduction 166 II. The protaspis 167 III. Review of larval stages of trilobites 170 IV. Analysis of variations in trilobite larvae 177 V. Antiquity of the trilobites 181 "VI. Restoration of the protaspis 182 "VII. The crustacean nauplius 186 VIII. Summary 190 IX. References 191 X Explanation of plates 193 I. INTRODUCTION. It is now generally known that the youngest stages of trilobites found as fossils are minute ovate or discoid bodies, not more than one millimetre in length, in which the head por tion greatly predominates. Altogether they present very little likeness to the adult form, to which, however, they are trace able through a longer or shorter series of modifications. Since Barrande2 first demonstrated the metamorphoses of trilobites, in 1849, similar observations have been made upon a number of different genera by Ford,22 Walcott,34':*>':t6 Mat thew,28- 27' 28 Salter,32 Callaway,11' and the writer.4.5-7 The general facts in the ontogeny have thus become well estab lished and the main features of the larval form are fairly well understood. Before the recognition of the progressive transformation undergone by trilobites in their development, it was the cus tom to apply a name to each variation in the number of tho racic segments and in other features of the test. -
Photoreception in the Planktonic Larvae of Two Species of Pullosquilla, a Lysiosquilloid Stomatopod Crustacean
The Journal of Experimental Biology 201, 2481–2487 (1998) 2481 Printed in Great Britain © The Company of Biologists Limited 1998 JEB1576 PHOTORECEPTION IN THE PLANKTONIC LARVAE OF TWO SPECIES OF PULLOSQUILLA, A LYSIOSQUILLOID STOMATOPOD CRUSTACEAN PAMELA A. JUTTE1,*, THOMAS W. CRONIN2,† AND ROY L. CALDWELL1 1Department of Integrative Biology, University of California, Berkeley, CA 94720, USA and 2Department of Biological Sciences, University of Maryland Baltimore County, Baltimore, MD 21250, USA *Present address: Marine Resources Research Institute, South Carolina Department of Natural Resources, PO Box 12559, Charleston, SC 29422-2559, USA †Author for correspondence (e-mail: [email protected]) Accepted 5 June; published on WWW 11 August 1998 Summary Optical microscopy, electron microscopy and which is arrayed in a regular pattern at the distal margin microspectrophotometry were used to characterize of the larval retina. The absorption spectrum of this pigments in the eyes of planktonic larvae of two species of pigment is well matched to the larval rhodopsin, suggesting the lysiosquilloid stomatopod Pullosquilla, P. litoralis and that it acts to screen the rhabdoms from stray light. By P. thomassini, which live sympatrically in French replacing opaque, black screening pigment, the Polynesia. In contrast to the adult retina, which contains a transparent yellow pigment may act together with a blue diverse assortment of visual pigments in the main iridescent layer in the larval retina to reduce the visual rhabdoms, the principal photoreceptors throughout the contrast of the larval eye against downwelling and larval eyes of both species were found to contain a single sidewelling light, while simultaneously acting as a retinal rhodopsin with an absorption maximum (λmax) close to screen. -
Download My Tropic Isle
My Tropic Isle by E J Banfield My Tropic Isle by E J Banfield This eBook was produced by Col Choat Notes: Italics in the book have been capitalised in the eBook. Illustrations in the book have not been included in the eBook. This eBook uses 8-bit text. MY TROPIC ISLE BY E. J. BANFIELD AUTHOR OF "THE CONFESSIONS OF A BEACHCOMBER" T. FISHER UNWIN page 1 / 293 LONDON: ADELPHI TERRACE LEIPSIC: INSELSTRASSE 20 1911 TO MY WIFE "What dost thou in this World? The Wilderness For thee is fittest place." MILTON. "Taught to live The easiest way, nor with perplexing thoughts To interrupt sweet life." MILTON. PREFACE Much of the contents of this book was published in the NORTH QUEENSLAND page 2 / 293 REGISTER, under the title of "Rural Homilies." Grateful acknowledgments are due to the Editor for his frank goodwill in the abandonment of his rights. Also am I indebted to the Curator and Officers of the Australian Museum, Sydney, and specially to Mr. Charles Hedley, F.L.S., for assistance in the identification of specimens. Similarly I am thankful to Mr. J. Douglas Ogilby, of Brisbane, and to Mr. A. J. Jukes-Browne, F.R.S., F.G.S., of Torquay (England). THE AUTHOR. CONTENTS CHAPTER. I. IN THE BEGINNING II. A PLAIN MAN'S PHILOSOPHY III. MUCH RICHES IN A LITTLE ROOM IV. SILENCES V. FRUITS AND SCENTS VI. HIS MAJESTY THE SUN VII. A TROPIC NIGHT VIII. READING TO MUSIC IX. BIRTH AND BREAKING OF CHRISTMAS page 3 / 293 X. THE SPORT OF FATE XI. -
HELCOM Red List
SPECIES INFORMATION SHEET Eurydice pulchra English name: Scientific name: Speckled sea louse Eurydice pulchra Taxonomical group: Species authority: Class: Malacostraca Leach, 1815 Order: Isopoda Family: Cirolanidae Subspecies, Variations, Synonyms: – Generation length: – Past and current threats (Habitats Directive Future threats (Habitats Directive article 17 article 17 codes): codes): Potentially eutrophication (H01.05), Potentially eutrophication (H01.05), contaminant contaminant pollution (H01), construction pollution (H01), construction (D03.03) (D03.03) IUCN Criteria: HELCOM Red List DD – Category: Data Deficient Global / European IUCN Red List Category: Habitats Directive: NE/NE – Protection and Red List status in HELCOM countries: Denmark –/–, Estonia –/–, Finland –/–, Germany –/* (Not threatened, incl. North Sea), Latvia –/–, Lithuania –/–-, Poland –/–, Russia –/–, Sweden –/– Distribution and status in the Baltic Sea region Eurydice pulchra occurs in the Kattegat and along the southern coasts of the Baltic (from the Kiel Bay to the Curonian Lagoon). It is very rare in Germany but occurs more commonly along the Polish exposed coast. It is not known whether the difference between old and new observations indicates a genuine decline or just lack of sampling. Most of the recent records are from the Polish coast. © HELCOM Red List Benthic Invertebrate Expert Group 2013 www.helcom.fi > Baltic Sea trends > Biodiversity > Red List of species SPECIES INFORMATION SHEET Eurydice pulchra Distribution map The georeferenced records of the species compiled from the Danish national database for marine data (MADS), the database of the Leibniz Institute for Baltic Sea Research (IOW) (incl. also part of the Polish literature and monitoring data), and from literature: Demel (1936), Mańkowski (1954), Żmudziński (1982), Hague et al. (1996), and Masłowski (2006). -
An Inventory of Trilobites from National Park Service Areas
Sullivan, R.M. and Lucas, S.G., eds., 2016, Fossil Record 5. New Mexico Museum of Natural History and Science Bulletin 74. 179 AN INVENTORY OF TRILOBITES FROM NATIONAL PARK SERVICE AREAS MEGAN R. NORR¹, VINCENT L. SANTUCCI1 and JUSTIN S. TWEET2 1National Park Service. 1201 Eye Street NW, Washington, D.C. 20005; -email: [email protected]; 2Tweet Paleo-Consulting. 9149 79th St. S. Cottage Grove. MN 55016; Abstract—Trilobites represent an extinct group of Paleozoic marine invertebrate fossils that have great scientific interest and public appeal. Trilobites exhibit wide taxonomic diversity and are contained within nine orders of the Class Trilobita. A wealth of scientific literature exists regarding trilobites, their morphology, biostratigraphy, indicators of paleoenvironments, behavior, and other research themes. An inventory of National Park Service areas reveals that fossilized remains of trilobites are documented from within at least 33 NPS units, including Death Valley National Park, Grand Canyon National Park, Yellowstone National Park, and Yukon-Charley Rivers National Preserve. More than 120 trilobite hototype specimens are known from National Park Service areas. INTRODUCTION Of the 262 National Park Service areas identified with paleontological resources, 33 of those units have documented trilobite fossils (Fig. 1). More than 120 holotype specimens of trilobites have been found within National Park Service (NPS) units. Once thriving during the Paleozoic Era (between ~520 and 250 million years ago) and becoming extinct at the end of the Permian Period, trilobites were prone to fossilization due to their hard exoskeletons and the sedimentary marine environments they inhabited. While parks such as Death Valley National Park and Yukon-Charley Rivers National Preserve have reported a great abundance of fossilized trilobites, many other national parks also contain a diverse trilobite fauna. -
Table of Contents
SPECIAL ISSUE VOLUME 12 NUMBER- 4 AUGUST 2019 Print ISSN: 0974-6455 Online ISSN: 2321-4007 BBRC CODEN BBRCBA www.bbrc.in Bioscience Biotechnology University Grants Commission (UGC) Research Communications New Delhi, India Approved Journal National Conference Special Issue Recent Trends in Life Sciences for Sustainable Development-RTLSSD-2019’ An International Peer Reviewed Open Access Journal for Rapid Publication Published By: Society For Science and Nature Bhopal, Post Box 78, GPO, 462001 India Indexed by Thomson Reuters, Now Clarivate Analytics USA ISI ESCI SJIF 2018=4.186 Online Content Available: Every 3 Months at www.bbrc.in Registered with the Registrar of Newspapers for India under Reg. No. 498/2007 Bioscience Biotechnology Research Communications SPECIAL ISSUE VOL 12 NO (4) AUG 2019 Editors Communication I Insect Pest Control with the Help of Spiders in the Agricultural Fields of Akot Tahsil, 01-02 District Akola, Maharashtra State, India Amit B. Vairale A Statistical Approach to Find Correlation Among Various Morphological 03-11 Descriptors in Bamboo Species Ashiq Hussain Khanday and Prashant Ashokrao Gawande Studies on Impact of Physico Chemical Factors on the Seasonal Distribution of 12-15 Zooplankton in Kapileshwar Dam, Ashti, Dist. Wardha Awate P.J Seasonal Variation in Body Moisture Content of Wallago Attu 16-20 (Siluridae: Siluriformes) Babare Rupali Phytoplanktons of Washim Region (M.S.) India 21-24 Bargi L.A., Golande P.K. and S.D. Rathod Study of Human and Leopard Conflict a Survey in Human Dominated 25-29 Areas of Western Maharashtra Gantaloo Uma Sukaiya Exposure of Chlorpyrifos on Some Biochemical Constituents in Liver and Kidney of Fresh 30-32 Water Fish, Channa punctatus Feroz Ahmad Dar and Pratibha H. -
Paleozoic Life in the Seas
Paleozoic Life in the Seas • Environmental variables to watch – Sea level – Positions of land and sea (continents & oceans) – Climate • Patterns of diversity • Mass extinctions • Cast of characters 1 The “Sepksoski Curve” From Sepkoski, Paleobiology, 1982 2 The Big 5 Mass Extinctions 3 4 From Alroy et al. PNAS (2001) 5 6 7 Cambrian Period 543 - 490 million years ago 8 Cambrian Trilobites 9 Archaeocyathids Cambrian seascape, painting by Zdenek Burian, ca. 1960 10 Ordovician Period 490 to 443 Million Years Ago 11 Ordovician Brachiopods Brachiopods, Ordovician, Ohio Ordovician Corals Rugose Tabulate www.humboldt.edu/~natmus/Exhibits/Life_time/Ordovician.web/55b.jpg 12 Maclurites at Crown Point, Lake Champlain, NY Leviceraurus Asaphus Ordovician Trilobites Isotelus 13 The largest known trilobite Isotelus rex, Late Ordovician, northern Manitoba Triarthrus, Ordovician, New York 14 Kentucky Ordovician Nautiloids Ohio Minnesota 15 Giant nautiloid Rayonnoceras solidiforme Mississippian, Fayetteville, ARK 16 Ordovician crinoids www.emc.maricopa.edu/faculty/ farabee/BIOBK/1ord04b.gif Ordovician vertebrates Harding Sandstone, Utah 17 www.karencarr.com/images/Gallery / gallery_ordovician.jpg Ordovician seascape Ordovician seascape www.pbs.org/wgbh/nova/link/images/ hist_img_03_ordo.jpg 18 Ordovician seascape http://www.ucmp.berkeley.edu/ordovician/ordovicsea.gif Ordovician seascape www.emc.maricopa.edu/faculty/farabee/BIOBK/1ord04b.gif 19 Silurian Period 443 to 417 Million Years Ago 20 Bumastus Arctinurus Silurian Trilobites Dalmanites Eurypterids