DOCSLIB.ORG

Muricidae (Mollusca, Neogastropoda)

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Muricidae (Mollusca, Neogastropoda) DIPARTIMENTO DI BIOLOGIA E BIOTECNOLOGIE “CHARLES DARWIN” UNIVERSITÀ DI ROMA “LA SAPIENZA” CORSO DI DOTTORATO IN BIOLOGIA ANIMALE XXIII CICLO (2007 – 2010) Andrea Barco TESI DI DOTTORATO DI RICERCA I MURICIDAE (MOLLUSCA, NEOGASTROPODA): FILOGENESI MOLECOLARE, EVOLUZIONE MORFOLOGICA ED ECOLOGIA TROFICA PhD Dissertation THE MURICIDAE (MOLLUSCA, NEOGASTROPODA): MOLECULAR PHYLOGENY, MORPHOLOGICAL EVOLUTION AND TROPHIC ECOLOGY Roma, 2010 0 1 SOMMARIO RIASSUNTO 5 ABSTRACT 7 1 INTRODUZIONE 11 1.1 FILOGENESI E CLASSIFICAZIONE DEI MURICIDAE 12 1.1.1 CRONOLOGIA DELLA CLASSIFICAZIONE TRADIZIONALE 12 1.1.2 RECENTI IPOTESI FILOGENETICHE 13 1.2 LA DIVERSIFICAZIONE DEI NEOGASTEROPODI E L’ORIGINE DEI MURICIDAE 19 1.3 LA RADULA DEI MURICIDI E IL SUO ROLO NELLA PREDAZIONE 23 1.3.1 LA MORFOLOGIA RADULARE 23 1.3.2 LA STRATEGIA TROFICA 27 1.4 OBIETTIVI 30 2 MATERIALI E METODI 31 2.1 RACCOLTA E GESTIONE DEL CAMPIONE 31 2.2 ESTRAZIONE E AMPLIFICAZIONE DEL DNA 33 2.3 ESTRAZIONE E PREPARAZIONE DELLE RADULE 34 2.4 ANALISI DEI DATI 35 2.4.1 RAPPRESENTATIVITÀ FILOGENETICA DEL CAMPIONE 35 2.4.2 ANALISI DELLE SEQUENZE 36 2.4.3 ANALISI FILOGENETICHE DEL DATASET MOLECOLARE 38 2.4.4 DATAZIONE DEI CLADI CON UN OROLOGIO MOLECOLARE 39 2.4.5 ANALISI FILOGENETICHE DEL DATASET MORFOLOGICO 40 2.4.6 ANALISI COMPARATIVA DELLE STRATEGIE TROFICHE 40 3 RISULTATI 49 3.1 RAPPRESENTATIVITÀ FILOGENETICA DEL CAMPIONE 49 3.2 ANALISI DEL DATASET MOLECOLARE 50 3.2.1 ANALISI DELLE SEQUENZE 50 3.2.2 ANALISI DEI SINGOLI GENI 50 3.2.3 SCELTA DELLO SCHEMA DI PARTIZIONE E RISULTATI DELL‟ANALISI BAYESIANA 51 3.2.4 STIMA DELLE DATAZIONI DEI CLADI 54 3.3 MORFOLOGIA RADULARE 56 3.3.1 DESCRIZIONE DELLA MORFOLOGIA RADULARE 56 3.3.2 ANALISI CLADISTICA DEI CARATTERI MORFOLOGICI 65 3.3.3 ANALISI COMPARATIVA DELLE STRATEGIE TROFICHE 67 2 4 DISCUSSIONE 69 4.1 FILOGENESI DEI MURICIDAE 69 4.1.1 LA CLASSIFICAZIONE DI CORALLIOPHILINAE, RAPANINAE ED ERGALATAXINAE 69 4.1.2 FILOGENESI DELLE SOTTOFAMIGLIE 70 4.2 RECORD FOSSILE E RADIAZIONE DEI MURICIDI 76 4.2.1 FILOGENESI DEI MURICIDAE E CONGRUENZE RISPETTO AL RECORD FOSSILE 76 4.3 MORFOLOGIA RADULARE 79 4.3.1 CARATTERISTICHE RADULARI DELLE SOTTOFAMIGLIE 79 4.3.2 UTILITÀ TASSONOMICA DELLA RADULA 85 4.3.3 PATTERN DI EVOLUZIONE RADULARE 86 4.3.4 ECOLOGIA TROFICA E ANALISI COMPARATIVA 89 CONCLUSIONI E PROSPETTIVE 95 BIBLIOGRAFIA 97 APPENDICI 113 RINGRAZIAMENTI 148 3 4 Riassunto I muricidi sono un gruppo di gasteropodi predatori composto da più di 1600 specie conosciute, sono tra i principali componenti delle comunità bentoniche e rivestono importanti interessi commerciali in alcune regioni del mondo. La loro origine risale al periodo di grande diversificazione noto come “Rivoluzione Marina del Mesozoico”, nel quale i predatori di questa famiglia cominciarono a diffondersi grazie alla spinta evolutiva fornita dall‟efficienza della loro strategia trofica. Le linee filetiche appartenenti a questa radiazione sono suddivise in dieci sottofamiglie, identificate tradizionalmente dalla morfologia cochigliare e, soprattutto, da quella radulare. La radula, infatti, potrebbe aver rivestito il ruolo di novità evolutiva nell‟emergenza delle varie linee filetiche, grazie al suo diretto coinvolgimento nella predazione. La grande diversificazione morfologica ed ecologica permette di utilizzare questi gasteropodi come modello di studio per l‟evoluzione degli adattamenti trofici, ma le conoscenze a disposizione, soprattutto a livello filogenetico, sono ancora insufficienti per consentire la formulazione d‟ipotesi robuste. Lo scopo di questo studio è gettare le basi per la definizione di un‟ipotesi evolutiva per i muricidi. Per questo motivo è stata costruita una filogenesi molecolare, ed è stata utilizzata come riferimento per analizzare le morfologie radulari, le diverse ecologie trofiche e gli eventi che potrebbero averne promosso la diversificazione. Utilizzando un dataset rappresentativo, è stata costruita la prima filogenesi molecolare contenente tutte le sottofamiglie di muricidi, con la quale è stata definita una base per il rinnovamento della classificazione. La filogenesi ha confermato la monofilia delle sottofamiglie Coralliophilinae, Ergalataxinae, Rapaninae, Typhinae e Haustrinae, in accordo con la classificazione tradizionale. La polifilia delle Trophoninae è stata suggerita in studi precedenti, e i dati molecolari hanno evidenziato l‟esistenza di due linee filetiche indipendenti in questa sottofamiglia. Le Ocenebrinae sono monofiletiche solamente con l‟esclusione del genere Vitularia. A differenza della classificazione tradizionale, le Muricinae e Muricopsinae, le sottofamiglie più rappresentative, non sono monofiletiche. Un‟analisi preliminare, condotta calibrando un orologio molecolare, ha fornito delle datazioni parzialmente discordanti rispetto all‟apparizione delle sottofamiglie nel record fossile. In alcune linee filetiche (principalmente nelle Coralliophilinae) l‟elevato tasso di mutazione può aver determinato una incorretta stima dell‟origine del clade. 5 Nell‟analisi morfologica sono state esaminate, descritte confrontate con la filogenesi molecolare le radule di specie appartenenti a nove delle dieci sottofamiglie. Questo esame ha messo in evidenza molti caratteri trascurati nelle classificazioni tradizionali. Dalla descrizione sono stati ricavati 20 caratteri morfologici utilizzati in due analisi cladistiche, le quali hanno messo in evidenza la presenza di un segnale filogenetico. Nonostante sia stata frequentemente messa in discussione, la morfologia radulare mostra un buon livello di utilità filogenetica se associata ad altri caratteri (ad esempio anatomici). Utilizzando un metodo comparativo, la filogenesi molecolare è stata confrontata con le strategie trofiche conosciute in alcune sottofamiglie, in modo da formulare un‟ipotesi sulla loro evoluzione. I muricidi sono caratterizzati da una grande diversificazione delle tecniche predatorie, dalla capicità di modificare strategia secondo le condizioni ecologiche e dalla variabilità nella scelta delle prede. Questa diversità, probabilmente assente nell‟ipotetico antenato comune, comparve indipendente nelle linee filetiche della famiglia. 6 Abstract The family Muricidae is a group of predatory gastropods including more than 1600 species, which makes this family one of the major components of benthic communities. It also has economic interest in some part of the world. The origin of muricids dates back to the „Mesozoic Marine Revolution‟, a time of major faunal diversification when these predators started to radiate under the evolutionary advantage given by their efficient trophic strategy. The lineages originating from this radiation are divided in ten subfamilies, traditionally identified by shell morphology and especially by radular characters. Due to its major role in predation, muricid radula might have been the evolutionary novelty promoting the origin of the lineages. Due to their large morphological and ecological diversification, these gastropods are a good model to study the evolution of trophic adaptation. The main goal of this study is to prepare the basis for an evolutionary hypothesis for the muricids. A molecular phylogeny has been obtained to define this framework, and has been used to analyse radular morphologies, trophic ecology, and purported causes of their diversification. The molecular phylogeny has been obtained by a representative dataset of all the subfamilies, and proposed as a base to renew their classification. This phylogeny supports the monophyly of Coralliophilinae, Ergalataxinae, Rapaninae, Typhinae and Haustrinae in agreement with the traditional classification. Trophoninae are polyphyletic, as proposed in previous studies, and include at least two independent lineages, while Ocenebrinae are monophyletic with the exclusion of the genus Vitularia. Respect to the traditional classification, Muricinae and Muricopsinae, the most representative subfamilies, are not monophyletic. A preliminary molecular clock analysis estimated clade datations partially incongruent respect to the appearance in the fossil record. Some lineages (especially Coralliophilinae) are characterized by a high mutation rate wich could be the cause of such incongruence. In the morphological analysis were examinated, describede and compared with the molecular phylogeny the radulae of species from nine of the ten subfamilies. This part evidenced many characters overlooked in previous descriptions. 20 morphological characters were extracted and used in two cladistic analyses. These preliminary studies evidenced the presence of a phylogenetic signal in radular morphology, supporting the taxonomic importance of this structure for muricids. Molecular phylogeny has been compared with know trophic strategies of several lineages using a comparative method. Muricids show a wide diversification in predatory techniques, ability 7 to switch strategies depending on ecological conditions, and variability in prey selection. This diversity, likely absent in the hypothetic common ancestor, appeared independently in the lineages. 8 Filogenesi molecolare dei Muricidae (Mollusca, Neogastropoda) e diversità morfologica della conchiglia. Molecular phylogeny of the Muricidae (Mollusca, Neogastropoda) and morphological diversity of shells. 9 10 1 Introduzione I molluschi sono il phylum a cui appartiene il maggior numero di specie nell‟ambiente marino (Bouchet, 2006), la cui classe più rappresentativa è quella dei Gastropoda. I neogasteropodi sono l‟ordine più diversificato, composto da oltre 10.000 specie viventi quasi
Load more

Recommended publications
  • The Recent Molluscan Marine Fauna of the Islas Galápagos
    THE FESTIVUS ISSN 0738-9388 A publication of the San Diego Shell Club Volume XXIX December 4, 1997 Supplement The Recent Molluscan Marine Fauna of the Islas Galapagos Kirstie L. Kaiser Vol. XXIX: Supplement THE FESTIVUS Page i THE RECENT MOLLUSCAN MARINE FAUNA OF THE ISLAS GALApAGOS KIRSTIE L. KAISER Museum Associate, Los Angeles County Museum of Natural History, Los Angeles, California 90007, USA 4 December 1997 SiL jo Cover: Adapted from a painting by John Chancellor - H.M.S. Beagle in the Galapagos. “This reproduction is gifi from a Fine Art Limited Edition published by Alexander Gallery Publications Limited, Bristol, England.” Anon, QU Lf a - ‘S” / ^ ^ 1 Vol. XXIX Supplement THE FESTIVUS Page iii TABLE OF CONTENTS INTRODUCTION 1 MATERIALS AND METHODS 1 DISCUSSION 2 RESULTS 2 Table 1: Deep-Water Species 3 Table 2: Additions to the verified species list of Finet (1994b) 4 Table 3: Species listed as endemic by Finet (1994b) which are no longer restricted to the Galapagos .... 6 Table 4: Summary of annotated checklist of Galapagan mollusks 6 ACKNOWLEDGMENTS 6 LITERATURE CITED 7 APPENDIX 1: ANNOTATED CHECKLIST OF GALAPAGAN MOLLUSKS 17 APPENDIX 2: REJECTED SPECIES 47 INDEX TO TAXA 57 Vol. XXIX: Supplement THE FESTIVUS Page 1 THE RECENT MOLLUSCAN MARINE EAUNA OE THE ISLAS GALAPAGOS KIRSTIE L. KAISER' Museum Associate, Los Angeles County Museum of Natural History, Los Angeles, California 90007, USA Introduction marine mollusks (Appendix 2). The first list includes The marine mollusks of the Galapagos are of additional earlier citations, recent reported citings, interest to those who study eastern Pacific mollusks, taxonomic changes and confirmations of 31 species particularly because the Archipelago is far enough from previously listed as doubtful.
    [Show full text]
  • Spinucella a New Genus of Miocene to Pleistocene , Muricid Gastropods from the Eastern Atlantic
    Contr. Tert. Quatern. Geol. 30(1-2) 19-27 1 tab., 1 pi. Leiden, June 1993 Spinucella a new genus of Miocene to Pleistocene , muricid gastropods from the eastern Atlantic Geerat J. Vermeij University of California Davis, U.S.A. — new of Miocene Pleistocene muricid from the Atlantic. Contr. Tert. Vermeij, GeeratJ. Spinucella, a genus to gastropods eastern Quatern. Geol., 30(1-2): 19-27, 1 tab., 1 pi. Leiden, June 1993. The muricid is for de C. 1825 from the Pliocene of the new gastropod genus Spinucella proposed Purpura tetragonaJ. Sowerby, (type species), North Sea Basin, and for several other early Miocene to late Pleistocene species from southern Europe, North Africa, and southern Africa. The is characterised the of labral on the of the shell and reticulate of genus by presence a spine outer lip by sculpture. Species and Acanthinucella Cooke, 1918. The Spinucella closely resemble members ofNucella Röding, 1798, Acanthina Fischer von Waldheim, 1807, ofthat in the eastern Pacific Acanthina andAcanthinucella. Withthe removal of labral spine of Spinucellawas probably evolved independendy from where authors have the the time of arrival of Nucella in the North Atlantic from the S. tetragona Nucella, many recent placed species, North Pacific was late Pliocene, rather than middle Pliocene. — words Key Spinucella, new genus, Acanthina, Nucella, Neogene, biogeography. Prof. Dr G.J. Vermeij, Department of Geology, University of California, Davis, CA 95616, U.S.A. Contents 1956; Glibert, 1959, 1963). In fact, Glibert (1959) considered N. tetragona to be ancestral to N. lapillus, Introduction 19 p. the two species being linked by the late Pliocene 20 Systematics p.
    [Show full text]
  • Of Golfo Dulce, on the Pacific Coast of Costa Rica 2.5 1994
    Rev. Diol. Trop. 46. Supl. 6: 263-270, 19911 www.ucr.K.I:I' SIIORTNOTE Preliminary check-list of the marine, shelled gastropods (Mollusca) of Golfo Dulce, on the Pacific coast of Costa Rica Tore Hoisa:ter University or Dergen. Department of Fishcr�s and Marine Biology. ltoytekTlOlogi5Cnten:l.N·5020 Oergen. Norway. E.mail:.ton:[email protected] (Re<:. 10-)(11-97. Rey. 26·111·911. Acep. II·XI-911) Abslrfltl: Based on partly l'O'orked up material from three brief eolleetinll eJCcursions to the peninsular sOOn: of Oolfo Dulce, 252 species of $hclled gastropods, mostly prosobranehs and pyramidcllids. h.a,·e bc-c:n identified. This being the first n:pon on intenidal and shallow water gastropods from Ihe gulf, the list may be taken as a preliminary check list of this fauna clement from Golfo Dulce. Only parlly soned material from IV.o additional trips to the gnlf contains It leasllOO addilional5pec�s nOI yet identified. Key ....or4.: Shelled �� mollusks, che" list, Golfo Dulce. The benthic fauna of Golfo Dulce is known Only the material from t!.c two first years mainly from the results from the samples have been worked up so far. Out of a total of taken during the RN Victor Hensen (1993- 61 samples in all of Costa Rica. 20 separate 1994) expedition to the Pacific coasl ofCosla collections of gastropods were taken, all of Rica. The mollusks from that expedition has them from the SW shore of the Golfo Dulce. been reponed on byCruz (1996). The samples were all taken by beam trawl, mesh size 2.5 Localities.
    [Show full text]
  • Mollusks of Manuel Antonio National Park, Pacific Costa Rica
    Rev. Biol. Trop. 49. Supl. 2: 25-36, 2001 www.rbt.ac.cr, www.ucr.ac.cr Mollusks of Manuel Antonio National Park, Pacific Costa Rica Samuel Willis 1 and Jorge Cortés 2-3 1140 East Middle Street, Gettysburg, Pennsylvania 17325, USA. 2Centro de Investigación en Ciencias del Mar y Limnología (CIMAR), Universidad de Costa Rica, 2060 San José, Costa Rica. FAX: (506) 207-3280. E-mail: [email protected] 3Escuela de Biología, Universidad de Costa Rica, 2060 San José, Costa Rica. (Received 14-VII-2000. Corrected 23-III-2001. Accepted 11-V-2001) Abstract: The mollusks in Manuel Antonio National Park on the central section of the Pacific coast of Costa Rica were studied along thirty-six transects done perpendicular to the shore, and by random sampling of subtidal environments, beaches and mangrove forest. Seventy-four species of mollusks belonging to three classes and 40 families were found: 63 gastropods, 9 bivalves and 2 chitons, during this study in 1995. Of these, 16 species were found only as empty shells (11) or inhabited by hermit crabs (5). Forty-eight species were found at only one locality. Half the species were found at one site, Puerto Escondido. The most diverse habitat was the low rocky intertidal zone. Nodilittorina modesta was present in 34 transects and Nerita scabricosta in 30. Nodilittorina aspera had the highest density of mollusks in the transects. Only four transects did not clustered into the four main groups. The species composition of one cluster of transects is associated with a boulder substrate, while another cluster of transects associates with site.
    [Show full text]
  • “Patrones Filogeográficos En El Gastrópodo Marino Acanthina
    ;6<=6 !"# $ %&'(()*+ ,##&- -. / $$023 4 56567 6 899:2 Agradecimientos Quiero agradecer a las personas que han aportado en mi formación de profesional y más como persona, y que han hecho que este proceso responda a mis expectativas y culmine de buena manera a través de la presente tesis de investigación. En primer lugar quiero agradecer de forma especial a mi núcleo familiar por su apoyo incondicional en todos mis actos (papá, mamá y Tania), destacando que en gran parte, gracias a ellos eh logrado cumplir este proceso como una de mis metas... a ellos dedico este trabajo y dedicare muchos mas. Por el lado académico agradecer y destacar a Leyla por ser la guía principal de mi tesis y en esta ultima etapa de formación como profesional ayudarme a desarrollar nuevas temáticas y actitudes personales, además mención especial para el espacio físico y apoyo logístico que me otorgo, y que permitieron el desarrollo de esta tesis de investigación, a Roger por su activa participación directa, como copatrocinante y en mis primeras asistencias a congresos, y a Antonio por sumarse a mi tesis, colaborando y mostrando siempre buena disposición a pesar de la distancia. También de cerca destaco el apoyo de mi polola (Katty), de mi círculo cercano de primos y mis amigos de barrio, y a mis compañeros de laboratorio: Daniela, Chalo, Jano y Zambra con los cuales afrontamos esta etapa en tiempos similares apoyándonos mutuamente. A todos... Gracias... 2 >; > 6 2 ! " # $%& " ' &"% ( "& ) &*%* +, -./""&
    [Show full text]
  • Márcia Alexandra the Course of TBT Pollution in Miranda Souto the World During the Last Decade
    Márcia Alexandra The course of TBT pollution in Miranda Souto the world during the last decade Evolução da poluição por TBT no mundo durante a última década DECLARAÇÃO Declaro que este relatório é integralmente da minha autoria, estando devidamente referenciadas as fontes e obras consultadas, bem como identificadas de modo claro as citações dessas obras. Não contém, por isso, qualquer tipo de plágio quer de textos publicados, qualquer que seja o meio dessa publicação, incluindo meios eletrónicos, quer de trabalhos académicos. Márcia Alexandra The course of TBT pollution in Miranda Souto the world during the last decade Evolução da poluição por TBT no mundo durante a última década Dissertação apresentada à Universidade de Aveiro para cumprimento dos requisitos necessários à obtenção do grau de Mestre em Toxicologia e Ecotoxicologia, realizada sob orientação científica do Doutor Carlos Miguez Barroso, Professor Auxiliar do Departamento de Biologia da Universidade de Aveiro. O júri Presidente Professor Doutor Amadeu Mortágua Velho da Maia Soares Professor Catedrático do Departamento de Biologia da Universidade de Aveiro Arguente Doutora Ana Catarina Almeida Sousa Estagiária de Pós-Doutoramento da Universidade da Beira Interior Orientador Carlos Miguel Miguez Barroso Professor Auxiliar do Departamento de Biologia da Universidade de Aveiro Agradecimentos A Deus, pela força e persistência que me deu durante a realização desta tese. Ao apoio e a força dados pela minha família para a realização desta tese. Á Doutora Susana Galante-Oliveira, por toda a aprendizagem científica, paciência e pelo apoio que me deu nos momentos mais difíceis ao longo deste percurso. Ao Sr. Prof. Doutor Carlos Miguel Miguez Barroso pela sua orientação científica.
    [Show full text]
  • Bioseries 06 2007.Pdf
    Invasive alien flora and fauna in South Africa: expertise and bibliography by Charles F. Musil & Ian A.W. Macdonald Pretoria 2007 SANBI Biodiversity Series The South African National Biodiversity Institute (SANBI) was established on 1 September 2004 through the signing into force of the National Environmental Management: Biodiversity Act (NEMBA) No. 10 of 2004 by President Thabo Mbeki. The Act expands the mandate of the former National Botanical Institute to include responsibilities relating to the full diversity of South Africa’s fauna and flora, and builds on the internationally respected programmes in conservation, research, education and visitor services developed by the National Botanical Institute and its predecessors over the past century. The vision of SANBI is to be the leading institution in biodiversity science in Africa, facilitating conservation, sustainable use of living resources, and human wellbeing. SANBI’s mission is to promote the sustainable use, conservation, appreciation and enjoyment of the exceptionally rich biodiversity of South Africa, for the benefit of all people. SANBI Biodiversity Series publishes occasional reports on projects, technologies, workshops, symposia and other activities initiated by or executed in partnership with SANBI. Technical editor: Gerrit Germishuizen and Emsie du Plessis Design & layout: Daleen Maree Cover design: Sandra Turck The authors: C.F. Musil—Senior Specialist Scientist, Global Change & Biodiversity Program, South African National Biodiversity Institute, Private Bag X7, Claremont, 7735 ([email protected]) I.A.W. Macdonald—Extraordinary Professor, Sustainability Institute, School of Public Management and Planning, Stellenbosch University ([email protected]) How to cite this publication MUSIL, C.F. & MACDONALD, I.A.W. 2007. Invasive alien flora and fauna in South Africa: expertise and bibliography.
    [Show full text]
  • ABSTRACT Title of Dissertation: PATTERNS IN
    ABSTRACT Title of Dissertation: PATTERNS IN DIVERSITY AND DISTRIBUTION OF BENTHIC MOLLUSCS ALONG A DEPTH GRADIENT IN THE BAHAMAS Michael Joseph Dowgiallo, Doctor of Philosophy, 2004 Dissertation directed by: Professor Marjorie L. Reaka-Kudla Department of Biology, UMCP Species richness and abundance of benthic bivalve and gastropod molluscs was determined over a depth gradient of 5 - 244 m at Lee Stocking Island, Bahamas by deploying replicate benthic collectors at five sites at 5 m, 14 m, 46 m, 153 m, and 244 m for six months beginning in December 1993. A total of 773 individual molluscs comprising at least 72 taxa were retrieved from the collectors. Analysis of the molluscan fauna that colonized the collectors showed overwhelmingly higher abundance and diversity at the 5 m, 14 m, and 46 m sites as compared to the deeper sites at 153 m and 244 m. Irradiance, temperature, and habitat heterogeneity all declined with depth, coincident with declines in the abundance and diversity of the molluscs. Herbivorous modes of feeding predominated (52%) and carnivorous modes of feeding were common (44%) over the range of depths studied at Lee Stocking Island, but mode of feeding did not change significantly over depth. One bivalve and one gastropod species showed a significant decline in body size with increasing depth. Analysis of data for 960 species of gastropod molluscs from the Western Atlantic Gastropod Database of the Academy of Natural Sciences (ANS) that have ranges including the Bahamas showed a positive correlation between body size of species of gastropods and their geographic ranges. There was also a positive correlation between depth range and the size of the geographic range.
    [Show full text]
  • Marine Mollusca of Isotope Stages of the Last 2 Million Years in New Zealand
    See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/232863216 Marine Mollusca of isotope stages of the last 2 million years in New Zealand. Part 4. Gastropoda (Ptenoglossa, Neogastropoda, Heterobranchia) Article in Journal- Royal Society of New Zealand · March 2011 DOI: 10.1080/03036758.2011.548763 CITATIONS READS 19 690 1 author: Alan Beu GNS Science 167 PUBLICATIONS 3,645 CITATIONS SEE PROFILE Some of the authors of this publication are also working on these related projects: Integrating fossils and genetics of living molluscs View project Barnacle Limestones of the Southern Hemisphere View project All content following this page was uploaded by Alan Beu on 18 December 2015. The user has requested enhancement of the downloaded file. This article was downloaded by: [Beu, A. G.] On: 16 March 2011 Access details: Access Details: [subscription number 935027131] Publisher Taylor & Francis Informa Ltd Registered in England and Wales Registered Number: 1072954 Registered office: Mortimer House, 37- 41 Mortimer Street, London W1T 3JH, UK Journal of the Royal Society of New Zealand Publication details, including instructions for authors and subscription information: http://www.informaworld.com/smpp/title~content=t918982755 Marine Mollusca of isotope stages of the last 2 million years in New Zealand. Part 4. Gastropoda (Ptenoglossa, Neogastropoda, Heterobranchia) AG Beua a GNS Science, Lower Hutt, New Zealand Online publication date: 16 March 2011 To cite this Article Beu, AG(2011) 'Marine Mollusca of isotope stages of the last 2 million years in New Zealand. Part 4. Gastropoda (Ptenoglossa, Neogastropoda, Heterobranchia)', Journal of the Royal Society of New Zealand, 41: 1, 1 — 153 To link to this Article: DOI: 10.1080/03036758.2011.548763 URL: http://dx.doi.org/10.1080/03036758.2011.548763 PLEASE SCROLL DOWN FOR ARTICLE Full terms and conditions of use: http://www.informaworld.com/terms-and-conditions-of-access.pdf This article may be used for research, teaching and private study purposes.
    [Show full text]
  • CONE SHELLS - CONIDAE MNHN Koumac 2018
    Living Seashells of the Tropical Indo-Pacific Photographic guide with 1500+ species covered Andrey Ryanskiy INTRODUCTION, COPYRIGHT, ACKNOWLEDGMENTS INTRODUCTION Seashell or sea shells are the hard exoskeleton of mollusks such as snails, clams, chitons. For most people, acquaintance with mollusks began with empty shells. These shells often delight the eye with a variety of shapes and colors. Conchology studies the mollusk shells and this science dates back to the 17th century. However, modern science - malacology is the study of mollusks as whole organisms. Today more and more people are interacting with ocean - divers, snorkelers, beach goers - all of them often find in the seas not empty shells, but live mollusks - living shells, whose appearance is significantly different from museum specimens. This book serves as a tool for identifying such animals. The book covers the region from the Red Sea to Hawaii, Marshall Islands and Guam. Inside the book: • Photographs of 1500+ species, including one hundred cowries (Cypraeidae) and more than one hundred twenty allied cowries (Ovulidae) of the region; • Live photo of hundreds of species have never before appeared in field guides or popular books; • Convenient pictorial guide at the beginning and index at the end of the book ACKNOWLEDGMENTS The significant part of photographs in this book were made by Jeanette Johnson and Scott Johnson during the decades of diving and exploring the beautiful reefs of Indo-Pacific from Indonesia and Philippines to Hawaii and Solomons. They provided to readers not only the great photos but also in-depth knowledge of the fascinating world of living seashells. Sincere thanks to Philippe Bouchet, National Museum of Natural History (Paris), for inviting the author to participate in the La Planete Revisitee expedition program and permission to use some of the NMNH photos.
    [Show full text]
  • Imposex in Endemic Volutid from Northeast Brazil (Mollusca: Gastropoda)
    1065 Vol. 51, n. 5 : pp.1065-1069, September-October 2008 BRAZILIAN ARCHIVES OF ISSN 1516-8913 Printed in Brazil BIOLOGY AND TECHNOLOGY AN INTERNATIONAL JOURNAL Imposex in Endemic Volutid from Northeast Brazil (Mollusca: Gastropoda) Ítalo Braga de Castro 1*, Carlos Augusto Oliveira de Meirelles 2,3 , Helena Matthews- Cascon 2,3 ,. Cristina de Almeida Rocha-Barreira 2, Pablo Penchaszadeh 4 and Gregório Bigatti 5 1Laboratório de Microcontaminantes Orgânicos e Ecotoxicologia Aquática; Fundação Universidade Federal do Rio Grande; C. P.: 474; [email protected]; 96201-900; Rio Grande - RS -Brasil. 2Laboratório de Zoobentos; Instituto de Ciências do Mar; Fortaleza - Ceará - Brasil. 3Laboratório de Invertebrados Marinhos; Departamento de Biologia; Universidade Federal do Ceará; Fortaleza - CE - Brasil. 4Universidade de Buenos Aires; Buenos Aires - Argentina. 5Centro Nacional Patagónico, Puerto Madryn - Chubut - Argentina ABSTRACT Imposex is characterized by the development of masculine sexual organs in neogastropod females. Almost 120 mollusk species are known to present imposex when exposed to organic tin compounds as tributyltin (TBT) and triphenyltin (TPT). These compounds are used as biocide agents in antifouling paints to prevent the incrustations on boats. Five gastropod species are known to present imposex in Brazil: Stramonita haemastoma, Stramonita rustica, Leucozonia nassa, Cymathium parthenopeum and Olivancillaria vesica. This paper reports the first record of imposex observed in the endemic gastropod Voluta ebraea from Pacheco Beach, Northeast Brazil. Animals presenting imposex had regular female reproductive organs (capsule gland, oviduct and sperm-ingesting gland) and an abnormal penis. As imposex occurs in mollusks exposed to organotin compounds typically found at harbors, marinas, shipyards and areas with high shipping activities, probably contamination of Pacheco Beach is a consequence of a shipyard activity located in the nearest areas.
    [Show full text]
  • Auckland Shell Club Auction Lot List - 24 October 2015 Albany Hall
    Auckland Shell Club Auction Lot List - 24 October 2015 Albany Hall. Setup from 9am. Viewing from 10am. Auction starts at noon. Lot Type Reserve 1 WW Many SMALL CYPRAEIDAE including the rare Rosaria caputdraconis from Easter Is. Mauritian scurra from Somalia, Cypraea eburnea white from from, New Caledonia, Cypraea chinensis from Solomon Is Lyncina sulcidentata from Hawaii and heaps more. 2 WW Many CONIDAE including rare Conus queenslandis (not perfect!) Conus teramachii, beautiful Conus trigonis, Conus ammiralis, all from Australia, Conus aulicus, Conus circumcisus, Conus gubernator, Conus generalis, Conus bullatus, Conus distans, and many more. 3 WW BIVALVES: Many specials including Large Pearl Oyster Pinctada margaritifera, Chlamys sowerbyi, Glycymeris gigantea, Macrocallista nimbosa, Pecten glaber, Amusiium pleuronectes, Pecten pullium, Zygochlamys delicatula, and heaps more. 4 WW VOLUTIDAE: Rare Teramachia johnsoni, Rare Cymbiolacca thatcheri, Livonia roadnightae, Zidona dufresnei, Lyria kurodai, Cymbiola rutila, Cymbium olia, Pulchra woolacottae, Cymbiola pulchra peristicta, Athleta studeri, Amoria undulata, Cymbiola nivosa. 5 WW MIXTURE Rare Campanile symbolium, Livonia roadnightae, Chlamys australis, Distorsio anus, Bulluta bullata, Penion maximus, Matra incompta, Conus imperialis, Ancilla glabrata, Strombus aurisdianae, Fusinus brasiliensis, Columbarium harrisae, Mauritia mauritana, and heaps and heaps more! 6 WW CYPRAEIDAE: 12 stunning shells including Trona stercoraria, Cypraea cervus, Makuritia eglantrine f. grisouridens, Cypraea
    [Show full text]