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Contr. Tert. Geol. 7 fig'., 4 tab., 3 pis. Leiden, September 1990 Quatern. 27(2-3) 3981 A Late Oligocene (Chattian B) molluscan fauna from the coastal cliff at Mogenstrup, North of Skive, Jutland, Denmark K.I. Schnetler LANGA, DENMARK and C. Beyer STAVANGER, NORWAY Schnetler, K.I., & C. Beyer. A Late Oligocene (Chattian B) molluscan fauna from the coastal cliff at Mogenstrup, North of Skive, Jutland, Denmark. — Contr. Tert. Quatern. Geol., 27(2-3): 39-82, 7 figs, 3 tabs, 3 pis. Leiden, September 1990. rich Late molluscan fauna from coastal cliff North of Skive, was studied. A very Oligocene a at Mogenstrup, Jutland, Denmark, A of the Late in NW is the and the section are des- summary Palaeogene sedimentary sequence Jutland given, locality exposed cribed. Lithostratigraphical, magnetostratigraphical and biostratigraphical correlations are suggested. A list of the molluscan species is given, comparisons with other Danish and German Late Oligocene localities are made, and palaeoecological interpreta- the Andersondrillia is introduced within the Microdrillia. tions are suggested. In the systematic part subgenus subgen. nov. genus Several taxa are discussed and the followingnew species and subspecies are described: Limopsis (Pectunculina) lamellata chattica subsp. vonderhochti Collonia troelsi nov., Limopsis (Pectunculina) sp. nov., (Collonia) sp. nov., Lepetella helgae sp. nov., Lepetellajytteae sp. nov., Laiocochlis Tubiola subangulata sp. nov., Cerithiopsis (s. lat.) antonjansei sp. nov., (Laiocochlis) supraoligocaenica sp. nov., Triforis (Trituba) Cirsotrema Searlesia ravni brueckneri danica Clavatula sorgenfreii sp. nov., (Opaliopsis) subglabrum sp. nov., sp. nov., Angistoma subsp. nov., Microdrillia Pleurotomella mogenstrupensis sp. nov., Microdrillia (Microdrillia) ingerae sp. nov., (Andersondrillia) brejningensis sp. nov., rasmusseni and ? nov. (Pleurotomella) sp. nov., Rimosodaphnella lappanni sp. nov. Actaeopyramis (s. lat.) pseudopunctata sp. Key-words — Mollusca, Late Oligocene, Chattian B, new taxa, lithostratigraphy, magnetostratigraphy, biostratigraphy, palaeoecology, Denmark. K.I. Schnetler, Fuglebakken 14, Stevnstrup, DK-8870 Langa, Denmark; C. Beyer, CB-Magneto, P.O. Box 7015, Jorenholmen, N-4004 Stavanger, Norway. Contents Material 45 Dansk sammendrag p. 40 p. Introduction 41 List of molluscan 46 p. species p. The 50 Late Oligocene sedimentary sequence Systematic part p. other in NW Jutland p. 41 Comparison with Late Oligocene mol- luscan faunas 71 Lithostratigraphical correlation p. 44 p. correlation 44 73 Magnetostratigraphical p. Palaeoecological interpretations p. The Mogenstrup section p. 44 Acknowledgements p. 75 References 75 Biostratigraphical correlation p. 45 p. 1 This study was supported by the Danish National Science Research Council through grant 91-3204 40 1 Location of the section. Part of the 12/6 III SV Kort- Fig. Mogenstrup 1:25,000 map-sheet Hvalpsund (C). og Matrikelstyrelsen (A84-90). (Author: Schnetler). Dansk sammendrag En 0vre fra B Oligocaen molluskfauna Mogenstrup, cerer en Chattian alder. Faunalisten indeholder nord for Danmark. Fra den diskuteres Skive, Jylland, en kyst- 197 arter. I systematiske del en klint nord for Skive 0vre raekke afbildes raekke er en meget rig Oligo- arter, og pa tre plancher en caen molluskfauna indsamlet. Denne fauna er karakteristiske arter. Inden for slaegten Microdrillia raek- bemaerkelsesvaerdig ved at indeholde en lang opstilles den nye underslsegt Andersondrillia. ke der fundet i danske af- introduceres: Li- arter, aldrig tidligere er Folgende nye arter og underarter fra denne del lamellata chattica lejringer periode, ligesom en arter, mopsis (Pectunculina) subsp. no v., der er andre her er vonderhochti Collonia yderst sjaeldne pa lokaliteter, Limopsis (Pectunculina) sp. nov., I det beskrives loka- troelsi hyppige. foreliggende arbejde (Collonia) sp. nov., Lepetella helgae sp. nov., 0vre Oli- liteten, og der gives en oversigt over den Lepetella jytteae sp. nov., Tubiola subangulata sp. i NV gocaene lagserie Jylland. Litho-, magneto- og nov., Cerithiopsis (s. lat.) antonjansei sp. nov., Laio- korrelationer tolk- cochlis biostratigrafiske foreslas, og en (Laiocochlis) supraoligocaenica sp. nov., Triforis af Pectiniderne indi- Cirsotrema ning aflejringsmiljoet gives. (Trituba) sorgenfreii sp. nov., (Opaliopsis) 41 Searlesia ravni does show affinities with subglabra sp. nov., sp. nov., Angistoma unpublished assemblages brueckneri danica subsp. nov., Clavatula mogenstrupen- from the Vejle Fjord area, especially with regard Microdrillia number of characteristic The sis sp. nov., (Microdrillia) ingerae sp. to a species. assem- Microdrillia also shows affinities with the rich fauna nov., (Andersondrillia) brejningensis sp. blage very Pleurotomella from F.R.G. nov., (Pleurotomella) rasmusseni sp. Glimmerode, (R. Janssen, 1978a, b; nov., Rimosodaphnella lappanni sp. nov. og ? Actaeo- 1979a, b). Faunasam- pyramis (s. lat.) pseudopunctata sp. nov. THE LATE OLIGOCENE SEDIMENTARY SEQUENCE IN mensaetningen indicerer aflejring pa lavere vand NW JUTLAND (AUTHOR: BEYER) end de ovrige kendte danske 0vre Oligocaene for raekke The Late in NW faunaer. Faunaen viser, isaer en Oligocene sedimentary sequence sjaeldnere arters vedkommende, affinitet til fau- Jutland consists of the fine-grained Branden For- faunaen fra mation naer fra Vejle Fjord omradet og til underlying a coarser grained sequence, which several localities in the Glimmerode, Vesttyskland. Ud fra en palaso- outcrops at area. foreslas sublittoralt These sediments okologisk tolkning et aflej- coarser (Fig. 2a) comprise an of ringsmiljo. up to c. 120 m thick sequence shallow-marine sands of deposits, overlain by Miocene quartz Schnetler Introduction (Authors: and Beyer) fluvial The Late be origin. Oligocene part may The Mogenstrup section is located in NW divided into six facies types (indicated by letters F the of to from to Jutland, Denmark, on east coast Sailing, ap- A, top bottom): proximately 1 km South of the small village of Mogenstrup (UTM coordinates: NH 074 814, F - Seven metres of alternating mud, silt and A sand in storm-dominated tidal-flat Fig. 1). locality near Hakkildgârd, approx- deposited a imately 1 km North of the Mogenstrup section, environment. In E - in was already mentioned by Ravn (1906, 1907). Well-sorted, fine-grained sand, deposited his extensive work on the molluscan faunas from near-shore, beach and back-barrier en- the Oligocene and Miocene Formations that vironments. The thickness is up to 20 m. D - and author considered the sediments to be of Middle Lagoonal protected bay deposits con- this of Miocene age, but later (Ravn, 1924) age sisting black, homogeneous, organic mud with horizons of calcite concretions. assignment was questioned. Subsequently, spherical stratigraphie work was done in other localities in The thickness of this facies varies from a a few 60 the area (e.g. Sorgenfrei, 1940; Rasmussen, 1961; metres to about m. and - and of Kristoffersen, 1972; Lieberkind, 1977), a C Shallow-bay shelf sediments consisting Late Miocene for chamositic close to a Oligocene or Early age com- mud, probably deposited parable sediments suggested. Since the publication river mouth. This facies is found only in the of Ravn's the at western of the where it papers, however, outcrops part area (Fig. 5) had studied in reaches thickness of 8 Mogenstrup not been until 1987, a m. which included in facies B - Shelfsediments of silt year they were a analysis consisting a glauconitic with of siderite concretions in the of the Late Oligocene sedimentary sequence in layers up- That included The thickness varies from less NW Jutland (Beyer, 1987). paper a permost metre. the results of which 1 8 palaeomagnetic study, suggest than m to m. Chattian for this A - Laminated silt, rich in diatoms, in a Late age sequence. deposited of During field work along the coast North an anoxic environment, possibly an upwelling Skive thin sand discovered The thickness is less than a glauconitic layer was zone. one metre. in the coastal cliff at Mogenstrup. This sand was rich in molluscs and The at least three very fossils, especially spines sequence comprises major of the echinoid ‘Cidaris’ The is hiatuses indicated in 2a. At least sp. present paper as Fig. two trans- the result of of the rnolluscan which occurred a study fauna, gressions during the time of deposition. found 197 89 of which the first material was to comprise taxa, are During one, mainly fine-grained for the recorded from the Danish Late Oligocene was deposited (facies A and B). After a regression first time. minor occurred. This a transgression transgres- The molluscan is different sion the introduction of material into assemblage distinctly saw coarser from all known Danish Late but the to the establishment of barrier- Oligocene faunas, area, leading a 42 1 Fig. (see (author: Mogenstrup legend) for at 2b sequence Fig. and Sedimentary location for Beyer). 3. Fig. to and 2a (author: Legend Figs Schnetler). 4 2b. Fig. the the (author: in Jutland. illustrating variable values NW column in highly maximum are sequence with lithological which shown Oligocene are Composite Late Thicknesses area, Beyer). 2a. Fig. 43 lagoon complex (C, D, E, and F), which was part- sediments are solely found in depressions around salt and the thicknesses of the various ly destroyed during a subsequent regressive structures This rests the Late facies short distances. period. sequence on Oligocene vary greatly over Branden Formation in the eastern part of the area Palaeotopography
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    Scientia Marina 74(3) September 2010, 471-481, Barcelona (Spain) ISSN: 0214-8358 doi: 10.3989/scimar.2010.74n3471 Deep-water Drilliinae, Cochlespirinae and Oenopotinae (Mollusca: Gastropoda: Turridae) from the Campos Basin, southeast Brazil RAQUEL MEDEIROS ANDRADE FIGUEIRA and RICARDO SILVA ABSALÃO Departamento de Zoologia, Instituto de Biologia, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Ilha do Fundão, 21941-590 Rio de Janeiro, Rio de Janeiro, Brasil. E-mail: [email protected] SUMMARY: Samples of a soft-bottom community from the continental slope of Campos Basin, off southeast Brazil, were obtained between 2001 and 2003 by the Research Vessel “Astro-Garoupa” with a 0.25 m2 box corer or by dredging with a Charcot dredge. A total of 177 samples were taken at depths ranging from 700 to 1950 m. Mollusks were present at all of the stations and among Gastropoda the Turridae showed the highest diversity. Within the family Cochlespirinae we found: Leucosyrinx tenoceras (Dall, 1889), L. verrillii (Dall, 1881), expanding the known distribution of the latter species farther south, and L.? subgrundifera (Dall, 1888), which is the first record of this species for the South Atlantic and the shallowest depth at which it has ever been found. Within the family Drilliinae we found Splendrillia centimata (Dall, 1889), also the first record of this species for the South Atlantic and its shallowest depth. Within the subfamily Oenopotinae we describe here three new species in the genus Oenopota Mörch, 1852: O. seraphina n. sp., O. diabula n. sp. and O. carioca n. sp. Keywords: deep-water, Turridae, Leucosyrinx, Splendrillia, Oenopota, Southwestern Atlantic, Brazil.
  • MOLLUSCAN PALEONTOLOGY of the PLIOCENE-PLEISTOCENE LOWER SAUGUS FORMATION, SOUTHERN CALIFORNIA by Lindsey T

    MOLLUSCAN PALEONTOLOGY of the PLIOCENE-PLEISTOCENE LOWER SAUGUS FORMATION, SOUTHERN CALIFORNIA by Lindsey T

    PAGE 16 AMERICAN CONCHOLOGIST VOLUME 19(4) MOLLUSCAN PALEONTOLOGY OF THE PLIOCENE-PLEISTOCENE LOWER SAUGUS FORMATION, SOUTHERN CALIFORNIA by Lindsey T. Groves With the assistance of a generous COA research grant in 1987 to help with field and photographic expenses, I completed my Master of Science thesis in late 1990 at California State University, Northridge. In my work on the paleontology of the lower Saugus Formation, I com- pletely documented a rich invertebrate fauna of Pliocene-Pleistocene age through illustrations and extensive synonymies. I also included sections on stratigraphy, paleoenvironment, paleobiogeography, geo- logic age, and correlation of the lower Saugus Formation to others of similar age in central and southern California. My study area was in the eastern Santa Susana Mountains in Los Angeles and Ventura Counties (Fig. 1). Because most of this area is on private property, permission from land owners was required prior to entry. The richest fossiliferous deposit of the lower Saugus Formation is located in Gillibrand Quarry north of Simi Valley, California. From this locality nearly 89% of the total number of fossil species were collected from a particularly rich horizon informally named the "Pecten bed" for the abundant specimens of Patinopecten healeyi (Arnold, 1906) and Pecten (Pecten) bellus (Conrad, 1857). This locality is interpreted to have been deposited as an embayed channel and may represent a faunal community. Because of excellent preservation displayed by many specimens, post-mortem transport was probably 2.1 minimal. r LAcMlP = LAcMjP Fossils of the lower Saugus Formation are predominantly mollus- 11 can and include 43 bivalve species, 49 gastropod species, and one UaisT scaphopod species (Table 1).
  • Quaderno 26.Pmd

    Quaderno 26.Pmd

    Quaderno di Studi e Notizie di Storia Naturale della Romagna Quad. Studi Nat. Romagna, 26: 1-80 giugno 2008 ISSN 1123-6787 Cesare Tabanelli ASSOCIAZIONI DI PALEOCOMUNITÁ BATIALI A MOLLUSCHI BENTONICI NEL PLIOCENE DELLA ROMAGNA Metodologie ed indicazioni per nuove tematiche Riassunto L’autore analizza l’importanza che i fattori temperatura e batimetria hanno sulla distribuzione del bentos marino. Esamina poi i riferimenti bibliografici secondo i quali durante il Pliocene il Mare Mediterraneo era contrassegnato da una circolazione delle acque di tipo oceanico. Stando a questo modello erano presenti due corpi d’acqua aventi peculiarità termiche diverse: uno superiore di acque temperate calde (termosfera) ed uno inferiore di acque profonde fredde (psicrosfera). Conseguentemente essi dovevano essere separati da una zona di transizione (termoclino). Attualmente in Mediterraneo vige invece uno stato di omotermia calda. L’autore propone quindi di inquadrare le paleocomunità a molluschi bentonici relative al piano batiale, in tre diversi tipi di associazioni così denominate: - Associazione delle Paleocomunità soggette all’influenza della Termosfera (A.P.T.). - Associazione delle Paleocomunità soggette all’influenza della Psicrosfera (A.P.P.). - Associazione delle Paleocomunità Interposte (A.P.I.), ubicate nella zona del termoclino. Le prime due associazioni sono soprannominate “primarie” e le relative specie, sulla base dei dati riscontrati in campagna e desunti dalla bibliografia, vengono distinte in “esclusive” e “preferenziali”. Con il termine “abituali” sono state invece indicate quelle specie euriterme capaci di adattarsi sia sui fondali sottoposti all’influenza della termosfera che della psicrosfera. Questa suddivisione in categorie ha condotto alla realizzazione della tabella 1. Questa tiene conto solo delle specie ritrovate nei depositi profondi della successione romagnola e conseguentemente fa riferimento anche a dati inediti.