DOCSLIB.ORG

Cartilaginous Fishes (Chondrichthyes: Holocephali, Elasmobranchii) of the Bolca Konservat-Lagerstätte, Italy Giuseppe Marramà

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text

Load more

Philadelphia College of Osteopathic Medicine DigitalCommons@PCOM PCOM Scholarly Papers 2017 A Synoptic Review of the Eocene (Ypresian) Cartilaginous Fishes (Chondrichthyes: Holocephali, Elasmobranchii) of the Bolca Konservat-Lagerstätte, Italy Giuseppe Marramà Giorgio Carnevale Andrea Engelbrecht Kerin M. Claeson Philadelphia College of Osteopathic Medicine, [email protected] Roberto Zorzin See next page for additional authors Follow this and additional works at: https://digitalcommons.pcom.edu/scholarly_papers Part of the Medicine and Health Sciences Commons Recommended Citation Marramà, Giuseppe; Carnevale, Giorgio; Engelbrecht, Andrea; Claeson, Kerin M.; Zorzin, Roberto; Fornasiero, Mariagabriella; and Kriwet, Jürgen, "A Synoptic Review of the Eocene (Ypresian) Cartilaginous Fishes (Chondrichthyes: Holocephali, Elasmobranchii) of the Bolca Konservat-Lagerstätte, Italy" (2017). PCOM Scholarly Papers. 1900. https://digitalcommons.pcom.edu/scholarly_papers/1900 This Article is brought to you for free and open access by DigitalCommons@PCOM. It has been accepted for inclusion in PCOM Scholarly Papers by an authorized administrator of DigitalCommons@PCOM. For more information, please contact [email protected]. Authors Giuseppe Marramà, Giorgio Carnevale, Andrea Engelbrecht, Kerin M. Claeson, Roberto Zorzin, Mariagabriella Fornasiero, and Jürgen Kriwet This article is available at DigitalCommons@PCOM: https://digitalcommons.pcom.edu/scholarly_papers/1900 PalZ https://doi.org/10.1007/s12542-017-0387-z REVIEW ARTICLE A synoptic review of the Eocene (Ypresian) cartilaginous fshes (Chondrichthyes: Holocephali, Elasmobranchii) of the Bolca Konservat‑Lagerstätte, Italy Giuseppe Marramà1 · Giorgio Carnevale2 · Andrea Engelbrecht1 · Kerin M. Claeson3 · Roberto Zorzin4 · Mariagabriella Fornasiero5 · Jürgen Kriwet1 Received: 17 March 2017 / Accepted: 2 September 2017 © The Author(s) 2017. This article is an open access publication Abstract Here, we review and discuss the records and taxonomy of the Ypresian (Eocene) chondrichthyans from the famous Bolca Konservat-Lagerstätte in northeastern Italy. Despite the outstanding diversity and the numerous studies focusing on the actinopterygian faunas from Pesciara and Monte Postale, the current knowledge about the systematics, taxonomy and phylogenetic relationships of the cartilaginous fshes from these Eocene sites remains elusive and largely inadequate. The celebrated Eocene Bolca Lagerstätte has yielded several exquisitely preserved articulated remains of chondrichthyan fshes in which delicate structures and soft tissues are preserved, as well as isolated teeth. The cartilaginous fsh assemblage of Bolca comprises at least 17 species-level taxa belonging to 10 families in 6 orders, including selachians (Carcharhiniformes, Lamniformes), batoids (Torpediniformes, Myliobatiformes, Rajiformes) and holocephalans (Chimaeriformes). The occur- rence of holocephalans represented by an isolated fn-spine of the chimeroid Ischyodus in the Bolca assemblage is reported here for the frst time and represents the frst record of chimeroids in the Eocene of Italy and also southern Europe. The Bolca chondrichthyan assemblage is remarkably diferent from those of other contemporaneous Boreal or Tethyan deposits, suggest- ing that its taxonomic composition is largely infuenced by the palaeoenvironmental context. However, this synoptic review also highlights the importance of detailed revisions of all chondrichthyan remains from the Bolca Konservat-Lagerstätten. Keywords Neoselachii · Holocephali · Ypresian · Diversity · Konservat-Lagerstätte · Tethys Kurzfassung Obwohl Knochenfsche in der berühmten eozänen (Ypresium) Bolca-Konservatlagerstätte in NE-Italien äußerst divers sind und in den vergangenen Jahren Gegenstand zahlreicher Studien waren, ist der derzeitige Kenntnisstand über die Systematik, Taxonomie und Phylogenie der Knorpelfsche aus dieser Lagerstätte überraschend gering und ungenau. In dieser Studie geben wir einen Über- blick über die Knorpelfsche der Bolca-Konservatlagerstätte und diskutieren ihre Verbreitung und ihre Taxonomie. Aus den beiden Fundstellen Pesciara und Monte Postale stammen einige sehr gut erhaltene Exemplare, bei denen auch sehr feine Strukturen und Weichgewebe fossilisiert sind, sowie isolierte Zähne. Die Knorpelfschfauna von Bolca umfasst mindestens 17 Arten, die zu zehn Familien und sechs Ordnungen gehören wie Haie (Carcharhiniformes, Lamniformes), Rochen (Torpediniformes, Myliobatiformes, Rajiformes) und Chimären. Chimären sind erstmals für Bolca durch einen isolierten Flossenstachel von Ischyodus belegt, was gleichzeitig der erste Nachweis für Chimären im Eozän von Italien und Süd-Europa ist. Die Knorpelfschassoziation von Bolca unterscheidet sich in ihrer taxonomischen Zusammensetzung aufällig von anderen tethyalen und auch borealen Faunen. Dies lässt vermuten, dass die taxonomische Zusammensetzung im Wesentlichen durch Umweltbedingungen bestimmt ist. Der hier präsentierte synoptische Überblick der Bolca-Knorpelfsche zeigt aber auch deutlich, dass detaillierte Revisionen aller Knorpelf- ischreste der Bolca-Konservatlagerstätte für ein besseres Verständnis dieser wichtigen eozänen Fundstelle dringend nötig sind. Schlüsselwörter Neoselachii · Holocephali · Ypresium · Diversität · Konservat-Lagerstätte · Tethys Handling editor: Adriana López-Arbarello. Extended author information available on the last page of the article Vol.:(0123456789)1 3 G. Marramà et al. Introduction also very strongly biased towards taxa with larger teeth, whereas small teeth are not consistently processed in most The Paleogene (ca. 66–23 Ma) represents a critical interval deposits as results of taphonomic or collecting biases. in the development of the current global climatic patterns. The celebrated Eocene (Ypresian, ca. 50 Ma; Papazzoni With a short-lived thermal maximum that occurred at the et al. 2014a) Bolca Konservat-Lagerstätte from northeastern Paleocene–Eocene boundary (PETM), in turn followed by Italy is one of the few fossiliferous sites in which fossils of extensive greenhouse conditions during the Early Eocene chondrichthyan fshes are exquisitely preserved. In addition to Climatic Optimum, a considerable global warming resulted, isolated teeth, fossils include complete and fully articulated which lasted until the end of the middle Eocene (ca. 37 Ma). skeletal remains, in which delicate mineralised cartilaginous The PETM subsequently was followed by a late Eocene (ca. structures and soft tissues are easily preserved and recogniz- 49–34 Ma) transition from greenhouse to icehouse condi- able. Several recent studies extensively contributed knowledge tions (Zachos et al. 2008). The fnal cooling phase, which of the outstanding palaeobiodiversity of this deposit, with took place at the Eocene–Oligocene boundary (ca. 33.7 Ma), more than 230 described species-level taxa (see Carnevale was characterised by declining atmospheric CO2 content, et al. 2014), belonging to a variety of teleost lineages (e.g., long-term deep-sea cooling and establishment of large Ant- anguilliforms, atheriniforms, aulopiformes, beryciforms, clu- arctic ice sheets, resulting in one of the most dramatic cli- peiforms, lophiiforms, pleuronectiforms, tetraodontiforms and matic shifts in the Cenozoic (see Zachos et al. 2001; Pagani several other percomorph lineages; Blot 1969; Tyler and San- et al. 2005; Lear et al. 2008). These climatic changes, which tini 2002; Bannikov 2004, 2006, 2008; Carnevale and Pietsch persisted into the early Oligocene, resulted in major biotic 2009, 2010, 2011, 2012; Marramà and Carnevale 2015a, b, turnovers in marine and terrestrial faunas and foras (Pro- 2016, 2017a, b; Pfaf et al. 2016; Carnevale et al. 2017). How- thero et al. 2003; Pearson et al. 2008). ever, the diversity of certain groups as well as many aspects of Although the general patterns of abiotic disruptions dur- their evolutionary palaeoecology have been totally neglected ing the Paleogene have been documented extensively (see or underestimated. In particular, most of the selachians and Culver and Rawson 2000) and the fossil record documents batoids from Bolca have not been studied using modern meth- profound changes in both marine and terrestrial ecosystems odological approaches. Consequently, a revisionary study of across the PETM (e.g., Gingerich 2006), little is known the Eocene sharks, skates and rays from the Bolca Lagerstätte about the impact of the global changes on overall biodiver- is warranted. The goal of this paper is therefore to provide an sity, particularly on organisms occupying the higher trophic overview of the chondrichthyan assemblage in the Eocene levels in marine ecosystems. In particular, the evolutionary Bolca Konservat-Lagerstätte, in order to properly defne the and diversity dynamics of cartilaginous fshes (Chondrich- diversity of sharks, skates and rays from this celebrated locality thyes) during the Paleogene Climatic Optimum has received and their palaeoecological role and biogeographic afnities. little attention, mostly due to the fact that there are few Pale- ogene faunas that are not from marginal environments (there Institutional abbreviations: CNHM, Croatian Natural are many in the North Sea Basin) or very poorly dated (e.g., History Museum, Zagreb; MC, Carnegie Museum, Pitts- Morocco). The taxonomy, systematics and evolutionary his- burgh; MCSNV, Museo Civico di Storia Naturale, Verona; tory of the Paleogene chondrichthyans in general are prob- MGP-PD, Museo di Geologia e Paleontologia, Università lematic
Recommended publications
  • University of Birmingham the Mazon Creek Lagerstätte

    University of Birmingham the Mazon Creek Lagerstätte

    University of Birmingham The Mazon Creek Lagerstätte Clements, Thomas; Purnell, Mark; Gabbott, Sarah DOI: 10.1144/jgs2018-088 License: Creative Commons: Attribution (CC BY) Document Version Publisher's PDF, also known as Version of record Citation for published version (Harvard): Clements, T, Purnell, M & Gabbott, S 2018, 'The Mazon Creek Lagerstätte: a diverse late Paleozoic ecosystem entombed within siderite concretions', Geological Society. Journal, vol. 176, pp. 1-11. https://doi.org/10.1144/jgs2018-088 Link to publication on Research at Birmingham portal General rights Unless a licence is specified above, all rights (including copyright and moral rights) in this document are retained by the authors and/or the copyright holders. The express permission of the copyright holder must be obtained for any use of this material other than for purposes permitted by law. •Users may freely distribute the URL that is used to identify this publication. •Users may download and/or print one copy of the publication from the University of Birmingham research portal for the purpose of private study or non-commercial research. •User may use extracts from the document in line with the concept of ‘fair dealing’ under the Copyright, Designs and Patents Act 1988 (?) •Users may not further distribute the material nor use it for the purposes of commercial gain. Where a licence is displayed above, please note the terms and conditions of the licence govern your use of this document. When citing, please reference the published version. Take down policy While the University of Birmingham exercises care and attention in making items available there are rare occasions when an item has been uploaded in error or has been deemed to be commercially or otherwise sensitive.
  • JVP 26(3) September 2006—ABSTRACTS

    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.
  • A Fish Fauna from the Lowermost Bartonian of the Transylvanian Basin, Romania

    A Fish Fauna from the Lowermost Bartonian of the Transylvanian Basin, Romania

    Palaeontologia Electronica palaeo-electronica.org A fish fauna from the lowermost Bartonian of the Transylvanian Basin, Romania Nicolae Trif, Vlad Codrea, and Viorel Arghiuș ABSTRACT A fish fauna newly discovered in the middle Eocene marine sediments cropping out near the village of Luna de Sus, Romania, completes the fossil record of the East- ern European region. Teeth belonging to 15 species of Chondrichthyes and two spe- cies of Actinopterygii are herein recorded from the lowermost Bartonian deposits. These Paleogene fish document a marine tropical environment of medium deep waters in the northwestern area of the Transylvanian Basin. The vertical distributions of extant equivalent taxa allow a sea depth estimation of 100 to 200 m. The warm climate is doc- umented by both the present faunal assemblage and previous palynological studies. It is important to note the presence of the scarcely known and poorly understood pycno- dont species Phacodus punctatus and of the oldest representative of Labridae from this Carpathian area. The diversity of the fauna was found to be average compared to some areas from Western Europe or North Africa, but it falls within the regional diver- sity range of the Eastern European localities. Nicolae Trif. Department of Geology, Faculty of Biology-Geology, Babeş-Bolyai University, 1 Kogălniceanu St., 400084, Cluj-Napoca, Romania and Brukenthal National Museum, Natural History Museum, Sibiu, Romania, 1 Cetății St., Sibiu, 550160, Romania. [email protected] Vlad Codrea. Department of Geology, Faculty of Biology-Geology, Babeş-Bolyai University, 1 Kogălniceanu St., 400084, Cluj-Napoca, Romania. [email protected] Viorel Arghiuș. Environmental Sciences Department, Faculty of Environmental Sciences and Engineering, Babeş-Bolyai University, 30 Fântânele St., 400294, Cluj-Napoca, Romania.
  • Reassessment of Historical Sections from the Paleogene Marine Margin of the Congo Basin Reveals an Almost Complete Absence of Danian Deposits

    Reassessment of Historical Sections from the Paleogene Marine Margin of the Congo Basin Reveals an Almost Complete Absence of Danian Deposits

    Geoscience Frontiers 10 (2019) 1039e1063 HOSTED BY Contents lists available at ScienceDirect China University of Geosciences (Beijing) Geoscience Frontiers journal homepage: www.elsevier.com/locate/gsf Research Paper Reassessment of historical sections from the Paleogene marine margin of the Congo Basin reveals an almost complete absence of Danian deposits Floréal Solé a,*, Corentin Noiret b, Delphine Desmares c, Sylvain Adnet d, Louis Taverne a, Thierry De Putter e, Florias Mees e, Johan Yans b, Thomas Steeman f, Stephen Louwye f, Annelise Folie g, Nancy J. Stevens h, Gregg F. Gunnell i,1, Daniel Baudet e, Nicole Kitambala Yaya j, Thierry Smith a a Royal Belgian Institute of Natural Sciences (RBINS), Operational Directorate Earth and History of Life, Rue Vautier 29, 1000, Brussels, Belgium b University of Namur (UNamur), Department of Geology, Rue de Bruxelles 61, 5000, Namur, Belgium c Sorbonne Université, UPMC Paris 06, UMR 7207 (CR2P), MNHN-UPMC e CNRS, 75005, Paris, France d UMR 5554 e Institut des Sciences de l’Evolution, Université Montpellier, Place E. Bataillon, 34095, Montpellier Cedex 5, France e Royal Museum for Central Africa (RMCA), Geodynamics and Mineral Resources, Leuvensesteenweg 13, 3080, Tervuren, Belgium f Ghent University (UGent), Department of Geology, Krijgslaan 281/S8, 9000, Ghent, Belgium g Royal Belgian Institute of Natural Sciences (RBINS), Heritage Scientific Survey, Rue Vautier 29, 1000, Brussels, Belgium h Ohio University, Department of Biomedical Sciences, Heritage College of Osteopathic Medicine, Irvine Hall 228, Athens, OH, USA i Duke University Lemur Center, Division of Fossil Primates (DFP), 1013 Broad Street, Durham, NC 27705, USA j Centre de Recherches Géologiques et Minières (CRGM), 44, av.
  • Chondrichthyan Fishes (Sharks, Skates, Rays) Announcements

    Chondrichthyan Fishes (Sharks, Skates, Rays) Announcements

    Chondrichthyan Fishes (sharks, skates, rays) Announcements 1. Please review the syllabus for reading and lab information! 2. Please do the readings: for this week posted now. 3. Lab sections: 4. i) Dylan Wainwright, Thursday 2 - 4/5 pm ii) Kelsey Lucas, Friday 2 - 4/5 pm iii) Labs are in the Northwest Building basement (room B141) 4. Lab sections done: first lab this week on Thursday! 5. First lab reading: Agassiz fish story; lab will be a bit shorter 6. Office hours: we’ll set these later this week Please use the course web site: note the various modules Outline Lecture outline: -- Intro. to chondrichthyan phylogeny -- 6 key chondrichthyan defining traits (synapomorphies) -- 3 chondrichthyan behaviors -- Focus on several major groups and selected especially interesting ones 1) Holocephalans (chimaeras or ratfishes) 2) Elasmobranchii (sharks, skates, rays) 3) Batoids (skates, rays, and sawfish) 4) Sharks – several interesting groups Not remotely possible to discuss today all the interesting groups! Vertebrate tree – key ―fish‖ groups Today Chondrichthyan Fishes sharks Overview: 1. Mostly marine 2. ~ 1,200 species 518 species of sharks 650 species of rays 38 species of chimaeras Skates and rays 3. ~ 3 % of all ―fishes‖ 4. Internal skeleton made of cartilage 5. Three major groups 6. Tremendous diversity of behavior and structure and function Chimaeras Chondrichthyan Fishes: 6 key traits Synapomorphy 1: dentition; tooth replacement pattern • Teeth are not fused to jaws • New rows move up to replace old/lost teeth • Chondrichthyan teeth are
  • ESS 345 Ichthyology

    ESS 345 Ichthyology

    ESS 345 Ichthyology Evolutionary history of fishes 12 Feb 2019 (Who’s birthday?) Quote of the Day: We must, however, acknowledge, as it seems to me, that man with all his noble qualities... still bears in his bodily frame the indelible stamp of his lowly origin._______, (1809-1882) Evolution/radiation of fishes over time Era Cenozoic Fig 13.1 Fishes are the most primitive vertebrate and last common ancestor to all vertebrates They start the branch from all other living things with vertebrae and a cranium Chordata Notochord Dorsal hollow nerve cord Pharyngeal gill slits Postanal tail Urochordata Cephalochordata Craniates (mostly Vertebrata) Phylum Chordata sister is… Echinodermata Synapomorphy – They are deuterostomes Fish Evolutionary Tree – evolutionary innovations in vertebrate history Sarcopterygii Chondrichthyes Actinopterygii (fish) For extant fishes Osteichthyes Gnathostomata Handout Vertebrata Craniata Figure only from Berkeley.edu Hypothesis of fish (vert) origins Background 570 MYA – first large radiation of multicellular life – Fossils of the Burgess Shale – Called the Cambrian explosion Garstang Hypothesis 1928 Neoteny of sessile invertebrates Mistake that was “good” Mudpuppy First Vertebrates Vertebrates appear shortly after Cambrian explosion, 530 MYA – Conodonts Notochord replaced by segmented or partially segmented vertebrate and brain is enclosed in cranium Phylogenetic tree Echinoderms, et al. Other “inverts” Vertebrate phyla X Protostomes Deuterostomes Nephrozoa – bilateral animals First fishes were jawless appearing
  • An Introduction to the Classification of Elasmobranchs

    An Introduction to the Classification of Elasmobranchs

    An introduction to the classification of elasmobranchs 17 Rekha J. Nair and P.U Zacharia Central Marine Fisheries Research Institute, Kochi-682 018 Introduction eyed, stomachless, deep-sea creatures that possess an upper jaw which is fused to its cranium (unlike in sharks). The term Elasmobranchs or chondrichthyans refers to the The great majority of the commercially important species of group of marine organisms with a skeleton made of cartilage. chondrichthyans are elasmobranchs. The latter are named They include sharks, skates, rays and chimaeras. These for their plated gills which communicate to the exterior by organisms are characterised by and differ from their sister 5–7 openings. In total, there are about 869+ extant species group of bony fishes in the characteristics like cartilaginous of elasmobranchs, with about 400+ of those being sharks skeleton, absence of swim bladders and presence of five and the rest skates and rays. Taxonomy is also perhaps to seven pairs of naked gill slits that are not covered by an infamously known for its constant, yet essential, revisions operculum. The chondrichthyans which are placed in Class of the relationships and identity of different organisms. Elasmobranchii are grouped into two main subdivisions Classification of elasmobranchs certainly does not evade this Holocephalii (Chimaeras or ratfishes and elephant fishes) process, and species are sometimes lumped in with other with three families and approximately 37 species inhabiting species, or renamed, or assigned to different families and deep cool waters; and the Elasmobranchii, which is a large, other taxonomic groupings. It is certain, however, that such diverse group (sharks, skates and rays) with representatives revisions will clarify our view of the taxonomy and phylogeny in all types of environments, from fresh waters to the bottom (evolutionary relationships) of elasmobranchs, leading to a of marine trenches and from polar regions to warm tropical better understanding of how these creatures evolved.
  • Great White Shark) on Appendix I of the Convention of International Trade in Endangered Species of Wild Fauna and Flora (CITES)

    Great White Shark) on Appendix I of the Convention of International Trade in Endangered Species of Wild Fauna and Flora (CITES)

    Prop. 11.48 Proposal to include Carcharodon carcharias (Great White Shark) on Appendix I of the Convention of International Trade in Endangered Species of Wild Fauna and Flora (CITES) A. PROPOSAL ..............................................................................................3 B. PROPONENT............................................................................................3 C. SUPPORTING STATEMENT....................................................................3 1. Taxonomy.........................................................................................................................3 1.1 Class.................................................................................................................................... 1.2 Order................................................................................................................................... 1.3 Family ................................................................................................................................. 1.4 Species ................................................................................................................................ 1.5 Scientific Synonyms............................................................................................................. 1.6 Common Names .................................................................................................................. 2. Biological Parameters......................................................................................................3
  • New Chondrichthyans from Bartonian-Priabonian Levels of Río De Las Minas and Sierra Dorotea, Magallanes Basin, Chilean Patagonia

    New Chondrichthyans from Bartonian-Priabonian Levels of Río De Las Minas and Sierra Dorotea, Magallanes Basin, Chilean Patagonia

    Andean Geology 42 (2): 268-283. May, 2015 Andean Geology doi: 10.5027/andgeoV42n2-a06 www.andeangeology.cl PALEONTOLOGICAL NOTE New chondrichthyans from Bartonian-Priabonian levels of Río de Las Minas and Sierra Dorotea, Magallanes Basin, Chilean Patagonia *Rodrigo A. Otero1, Sergio Soto-Acuña1, 2 1 Red Paleontológica Universidad de Chile, Laboratorio de Ontogenia y Filogenia, Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Santiago, Chile. [email protected] 2 Área de Paleontología, Museo Nacional de Historia Natural, Casilla 787, Santiago, Chile. [email protected] * Corresponding author: [email protected] ABSTRACT. Here we studied new fossil chondrichthyans from two localities, Río de Las Minas, and Sierra Dorotea, both in the Magallanes Region, southernmost Chile. In Río de Las Minas, the upper section of the Priabonian Loreto Formation have yielded material referable to the taxa Megascyliorhinus sp., Pristiophorus sp., Rhinoptera sp., and Callorhinchus sp. In Sierra Dorotea, middle-to-late Eocene levels of the Río Turbio Formation have provided teeth referable to the taxa Striatolamia macrota (Agassiz), Palaeohypotodus rutoti (Winkler), Squalus aff. weltoni Long, Carcharias sp., Paraorthacodus sp., Rhinoptera sp., and indeterminate Myliobatids. These new records show the presence of common chondrichtyan diversity along most of the Magallanes Basin. The new record of Paraorthacodus sp. and P. rutoti, support the extension of their respective biochrons in the Magallanes Basin and likely in the southeastern Pacific. Keywords: Cartilaginous fishes, Weddellian Province, Southernmost Chile. RESUMEN. Nuevos condrictios de niveles Bartoniano-priabonianos de Río de Las Minas y Sierra Dorotea, Cuenca de Magallanes, Patagonia Chilena. Se estudiaron nuevos condrictios fósiles provenientes de dos localidades, Río de Las Minas y Sierra Dorotea, ambas en la Región de Magallanes, sur de Chile.
  • Vicenza, Italia Settentrionale) (Decapoda, Stomatopoda, Isopoda)

    Vicenza, Italia Settentrionale) (Decapoda, Stomatopoda, Isopoda)

    CCITTÀITTÀ DDII MMONTECCHIOONTECCHIO MAGGIOREMAGGIORE MMUSEOUSEO DDII AARCHEOLOGIARCHEOLOGIA E SCIENZESCIENZE NNATURALIATURALI ““G.G. ZZANNATO”ANNATO” CLLAUDIOAUDIO BEESCHINSCHIN, ANNTONIOTONIO DE ANNGELIGELI, ANNDREADREA CHHECCHIECCHI, GIIANNINOANNINO ZAARANTONELLORANTONELLO CCROSTACEIROSTACEI DELDEL GGIACIMENTOIACIMENTO EEOCENICOOCENICO DDII GGROLAROLA PPRESSORESSO SSPAGNAGOPAGNAGO DDII CORNEDOCORNEDO VICENTINOVICENTINO ((VICENZA,VICENZA, ITALIAITALIA SETTENTRIONALE)SETTENTRIONALE) ((DECAPODA,DECAPODA, STOMATOPODA,STOMATOPODA, ISOPODA)ISOPODA) MONTECCHIO MAGGIORE (VICENZA) 2012 Iniziativa realizzata con il contributo della Regione del Veneto Museo di Archeologia e Scienze Naturali “G. Zannato” Sistema Museale Agno-Chiampo Città di Montecchio Maggiore Associazione Amici del Museo Zannato Montecchio Maggiore Copyright © Museo di Archeologia e Scienze Naturali “G. Zannato” Piazza Marconi, 15 36075 Montecchio Maggiore (Vicenza) Tel.-Fax 0444 492565 E-mail: [email protected] ISBN 978-88-900625-2-0 Casa editrice Cooperativa Tipografica Operai - Vicenza Le riproduzioni dei beni di proprietà dello Stato Italiano sono state realizzate su concessione del Ministero per i Beni e le Attività Culturali; è vietata l’ulteriore riproduzione e duplicazione con qualsiasi mezzo. In copertina: disegni di A. De Angeli ©. Claudio BesChin, antonio de angeli, andrea CheCChi, giannino Zarantonello CROSTACEI DEL GIACIMENTO EOCENICO DI GROLA PRESSO SPAGNAGO DI CORNEDO VICENTINO (VICENZA, ITALIA SETTENTRIONALE) (DECAPODA, STOMATOPODA, ISOPODA)
  • Transposable Elements and Teleost Migratory Behaviour

    Transposable Elements and Teleost Migratory Behaviour

    International Journal of Molecular Sciences Article Transposable Elements and Teleost Migratory Behaviour Elisa Carotti 1,†, Federica Carducci 1,†, Adriana Canapa 1, Marco Barucca 1,* , Samuele Greco 2 , Marco Gerdol 2 and Maria Assunta Biscotti 1 1 Department of Life and Environmental Sciences, Polytechnic University of Marche, Via Brecce Bianche, 60131 Ancona, Italy; [email protected] (E.C.); [email protected] (F.C.); [email protected] (A.C.); [email protected] (M.A.B.) 2 Department of Life Sciences, University of Trieste, Via L. Giorgieri, 5-34127 Trieste, Italy; [email protected] (S.G.); [email protected] (M.G.) * Correspondence: [email protected] † Equal contribution. Abstract: Transposable elements (TEs) represent a considerable fraction of eukaryotic genomes, thereby contributing to genome size, chromosomal rearrangements, and to the generation of new coding genes or regulatory elements. An increasing number of works have reported a link between the genomic abundance of TEs and the adaptation to specific environmental conditions. Diadromy represents a fascinating feature of fish, protagonists of migratory routes between marine and fresh- water for reproduction. In this work, we investigated the genomes of 24 fish species, including 15 teleosts with a migratory behaviour. The expected higher relative abundance of DNA transposons in ray-finned fish compared with the other fish groups was not confirmed by the analysis of the dataset considered. The relative contribution of different TE types in migratory ray-finned species did not show clear differences between oceanodromous and potamodromous fish. On the contrary, a remarkable relationship between migratory behaviour and the quantitative difference reported for short interspersed nuclear (retro)elements (SINEs) emerged from the comparison between anadro- mous and catadromous species, independently from their phylogenetic position.
  • Papers in Press

    Papers in Press

    Papers in Press “Papers in Press” includes peer-reviewed, accepted manuscripts of research articles, reviews, and short notes to be published in Paleontological Research. They have not yet been copy edited and/or formatted in the publication style of Paleontological Research. As soon as they are printed, they will be removed from this website. Please note they can be cited using the year of online publication and the DOI, as follows: Humblet, M. and Iryu, Y. 2014: Pleistocene coral assemblages on Irabu-jima, South Ryukyu Islands, Japan. Paleontological Research, doi: 10.2517/2014PR020. doi:10.2517/2018PR004 The Late Cretaceous chimaeroid fish, Ischyodus bifurcatus Case, 1978 (Chondrichthyes: Holocephali), from California, USA, and its paleobiogeographical significance EVANAccepted D. JOHNSON-RANSOM1, EVGENY V. POPOV2,3, THOMAS A. DEMÉRÉ4, AND KENSHU SHIMADA1,5,6 1Department of Biological Sciences, DePaul University, 2325 North Clifton Avenue, Chicago, Illinois 60614, USA (e-mail: [email protected]) 2Department of Paleontology, Geological Faculty, Saratov State University, 83, Astrakhanskaya Street, Saratov 410012, Russia 3Institute of Geology and Petroleum Technology,manuscript Kazan Federal University, Kremlevskaya Str. 4/5, 420008 Kazan, Russia 4Department of Paleontology, San Diego Natural History Museum, 1788 El Prado, San Diego, California 92101, USA 5Department of Environmental Science and Studies, DePaul University, 1110 West Belden Avenue, Chicago, Illinois 60614, USA 6Sternberg Museum of Natural History, Fort Hays State University, 3000 Sternberg Drive, Hays, Kansas 67601, USA Abstract. A nearly complete right mandibular tooth plate of Ischyodus bifurcatus Case (Holocephali: Chimaeroidei) is reported from the Point Loma Formation (upper Campanian) of the Upper Cretaceous Rosario Group in southern California, USA.