DOCSLIB.ORG

New Occurrences of Modulidae (Mollusca: Gastropoda) from European Eocene, Oligocene and Miocene Deposits: Data from 19Th Century Collections

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
New Occurrences of Modulidae (Mollusca: Gastropoda) from European Eocene, Oligocene and Miocene Deposits: Data from 19Th Century Collections Carnets Geol. 20 (7) E-ISSN 1634-0744 DOI 10.4267/2042/70761 New occurrences of Modulidae (Mollusca: Gastropoda) from European Eocene, Oligocene and Miocene deposits: Data from 19th century collections Pierre LOZOUET 1 Bruno CAHUZAC 2 Laurent CHARLES 3 Abstract: A re-examination of the historical collections deposited at the Bordeaux Museum of Natural History and the Faculty of Sciences of the University of Bordeaux made it possible to identify new taxa of Modulidae in the Oligocene and Miocene of the Aquitaine Basin. These Modulidae belong to the Ame- rican groups Modulus modulus and Trochomodulus. In addition, three new species are described: Mo- dulus benoisti sp. nov. (Serravallian), Trochomodulus stampinicus sp. nov. (Rupelian), which is close to Trochomodulus sublaevigatus (ORBIGNY, 1852), a Chattian species, and Incisilabium trochiformis sp. nov. (Priabonian). The latter is the oldest known Modulidae, together with Incisilabium parisiensis (DE- SHAYES, 1832) (Middle Eocene) that was previously classified in the Trochidae. These results show that the paleobiogeography and origin of the family Modulidae need to be reconsidered. Key-words: • Aquitaine Basin; • Caenozoic; • paleobiogeography; • Gastropoda; • new species Citation: LOZOUET P., CAHUZAC B. & CHARLES L. (2020).- New occurrences of Modulidae (Mollusca: Gastropoda) from European Eocene, Oligocene and Miocene deposits: Data from 19th century collec- tions.- Carnets Geol., Madrid, vol. 20, no. 7, p. 125-139. Résumé : Nouvelles occurrences de Modulidae (Mollusca : Gastropoda) dans des gisements européens de l'Éocène, de l'Oligocène et du Miocène : Données de collections du 19e siècle.- L'examen de collections historiques déposées au Muséum d'Histoire Naturelle de Bordeaux et à la Fa- culté des Sciences de l'Université de Bordeaux a permis d'identifier de nouveaux taxons de Modulidae dans l'Oligocène et le Miocène du bassin aquitain. Ces Modulidae appartiennent aux groupes améri- cains Modulus modulus et Trochomodulus. Trois nouvelles espèces sont décrites : Modulus benoisti nov. sp. (Serravallien), Trochomodulus stampinicus nov. sp. (Rupélien), proche de Trochomodulus sublaevigatus (ORBIGNY, 1852), une espèce chattienne, et Incisilabium trochiformis nov. sp. (Priabo- nien). Ce dernier est le plus ancien Modulidae connu avec Incisilabium parisiensis (DESHAYES, 1832) (Éocène moyen) précédemmentDRAFT classé dans les Trochidae. Ces résultats montrent que la paléobiogéo- graphie et l'origine de la famille des Modulidae doivent être réexaminées. Mots-clefs : • Bassin d'Aquitaine ; • Cénozoïque ; • paléobiogéographie ; • Gastropoda ; • nouvelles espèces 1 Muséum national d'Histoire naturelle, Direction des Collections, CP 51, 55 rue de Buffon, 75231 Paris Cedex 05 (France) [email protected] 2 Université de Bordeaux, 351 Cours de la Libération, F - 33405 Talence Cedex (France) [email protected] 3 Muséum de Bordeaux - sciences et nature, 5 Place Bardineau, F - 33000 Bordeaux (France) [email protected] Published online in final form (pdf) on March 17, 2020 [Editor: Bruno GRANIER; language editor: Simon MITCHELL] 125 Carnets Geol. 20 (7) 1. Introduction This paper reports the rediscovery of Moduli- dae in the Oligocene and Miocene of the Aquitai- The Modulidae is a littoral cerithioid family ne Basin, belonging to genera that were pre- which occurs throughout the tropical and subtro- viously thought to be exclusively Caribbean (Mo- pical regions. It is relatively rare in fossil depo- dulus and Trochomodulus), in three historical col- sits. It is also a paucispecific family with about lections (MHNBx: coll. BENOIST; UB: general col- 12-16 living species. The tropical American re- lection and coll. GRATELOUP). It also describe a new gions are relatively rich with at least eleven living species of Incisilabium from the Upper Eocene. species, whereas there are two or three species Abbreviations used: Length, SL; Last whorl in the eastern Pacific and nine or more species in Length, SWL; Diameter, SD (Shell measure- the western Atlantic, and an equivalent number ments); MNHN-IM, Muséum national d'Histoire or more of fossil species (LANDAU et al., 2014). In naturelle (French National Museum of Natural comparison, only two species are recognised in History), Malacology; MNHN.F, Muséum national the vast West Indo-Pacific region (LOZOUET & KRY- d'Histoire naturelle, Paleontology; MHNBx, Mu- GELMANS, 2016; BOUCHET, 2018), and only one séum d'Histoire naturelle de Bordeaux (Bordeaux species is known from European Miocene depo- Museum of Natural History); UB, Université de sits. Bordeaux (University of Bordeaux), no. TYFIPAL ["TYpes et FIgurés en PALéontologie" (TYpe and FIgured specimens in PALeontology)]. DRAFT Figure 1: Location map of the Miocene of Saucats area, exposed between La Brède (downstream) and Saucats (upstream) villages. Succession of the stratotypic outcrops of the Aquitanian: 1 to 4; Burdigalian: 5 to 7; Serravallian : 8 (Lassime section). 126 Carnets Geol. 20 (7) 2. Geological framework and cate the richness of Lassime's fauna or are un- trustworthy. According to BENOIST, the fauna of BENOIST's historical collections Lassime is original, distinct from that of the equi- Along the "St-Jean-d'Étampes" stream (Giron- valent levels known in Aquitaine (the so-called de, Saucats and La Brède), geological strata from "Sallomacian" of Gironde [at Salles]; the "Helve- the Lower to Middle Miocene are exposed (Fig. tian" of Pyrénées-Atlantiques [at Orthez]). This 1). These include the classic outcrops of the Aqui- raises many questions. One of them concerns BE- tanian stratotype and outcrops of the Burdigalian NOIST's citation (1874: p. 287) of the occurrence stratotype. This territory is partially protected of the Recent species "Modulus lenticularis (= and constitutes since 1982 the "Réserve Naturelle Modulus modulus)" represented by two speci- Géologique de Saucats-La Brède" (Natural Geolo- mens in his collection (our Pl. 1, figs. 1-8). No gical Reserve of Saucats-La Brède, RNG), which other specimen of Modulus was known from the was the first geological Reserve created in Fran- Serravallian of the Aquitaine Basin and the Modu- ce. Most of the exposed strata belong to the lus modulus species-group was considered to be Lower Miocene (Aquitanian and Burdigalian) but a exclusively American. However, the specimens in limited part of the section, at the site named "La BENOIST's collection from "Lassime" are really very Sime, Cazenave" (now called Lassime), contains close to the Modulus modulus of the Caribbean layers belonging to the marine Middle Miocene (see Pl. 1, figs. 9-12). Because BENOIST has also (Serravallian) (MAYER, 1858; LINDER, 1872). The acquired a certain (perhaps unjustified) reputa- Serravallian deposits overlie the uppermost levels tion as a forger, at least in the domain of Ar- of the local Burdigalian (Fig. 2). This section chaeology (GENDRY, 2015), the first author (P. LO- shows therefore that a regional stratigraphical ZOUET) had a long-standing hesitation before con- gap exists corresponding to a hiatus including the sidering that these Modulus really came from the Upper Burdigalian, the Langhian and the Lower Serravallian of Aquitaine. Serravallian stages (LONDEIX & JAN DU CHÊNE, Today, consultation of another historical col- 1998; PARIZE et al., 2008). lection from Lassime (made in the 19th century) The macrofauna from this deposit, and in par- preserved at the University of Bordeaux (UB) fi- ticular the malacofauna, was listed long ago by nally clears all ambiguity because among the few BENOIST (1873, 1874) who identified 230 species. lots of preserved molluscs, there is a specimen of BENOIST (1845-1904), a dentist by profession, is Modulus identical to those from the BENOIST col- one of the main contributors to current knowled- lection. Therefore, we confirm that the Modulus ge of fossil molluscs from the Saucats Valley. His modulus species-group is really present in the collection was donated to, and has been partly pre- Middle Miocene of Aquitaine. Although we cannot served in, the Muséum de Bordeaux since 1900. affirm that BENOIST's lists are correct, this find Excavation of a new outcrop at the Lassime si- leads credence to the fact that some of the re- te (on the right bank DRAFTof the stream) was carried cords are correct. Moreover, the molluscs in the out by the RNG. In the Serravallian stage, three UB collection show some embedded dark grey units have been distinguished. The Middle Mioce- sandy marl sediment, comparable to LINDER's ne sequence begins with a transgressive conglo- (1872: p. 472) description of an outcrop on the merate containing calcareous pebbles. Dating left bank of the river (below Cazenave farm, up- using strontium isotopes on Glycymeris shells (Bi- stream from Lassime) which supplied numerous valvia) provided an age of 12.9 ± 0.7 Ma for this small gastropods. In this outcrop the molluscs basal layer (Fig. 2, level B, CAHUZAC et al., 1997). were clearly better preserved than those in the Using non-reworked glauconite grains from the classic section currently still visible on the right top of the outcrop, the K-Ar method gave an esti- bank of the river. mated age of 11.6 ± 0.2 Ma (Fig. 1, level D). Un- 3. Modulidae fortunately, the molluscs are poorly preserved in this outcrop, except for very thick shells and lar- in the GRATELOUP collection ge bivalves with a calcitic shell (Pectinidae). Ne- From 1827 to 1847, the physician Jean-Pierre vertheless, the collections have allowed us to Sylvestre GRATELOUP (1782-1861)
Load more

Recommended publications
  • (Gastropoda: Batillariidae) from Elkhorn Slough, California, USA
    Mitochondrial DNA Part B Resources ISSN: (Print) 2380-2359 (Online) Journal homepage: https://www.tandfonline.com/loi/tmdn20 The complete mitogenome of the invasive Japanese mud snail Batillaria attramentaria (Gastropoda: Batillariidae) from Elkhorn Slough, California, USA Hartnell College Genomics Group, Paulina Andrade, Lisbeth Arreola, Melissa Belnas, Estefania Bland, Araceli Castillo, Omar Cisneros, Valentin Contreras, Celeste Diaz, Kevin T. Do, Carlos Donate, Estevan Espinoza, Nathan Frater, Garry G. Gabriel, Eric A. Gomez, Gino F. Gonzalez, Myrka Gonzalez, Paola Guido, Dylan Guidotti, Mishell Guzman Espinoza, Ivan Haro, Javier Hernandez Lopez, Caden E. Hernandez, Karina Hernandez, Jazmin A. Hernandez-Salazar, Jeffery R. Hughey, Héctor Jácome-Sáenz, Luis A. Jimenez, Eli R. Kallison, Mylisa S. King, Luis J. Lazaro, Feifei Zhai Lorenzo, Isaac Madrigal, Savannah Madruga, Adrian J. Maldonado, Alexander M. Medina, Marcela Mendez-Molina, Ali Mendez, David Murillo Martinez, David Orozco, Juan Orozco, Ulises Ortiz, Jennifer M. Pantoja, Alejandra N. Ponce, Angel R. Ramirez, Israel Rangel, Eliza Rojas, Adriana Roque, Beatriz Rosas, Colt Rubbo, Justin A. Saldana, Elian Sanchez, Alicia Steinhardt, Maria O. Taveras Dina, Judith Torres, Silvestre Valdez-Mata, Valeria Vargas, Paola Vazquez, Michelle M. Vazquez, Irene Vidales, Frances L. Wong, Christian S. Zagal, Santiago Zamora & Jesus Zepeda Amador To cite this article: Hartnell College Genomics Group, Paulina Andrade, Lisbeth Arreola, Melissa Belnas, Estefania Bland, Araceli Castillo, Omar Cisneros, Valentin Contreras, Celeste Diaz, Kevin T. Do, Carlos Donate, Estevan Espinoza, Nathan Frater, Garry G. Gabriel, Eric A. Gomez, Gino F. Gonzalez, Myrka Gonzalez, Paola Guido, Dylan Guidotti, Mishell Guzman Espinoza, Ivan Haro, Javier Hernandez Lopez, Caden E. Hernandez, Karina Hernandez, Jazmin A.
    [Show full text]
  • Revised January 19, 2018 Updated June 19, 2018
    BIOLOGICAL EVALUATION / BIOLOGICAL ASSESSMENT FOR TERRESTRIAL AND AQUATIC WILDLIFE YUBA PROJECT YUBA RIVER RANGER DISTRICT TAHOE NATIONAL FOREST REVISED JANUARY 19, 2018 UPDATED JUNE 19, 2018 PREPARED BY: MARILYN TIERNEY DISTRICT WILDLIFE BIOLOGIST 1 TABLE OF CONTENTS I. EXECUTIVE SUMMARY ........................................................................................................... 3 II. INTRODUCTION.......................................................................................................................... 4 III. CONSULTATION TO DATE ...................................................................................................... 4 IV. CURRENT MANAGEMENT DIRECTION ............................................................................... 5 V. DESCRIPTION OF THE PROPOSED PROJECT AND ALTERNATIVES ......................... 6 VI. EXISTING ENVIRONMENT, EFFECTS OF THE PROPOSED ACTION AND ALTERNATIVES, AND DETERMINATION ......................................................................... 41 SPECIES-SPECIFIC ANALYSIS AND DETERMINATION ........................................................... 54 TERRESTRIAL SPECIES ........................................................................................................................ 55 WESTERN BUMBLE BEE ............................................................................................................. 55 BALD EAGLE ...............................................................................................................................
    [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]
  • TESE Elkênita Guedes Silva.Pdf
    UNIVERSIDADE FEDERAL DE PERNAMBUCO CENTRO DE TECNOLOGIA E GEOCIÊNCIAS DEPARTAMENTO DE OCEANOGRAFIA PROGRAMA DE PÓS-GRADUAÇÃO EM OCEANOGRAFIA ELKÊNITA GUEDES SILVA PADRÕES DE DIVERSIDADE E DISTRIBUIÇÃO ESPACIAL DA MACROFAUNA BENTÔNICA E BIOCLASTO DA PLATAFORMA CONTINENTAL DO LITORAL SUL DE PERNAMBUCO, BRASIL Recife 2018 ELKÊNITA GUEDES SILVA PADRÕES DE DIVERSIDADE E DISTRIBUIÇÃO ESPACIAL DA MACROFAUNA BENTÔNICA E BIOCLASTO DA PLATAFORMA CONTINENTAL DO LITORAL SUL DE PERNAMBUCO, BRASIL Tese apresentada ao Programa de Pós-graduação em Oceanografia (PPGO) da Universidade Federal de Pernambuco, como um dos requisitos para obtenção do grau de Doutora em Oceanografia. Área de Concentração: Oceanografia Biológica. Orientador: Prof. Dr. Jesser Fidelis de Souza Filho Recife 2018 Catalogação na fonte Bibliotecária Valdicea Alves, CRB-4 / 1260 S586p Silva, Elkênita Guedes. Padrões de diversidade e distribuição espacial da macrofauna bentônica e bioclasto da plataforma continental do litoral sul de Pernambuco, Brasil / Elkênita Guedes Silva. - 2018. 211 folhas, il., e tabs. Orientador: Prof. Dr. Jesser Fidelis de Souza Filho. Tese (Doutorado) – Universidade Federal de Pernambuco. CTG. Programa de Pós-Graduação em Oceanografia, 2018. Inclui Referências Anexo e Apêndices. 1. Oceanografia. 2. Biodiversidade. 3. Tamandaré. 4. Fauna bentônica. 5. Área de proteção marinha. I. Souza Filho, Jesser Fidelis de. (Orientador). II. Título. UFPE 551.46 CDD (22. ed.) BCTG/2018-455 ELKÊNITA GUEDES SILVA PADRÕES DE DIVERSIDADE E DISTRIBUIÇÃO ESPACIAL DA MACROFAUNA BENTÔNICA E BIOCLASTO DA PLATAFORMA CONTINENTAL DO LITORAL SUL DE PERNAMBUCO, BRASIL Tese apresentada ao Programa de Pós-graduação em Oceanografia (PPGO) da Universidade Federal de Pernambuco, como um dos requisitos para obtenção do grau de Doutora em Oceanografia Aprovada em 10/08 /2018 BANCA EXAMINADORA _________________________________________________________ Prof°.
    [Show full text]
  • Molecular Phylogenetic Relationship of Thiaridean Genus Tarebia Lineate
    Journal of Entomology and Zoology Studies 2017; 5(3): 1489-1492 E-ISSN: 2320-7078 P-ISSN: 2349-6800 Molecular phylogenetic relationship of Thiaridean JEZS 2017; 5(3): 1489-1492 © 2017 JEZS genus Tarebia lineate (Gastropoda: Cerithioidea) Received: 23-03-2017 Accepted: 24-04-2017 as determined by partial COI sequences Chittaranjan Jena Department of Biotechnology, Vignan’s University (VFSTRU), Chittaranjan Jena and Krupanidhi Srirama Vadlamudi, Andhra Pradesh, India Abstract An attempt was made to investigate phylogenetic affinities of the genus Tarebia lineata sampled from Krupanidhi Srirama the Indian subcontinent using partial mitochondrial COI gene sequence. The amplified partial mt-COI Department of Biotechnology, gene sequence using universal primers, LCO1490 and HCO2198 resulted into ~700 base pair DNA Vignan’s University (VFSTRU), Vadlamudi, Andhra Pradesh, fragment. The obtained nucleotide sequence of partial COI gene of T. lineata was submitted to BLAST India analysis and 36 close relative sequences of the chosen genera, Cerithioidea were derived. Maximum likelihood (ML) algorithm in-biuilt in RAxML software tool was used to estimate phylogenetic their affinities. The present analysis revealed that a single assemblage of the family Thiaridae supported by a bootstrap value of 96% is earmarked at the base of the derived cladogram as a cluster and emerged as a sister group with another four Cerithioideans. Our dataset brought add-on value to the current taxonomy of Thiaridae of the clade Sorbeconcha by clustering them as sister and non-sister groups indicating the virtual relations. Out of seven genera, Tarebia and Melanoides formed as primary and secondary clusters within the Thiaridae. The monophyly of Thiaridae and its conspecifics were depicted in the cladogram.
    [Show full text]
  • 8. the Mollusk Fauna of the Monte Postale
    Rendiconti della Società Paleontologica Italiana, 4, 2014, pp. 89-94 Excursion guidebook CBEP 2014-EPPC 2014-EAVP 2014-Taphos 2014 Conferences The Bolca Fossil-Lagerstätten: A window into the Eocene World (editors C.A. Papazzoni, L. Giusberti, G. Carnevale, G. Roghi, D. Bassi & R. Zorzin) 8. The mollusk fauna of the Monte Postale Stefano DOMINICI S. Dominici, Museo di Storia Naturale, Università di Firenze, Via La Pira 4, I-50121 Firenze, Italy; !$`"$ Fossil marine mollusks from Monte Postale, about one mile NE of Bolca (Verona and Vicenza Provinces) and 300 m N of the “Pesciara” (see the map in Papazzoni & Trevisani, 2006), were collected and catalogued at least since the 18th`[ seen, in the second decade of the 19th century, as means to date the rocks, and the already O"~P`[` geologists. In 1823, on the footsteps of Alberto Fortis (1778), Alexandre Brongniart drew stratigraphic sections and collected fossils in the Vicenza province, assigning the Bolca and Roncà invertebrates to one and the same geological interval. In the newly introduced 5~`[` Paris Basin. This meant to Brongniart that they belonged to the older Tertiary, and were distinct from the fossil shells described by Giambattista Brocchi in 1814, typifying the younger Tertiary (Rudwick, 2005). “I can relate the calcareous-trappic terrains of Northern Italy to the lower formation, the most ancient of the upper sediment [i.e., the Tertiary]. I’m struck by the analogy between these two terrains, their utter similarity under almost any aspect. Nothing of the lower terrains of the Parisian limestone is missing in Bolca, Roncà, etc.
    [Show full text]
  • Gastropod Fauna of the Cameroonian Coasts
    Helgol Mar Res (1999) 53:129–140 © Springer-Verlag and AWI 1999 ORIGINAL ARTICLE Klaus Bandel · Thorsten Kowalke Gastropod fauna of the Cameroonian coasts Received: 15 January 1999 / Accepted: 26 July 1999 Abstract Eighteen species of gastropods were encoun- flats become exposed. During high tide, most of the tered living near and within the large coastal swamps, mangrove is flooded up to the point where the influence mangrove forests, intertidal flats and the rocky shore of of salty water ends, and the flora is that of a freshwater the Cameroonian coast of the Atlantic Ocean. These re- regime. present members of the subclasses Neritimorpha, With the influence of brackish water, the number of Caenogastropoda, and Heterostropha. Within the Neriti- individuals of gastropod fauna increases as well as the morpha, representatives of the genera Nerita, Neritina, number of species, and changes in composition occur. and Neritilia could be distinguished by their radula Upstream of Douala harbour and on the flats that lead anatomy and ecology. Within the Caenogastropoda, rep- to the mangrove forest next to Douala airport the beach resentatives of the families Potamididae with Tympano- is covered with much driftwood and rubbish that lies on tonos and Planaxidae with Angiola are characterized by the landward side of the mangrove forest. Here, Me- their early ontogeny and ecology. The Pachymelaniidae lampus liberianus and Neritina rubricata are found as are recognized as an independent group and are intro- well as the Pachymelania fusca variety with granulated duced as a new family within the Cerithioidea. Littorini- sculpture that closely resembles Melanoides tubercu- morpha with Littorina, Assiminea and Potamopyrgus lata in shell shape.
    [Show full text]
  • Constructional Morphology of Cerithiform Gastropods
    Paleontological Research, vol. 10, no. 3, pp. 233–259, September 30, 2006 6 by the Palaeontological Society of Japan Constructional morphology of cerithiform gastropods JENNY SA¨ LGEBACK1 AND ENRICO SAVAZZI2 1Department of Earth Sciences, Uppsala University, Norbyva¨gen 22, 75236 Uppsala, Sweden 2Department of Palaeozoology, Swedish Museum of Natural History, Box 50007, 10405 Stockholm, Sweden. Present address: The Kyoto University Museum, Yoshida Honmachi, Sakyo-ku, Kyoto 606-8501, Japan (email: [email protected]) Received December 19, 2005; Revised manuscript accepted May 26, 2006 Abstract. Cerithiform gastropods possess high-spired shells with small apertures, anterior canals or si- nuses, and usually one or more spiral rows of tubercles, spines or nodes. This shell morphology occurs mostly within the superfamily Cerithioidea. Several morphologic characters of cerithiform shells are adap- tive within five broad functional areas: (1) defence from shell-peeling predators (external sculpture, pre- adult internal barriers, preadult varices, adult aperture) (2) burrowing and infaunal life (burrowing sculp- tures, bent and elongated inhalant adult siphon, plough-like adult outer lip, flattened dorsal region of last whorl), (3) clamping of the aperture onto a solid substrate (broad tangential adult aperture), (4) stabilisa- tion of the shell when epifaunal (broad adult outer lip and at least three types of swellings located on the left ventrolateral side of the last whorl in the adult stage), and (5) righting after accidental overturning (pro- jecting dorsal tubercles or varix on the last or penultimate whorl, in one instance accompanied by hollow ventral tubercles that are removed by abrasion against the substrate in the adult stage). Most of these char- acters are made feasible by determinate growth and a countdown ontogenetic programme.
    [Show full text]
  • Seasonal Reproductive Anatomy and Sperm Storage in Pleurocerid Gastropods (Cerithioidea: Pleuroceridae) Nathan V
    989 ARTICLE Seasonal reproductive anatomy and sperm storage in pleurocerid gastropods (Cerithioidea: Pleuroceridae) Nathan V. Whelan and Ellen E. Strong Abstract: Life histories, including anatomy and behavior, are a critically understudied component of gastropod biology, especially for imperiled freshwater species of Pleuroceridae. This aspect of their biology provides important insights into understanding how evolution has shaped optimal reproductive success and is critical for informing management and conser- vation strategies. One particularly understudied facet is seasonal variation in reproductive form and function. For example, some have hypothesized that females store sperm over winter or longer, but no study has explored seasonal variation in accessory reproductive anatomy. We examined the gross anatomy and fine structure of female accessory reproductive structures (pallial oviduct, ovipositor) of four species in two genera (round rocksnail, Leptoxis ampla (Anthony, 1855); smooth hornsnail, Pleurocera prasinata (Conrad, 1834); skirted hornsnail, Pleurocera pyrenella (Conrad, 1834); silty hornsnail, Pleurocera canaliculata (Say, 1821)). Histological analyses show that despite lacking a seminal receptacle, females of these species are capable of storing orientated sperm in their spermatophore bursa. Additionally, we found that they undergo conspicuous seasonal atrophy of the pallial oviduct outside the reproductive season, and there is no evidence that they overwinter sperm. The reallocation of resources primarily to somatic functions outside of the egg-laying season is likely an adaptation that increases survival chances during winter months. Key words: Pleuroceridae, Leptoxis, Pleurocera, freshwater gastropods, reproduction, sperm storage, anatomy. Résumé : Les cycles biologiques, y compris de l’anatomie et du comportement, constituent un élément gravement sous-étudié de la biologie des gastéropodes, particulièrement en ce qui concerne les espèces d’eau douce menacées de pleurocéridés.
    [Show full text]
  • Marine Ecology Progress Series 228:153
    MARINE ECOLOGY PROGRESS SERIES Vol. 228: 153–163, 2002 Published March 6 Mar Ecol Prog Ser Carnivore/non-carnivore ratios in northeastern Pacific marine gastropods James W. Valentine1,*, Kaustuv Roy2, David Jablonski3 1Department of Integrative Biology and Museum of Paleontology, University of California, Berkeley, California 94720, USA 2Ecology, Behavior and Evolution Section, Division of Biology, University of California at San Diego, 9500 Gilman Drive, La Jolla, California 92093-0116, USA 3Department of Geophysical Sciences, University of Chicago, 5734 Ellis Avenue, Chicago, Illinois 60637, USA ABSTRACT: For 2321 species of shelled gastropods of the northeastern Pacific, the ratio of carnivo- rous to non-carnivorous species (C/NC ratio), computed for each degree of latitude, reveals striking spatial changes, with tropical and arctic areas characterized by high values and with the mid- latitudes having the lowest ratios. This latitudinal trend is markedly different from trends for terres- trial clades. The zonal variation in C/NC ratios within bins is largely due to differences in geographic ranges of the groups; for example, tropical carnivorous species range farther than non-carnivorous ones, thus overlapping them in more latitudinal bins. Differences in the distribution and diversity of carnivorous and non-carnivorous species may arise from a number of sources, including variability of primary production in the tropical eastern Pacific, patchiness of substrates to which non-carnivores are adapted, narrow dietary specializations of tropical carnivores, and higher provinciality found in extratropical regions. KEY WORDS: Trophic ratios · Latitudinal diversity trends · Provinciality · Variable productivity Resale or republication not permitted without written consent of the publisher INTRODUCTION diversities (Faaborg 1985, Jeffries & Lawton 1985, Karr et al.
    [Show full text]
  • Caenogastropoda
    13 Caenogastropoda Winston F. Ponder, Donald J. Colgan, John M. Healy, Alexander Nützel, Luiz R. L. Simone, and Ellen E. Strong Caenogastropods comprise about 60% of living Many caenogastropods are well-known gastropod species and include a large number marine snails and include the Littorinidae (peri- of ecologically and commercially important winkles), Cypraeidae (cowries), Cerithiidae (creep- marine families. They have undergone an ers), Calyptraeidae (slipper limpets), Tonnidae extraordinary adaptive radiation, resulting in (tuns), Cassidae (helmet shells), Ranellidae (tri- considerable morphological, ecological, physi- tons), Strombidae (strombs), Naticidae (moon ological, and behavioral diversity. There is a snails), Muricidae (rock shells, oyster drills, etc.), wide array of often convergent shell morpholo- Volutidae (balers, etc.), Mitridae (miters), Buccin- gies (Figure 13.1), with the typically coiled shell idae (whelks), Terebridae (augers), and Conidae being tall-spired to globose or fl attened, with (cones). There are also well-known freshwater some uncoiled or limpet-like and others with families such as the Viviparidae, Thiaridae, and the shells reduced or, rarely, lost. There are Hydrobiidae and a few terrestrial groups, nota- also considerable modifi cations to the head- bly the Cyclophoroidea. foot and mantle through the group (Figure 13.2) Although there are no reliable estimates and major dietary specializations. It is our aim of named species, living caenogastropods are in this chapter to review the phylogeny of this one of the most diverse metazoan clades. Most group, with emphasis on the areas of expertise families are marine, and many (e.g., Strombidae, of the authors. Cypraeidae, Ovulidae, Cerithiopsidae, Triphori- The fi rst records of undisputed caenogastro- dae, Olividae, Mitridae, Costellariidae, Tereb- pods are from the middle and upper Paleozoic, ridae, Turridae, Conidae) have large numbers and there were signifi cant radiations during the of tropical taxa.
    [Show full text]
  • Five New Species of the Genus Semisulcospira
    Bulletin of the Mizunami Fossil Museum, no. 44 (2018), p. 59–67, 2 figs. © 2018, Mizunami Fossil Museum Five new species of the genus Semisulcospira (Mollusca: Caenogastropoda: Semisulcospiridae) from the Pleistocene Katata Formation of the Kobiwako Group, Shiga Prefecture, central Japan Keiji Matsuoka* and Osamu Miura** *Toyohashi Museum of Natural History, 1-238 Oana, Oiwa-cho, Toyohashi, Aichi 441-3147, Japan <[email protected]> **Faculty of Agriculture and Marine Science, Kochi University, 200 Monobe, Nankoku, Kochi 783-8502, Japan <[email protected]> Abstract Five new species of the freshwater snail genus Semisulcospira are described from the Pleistocene Katata Formation of the Kobiwako Group in central Japan. Semisulcospira contains two subgenera, Semisulcospira and Biwamelania, and these five new species belong to the subgenus Biwamelania. Semisulcospira (Biwamelania) nakamurai nov. sp., Semisulcospira (Biwamelania) pseudomultigranosa nov. sp., Semisulcospira (Biwamelania) spinulifera nov. sp., Semisulcospira (Biwamelania) kokubuensis nov. sp., and Semisulcospira (Biwamelania) pusilla nov. sp. are described herein. These species appear to be the direct ancestors of fifteen extant species of Biwamelania that have been diversified in Lake Biwa for the last approximately 400,000 years; then, these occurrences can provide valuable information to understand the history of diversification of Biwamelania species in Lake Biwa. Key words: Freshwater snail, Mollusca, Semisulcospiridae, Semisulcospira, Biwamelania, Kobiwako Group, Pleistocene, Lake Biwa, Japan Introduction Biwamelania (Watanabe and Nishino, 1995; Nishino and Watanabe, 2000). While the subgenus Biwamelania is The genus Semisulcospira Boettger, 1886 is widely currently endemic to Lake Biwa and its drainage, the fossil distributed and one of the most abundant molluscs in species of Biwamelania has a broader distribution range in freshwater environments of East Asia (Davis, 1969; Burch Tokai, Kinki, and Kyushu regions during the Pliocene and et al., 1987; Strong and Köhler, 2009).
    [Show full text]