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Les Mollusques Éocènes Se Dévoilent Sous Ultraviolets

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Les Mollusques Éocènes Se Dévoilent Sous Ultraviolets See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/259400606 Les mollusques éocènes se dévoilent sous ultraviolet. In : Les coquillages de l'Éocène du Bassin parisien, un trésor inestimable... Article · December 2012 CITATIONS READS 4 663 4 authors: Bruno Caze Didier Merle Muséum National d'Histoire Naturelle Muséum National d'Histoire Naturelle 19 PUBLICATIONS 69 CITATIONS 105 PUBLICATIONS 543 CITATIONS SEE PROFILE SEE PROFILE Jean-Paul Saint Martin Jean-Michel Pacaud Muséum National d'Histoire Naturelle Muséum National d'Histoire Naturelle 157 PUBLICATIONS 1,282 CITATIONS 134 PUBLICATIONS 529 CITATIONS SEE PROFILE SEE PROFILE All in-text references underlined in blue are linked to publications on ResearchGate, Available from: Didier Merle letting you access and read them immediately. Retrieved on: 20 November 2016 FHS3-01-Couv-Ext:FHS3-01-Couv-Ext 19/01/13 09:15 Page1 Revue française de paléontologie Ce que le temps nous a caché, aujourd’hui nous le découvrons ! Glycymeris dispar Sigmesalia multisulcata (DEFRANCE 1826) (LAMARCK 1804) Rimella fissurella Apiotoma pyrulata (LINNAEUS 1767) (DESHAYES 1834) Les coquillages de l’Eocène du Bassin parisien La carrière de Thiverval- Grignon (Yvelines), en 2008 Les coquillages de l’Eocène du Bassin parisien un trésor inestimable Campanile giganteum (LAMARCK 1804) vieux de plusieurs dizaines de millions d’années ISBN 978-2-917198-17-9 Revue française de paléontologie Gisortia (s.str.) coombii (SOWERBY in DIXON 1850) Ce que le temps nous a caché, aujourd’hui nous le découvrons ! Hors-série - 2012 Hors-série III - 2012 III - Hors-sé rie - ISSN 2108-2138 € 20 FHS3-02-Sommaire:FHS3-02-Sommaire 19/01/13 09:21 Page3 Fossiles - hors-série III - 2012 Les coquillages de l’Eocène du Bassin parisien Préface... Didier Merle 4 Géologie... L’Eocène du Bassin parisien Bruno Caze & Jean-Michel Pacaud 5 Organismes... Les bivalves et les gastéropodes Athleta (Volutospina) spinosus au sein du grand clade des mollusques (LINNAEUS 1758), au premier plan, et, derrière, Costacallista laevigata (LAMARCK Bruno Caze 10 1806), Lutétien de la région de Damery, Marne. H(Athleta) = 49 mm(coll. : Fossiles... P. Courville - photo : P. Lebrun). Les mollusques lutétiens Athleta (Neoathleta) citharoedus (HOLTEN 1802) [sous lumière UV], se dévoilent sous ultraviolet Lutétien de Thiverval-Grignon, Yvelines. B. Caze, D. Merle, J.-P. Saint Martin J.-M. Pacaud H = 86 mm (coll. : MNHN.F. A25029 - & 15 photo : P. Loubry/MNHN, Paris). Biotope... Revue trimestrielle Le Lutétien de Damery : géologie, environnements, par abonnement annuel associations de bivalves et gastéropodes éditée par les Editions du Piat P. Courville, J.-M. Pacaud, D. Merle & P. Lebrun 57 S.A.R.L au capital de 7 622 a - Siret : 398 785 980 00028 Glavenas - 43200 Saint-Julien-du-Pinet Histoire... Tél. & Fax : 04.71.66.54.67 Un Campanile giganteum pêché au large De l’étranger : (33) 471.66.54.67 e Adresse Internet : www.minerauxetfossiles.com de l’Australie : une supercherie du 19 siècle Courriel : [email protected] Jean-Michel Pacaud 72 Fondateur et directeur de la publication Louis-Dominique Bayle Géants... Courriel : [email protected] Gisortia (s.str.) coombii, une espèce Rédacteur en chef emblématique de l’Eocène du bassin de Paris Patrice Lebrun Courriel : [email protected] Jean-Michel Pacaud 82 Tél. : 01.48.43.88.02 Ailleurs... Responsable du serveur Internet Louis-Dominique Bayle L’Eocène hors du Bassin parisien Comité de lecture et conseillers scientifiques Bruno Caze & Jean-Michel Pacaud 86 Philippe Courville - Didier Bert - Sylvain Cédolin - Sylvain Charbonnier - Hervé Châtellier - François Escuillié - Christian Les mollusques des sables éocènes Falipou - Bertrand Lefebvre - Jean-Michel Pacaud Louis Rulleau - Bruno Vallois de Bois-Gouët (Loire-Atlantique) Dessinateur Patrice Lebrun, P. Courville & J.-M. Pacaud 92 Patrice Lebrun Visite... Photographes Patrice Lebrun - Louis-Dominique Bayle “La Cave aux Coquillages” Relecteurs Patrice Lebrun 98 Philippe Courville - Damien Gendry Postface... Adaptation des “abstracts” Didier Merle 105 Pierre Lacroix - Allart Van Viersen (NL) ” est imprimé sur un papier issu d’exploitations forestières adhérentes à la gestion durable de forêt Correspondants étrangers Raimund Albersdörfer, Schnaittach, Allemagne Bon de commande d’ouvrages 106 Fossiles Mark Wolvers, Mijdrecht, Pays-Bas “ Anton Brodsky, Russie La visite, l’exploration ou la découverte des lieux en activité ou abandonnés (carrières, Michael Wachtler, Italie - Pierre Abi Saad, Byblos, Liban mines, galeries, haldes...) décrits dans la revue ne peuvent en aucun cas s’effectuer sans l’accord préalable du propriétaire ou de l’exploitant. Photocomposition - Photogravure La revue décline toute responsabilité en cas de dégradations effectuées par ses lecteurs. P. Lebrun, L.-D. Bayle et Imprimerie Phil’Print Respectez le(s) site(s) et leur(s) propriétaire(s) et l’on vous respectera. Imprimeur Imprimerie Phil’Print - 43200 Yssingeaux Toute représentation ou reproduction intégrale ou partielle, faite sans le consen- tement de l’auteur ou de ses ayants droit ou ayants cause, est illicite (article Dépôt légal : décembre 2012 L.122-4 du code de la propriété intellectuelle). Toute copie doit avoir l’accord du I.S.S.N. : 2108-2138 - ISBN : 978-2-917198-17-9 Centre français de droit de copie (CFC) : 20, rue des Grands Augustins, 75006 Commission paritaire : 0417 T 90341 Paris. Tél. : 01.44.07.47.70 - Fax : 01.46.34.67.19. Prix de l’abonnement annuel : 4 numéros + 1 hors-série France : individuel : 40 a - association et soutien : 60 a Etranger : U.E. + Suisse : 50 a - Dom-Tom et autres pays : 60 a Prix de vente du numéro hors-série III - 2012 : 20 € Ce numéro hors-série III - 2012 a été tiré à 2 500 exemplaires. Rejoignez “Fossiles” sur Fossiles, hors-série Pour vous connecter, rechercher “Fossiles, revue française 3 III de paléontologie” puis cliquez sur le bouton “J’aime”. FHS3-05-Motifs:FHS3-05-Motifs 19/01/13 09:47 Page15 Les mollusques éocènes se dévoilent sous ultraviolets Bruno CAZE (1), Didier MERLE (1), Jean-Paul SAINT MARTIN (1) & Jean-Michel PACAUD (1) (1) Centre de Recherche sur la Paléobiodiversité et les Paléoenvironnements (CR2P), UMR 7207 du CNRS, Département Histoire de la Terre, Muséum national d’Histoire naturelle. 8, rue Buffon, CP 38, F-75005 Paris, France The Eocene molluscs revealed under ultraviolet light. - Abstract: In order to distinguish and characterise biological groups and species in fossil molluscs, palaeontologists have to rely on shell morphology. Several sets of characters used by neontologists to define the extant groups and species are indeed lacking for the study of fossils (e.g., the anatomy of the soft parts, molecular sequences, ecology, behaviour). This absence is an obstacle to understanding the structure of palaeobiodiversity and its evolution. In extant molluscs, the colour patterns of the shells also represents a useful set of characters, in addition to traditional conchyological characters, for their study. Many extant gastropods and bivalves indeed show very diverse patterns. They often constitute a decisive criterion for distinguishing and characterising biological groups and species. However in the fossils, this characters set is also missing. The record of fossil or residual colour patterns is an outstanding and rare phenomenon because of the fast pigment degradation after the death of the animal and during fossilisation. Only a few remarkably well-preserved specimens display remnants of colour pattern. Their occurrence was considered as exceptional and so far it was regarded more as anecdotal data than as a heuristic scientific fact. Therefore, they have scarcely been regarded as a tool for distinguishing and characterising species and groups in palaeontology. However, in 1967 Olsson demonstrated that residual colour patterns could be revealed on some Caenozoic shells exposed to ultraviolet (UV) light. Till now, this kind of preservation was nevertheless also considered as anecdotic. In the present paper, we describe the results of a study based on a methodology implemented and formalized by Pacaud and Merle (MNHN, Paris) and performed on more than 400 species of Eocene gastropods and bivalves (more than 70 families). Residual colour patterns were revealed by an exposure to UV light after a suitable non-destructive chemical treatment (bath of sodium hypochlorite). More than 10,000 specimens, from the four Eocene stages and from various fossiliferous sites in the Paris Basin were tested. The first major result of this work is that the missing colour patterns can be reliably revealed in many species (more than 300 species yielding positive results) and that they are very diversified and common on the individuals of a species bearing them, thus providing the access to the study of the variation. It clearly demonstrates that the preservation of residual patterns is not unusual in the Eocene geological record. In a second step, we used this new set of morphological characters for fossil molluscs in the frame of the systematic study of two gastropod families. The first description of the residual colour patterns allowed to analyse the intraspecific variations in the Seraphsidae and the interspecific variations of Ampullinidae. These complementary studies indicated that the residual patterns have a biological and evolutionary signal and emphasized the high potential of Caenozoic molluscan shells to exploit them in Systematics (contribution to the distinction and characterisation
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