J m pacaud (9 Ergebnisse)

21 S., 7 Abb., Sprache: Deutsch Gewicht in Gramm: 500.

The genus Pseudocypraea Schilder, 1927 (Gastropoda, Cypraeoidea, Ovulidae) was previously known by the living type species Pseudocypraea adamsonii (Sowerby, 1832) from Indo-Pacific Province, Galapagos and Coco islands and by the deep-water species Pseudocypraea exquisita Petuch, 1979 from the Philippines and South Africa. Pseudocypraea dolini n. sp. is described here from the Bartonian (Marinesian, middle Eocene) of Le Quoniam (Haravilliers, Val d?Oise, France). Pseudocypraea eratoformis (Hoernes & Auinger, 1880) n. comb. is also proposed for Cypraea (Cypraeovulva) eratoformis Hoernes & Auinger, 1880 from the Langhian (early Badenian, middle Miocene) of Lapugiu de Sus (?Lapugy?, Rumania). These two fossils confirm the diagnostic characters of Pseudocypraea , hitherto only based on the two extant species. The total number of species is now raised to four and the geographical distribution of the genus enlarged. 12 pp., 6 figs, stapled gr. 8.…

This paper includes an addition to the knowledge of Eocithara Fischer, 1883 and a phylogenetic analysis of the related genera. Four Eocithara (s.s.) species are newly recorded in the lower Eocene of the Atlantic Ocean (E. (s.s.) mutica (Lamarck, 1803), E. (s.s.) helenae n. sp., E. (s.s.) sp. 1 and E. (s.s.) sp. 2). Three new species are described: E. (s.s.) rosenkrantzi n. sp. (Thanetian, Greenland), E. (s.s.) helenae n. sp. (Ypresian, France) and E. (s.s.) eucosmia n. sp. (Bartonian, France). For the first time, multispiral protoconchs of Eocithara (s.s.) are reported ( E. (s.s.) helenae n. sp., E. (s.s.) jacksonensis (Harris, 1896) (Priabonian, USA) and E. (s.s.) submutica (d?Orbigny, 1852) (Rupelian, France)). This discovery invalidates the distinction between Harpa R?ding, 1798 and Eocithara based on the protoconch (Rehder 1973). Then, a closer inspection of 31 teleoconch characters is provided and tested in a cladistic analysis including Morum R?ding, 1798 (one Recent and one fossil species), Eocithara (s.s.) (five fossil species), E. (Refluharpa) Iredale, 1931 (one fossil species), E. (Marwickara) Laws, 1935 (one fossil species), Harpa (four Recent and one fossil species) and Austroharpa Finlay, 1931 (four Recent and one fossil species). The matrix has been processed by the software PAUP 4 and generates three equally parcimonious trees. The consensus tree suggests that all Eocithara are more closely related to Harpa than to Austroharpa. A considerable biogeographic congruence is noted (the Austral clades being clearly distinguished from the Thetyan clades) and the stratigraphical congruence is evaluated by the MSM (Manhattan Stratigraphic Measure) at specific and generic levels. 27 pp., 10 figs, stapled gr. 8.…

La malacofaune danienne du Bassin de Paris pr?sente un int?r?t chronologique de premier plan pour l?tude de la diversification des ?cosyst?mes marins en Europe au d?but du C?nozo?que. La m?thode consistant ? ?tudier syst?matiquement les empreintes externes de mollusques en faisant des moulages en ?lastom?re de silicone montre une diversit? faunistique inattendue. Le pr?sent article traite de la syst?matique de 23 esp?ces appartenant aux Patellogastropoda et aux Vetigastropoda (pro parte) des d?p?ts p?rir?cifaux de Vigny (Val-d?Oise, France) et des autres gisements daniens du Bassin de Paris. Il est le premier d?une s?rie o? seront r?vis?s les mollusques. Dix nouvelles esp?ces sont d?crites et sont inclues dans les familles Acmaeidae (Scurria dysporista n. sp., Scurriopsis deretrana n. sp.), Fissurellidae (Emarginula (s.s.) horrida n. sp., E. (s.s.) minacis n. sp., E. (s.s.) eucosmia n. sp., E. (s.s.) cavernosa n. sp., Entomella necopinata n. sp., Hemitoma (Montfortia) davincii n. sp., Clypidina (Montfortula) celinae n. sp.) et Pleurotomariidae (Leptomaria meyeri n. sp.). Neuf esp?ces sont signal?es pour la premi?re fois dans le Danien du Bassin de Paris (Acmaea simplex, Patella vincenti, Proscutum montense n. comb., Emarginula (s.s.) coralliora, E. (s.s.) montensis, Diodora corneti, D. dolloi, D. concentrica, Praescissurella corneti). Emarginula cretacea d?Orbigny, 1850 est consid?r? comme un nomen dubium. Une esp?ce nouvelle du Than?tien de Biou?s (Haute-Garonne), Emarginula (s.s.) villattae n. sp., est introduite et Emarginula (s.s.) jagti n. nom. est propos? en remplacement de Emarginula radiata Binkhorst, 1861 non Adams, 1851. 53 pp., 23 figs, stapled gr. 8.…

Couverture souple. Zustand: bon. RO20275174: 20234. In-4. Broché. Etat d'usage, Couv. convenable, Dos satisfaisant, Quelques rousseurs. 200 PAGES - texte sur deux ou trois colonnes - Nombreuses illustrations couleur, dans et hors texte. . . . Classification Dewey : 70.49-Presse illustrée, magazines, revues. …

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The Cenozoic Pleiotritoninae (Mollusca: Neogastropoda: Cancellarioidea: Cancellariidae) of the Aquitaine basin, southwestern France. The Cenozoic species belonging to the subfamily Plesiotritoninae Beu & Maxwell, 1987 (Cancellariidae ) currently known from the Aquitaine Basin, southwestern France, are studied. Geological and geographical settings of the sites involved are specified. Apart from Loxotaphrus thorei (Grateloup, 1845), seven new species are described here: Plesiotriton aucoini, early Oligocene (late Rupelian) of Espibos, Gaas (Landes); P. camiadeorum, early Oligocene (late Rupelian) of Lagouarde, Gaas (Landes); P. ganensis and P. teuleraensis, both early Eocene (middle-late Ypresian, Cuisian) of La Teulere, Gan (Pyr?n?es-Atlantiques); Tritonoharpa aquitaniensis, early Miocene (early Burdigalian), Vives quarry, Meilhan (Landes); T. mariechristinae, middle Miocene (Langhian) of G?lis quarry, Le Houga (Gers); T. renardi, middle Miocene (Serravallian) of Carr? or historically Carrey, Sallespisse (Pyr?n?es-Atlantiques). Triton speciosum Bellardi, 1873 is here placed in Tritonoharpa; for Triton praetextum Bellardi, 1873 no position could be adopted for lack of good material. The species introduced under the name Tritonidea (Cantharus) aturensis (Peyrot, 1927) is here considered to be an ecomorph of the very variable species Loxotaphrus thorei (Grateloup, 1845), besides L. thorei morph thorei, L. thorei morph estotiensis and L. thorei morph laevis. Loxotaphrus abnormis (Bayan, 1870) is considered to be different from L. thorei, but Loxotaphrus subtaurinensis (Vergneau, 1965) is considered to be a synonym of L. thorei. The new genus Beuella (Cancellariidae: Plesiotritoninae) is proposed for Tritonidea pisanelloides Cossmann in O?Gorman & Cossmann, 1923 of the Cuisian of Gan (Pyr?n?es-Atlantiques). Les Plesiotritoninae (Mollusca, Gastropoda, Cancellariidae) de l?Eoc?ne du bassin de Paris, du Cotentin, de Loire-Atlantique et d?Aquitaine. Les esp?ces de l?oc?ne du bassin de Paris, du Cotentin, de la Loire-Atlantique et d?Aquitaine appartenant ? la sous-famille des Plesiotritoninae sont ?tudi?es. 8 esp?ces sont d?crites comme nouvelles : Plesiotriton cailloelensis nov. sp., P. evanesco nov. sp., P. calciatus nov. sp. et Colubratriton garini nov. sp. du Lut?tien (?oc?ne moyen) du bassin de Paris; P. jacquesponsi nov. sp. et P. clandestinus nov. sp. du Bartonien (?oc?ne moyen) du bassin de Paris, Tritonoharpa caunbonensis nov. sp. du Bartonien (?oc?ne moyen) de la Loire-Atlantique et Colubratriton merlei nov. sp. du Cuisien (Ypr?sien, ?oc?ne inf?rieur) du bassin d?Aquitaine. Le mat?riel type de Plesiotriton volutellus (Lamarck, 1803), esp?ce type du genre Plesiotriton, est consid?r? comme perdu; un n?otype est d?sign? Tritonoharpa caunbonensis nov. sp. du Bartonien (?oc?ne moyen) de la Loire-Atlantique repr?sente la plus ancienne occurrence de ce genre et nous permet d?tendre sa long?vit? Le nouveau genre Colubratriton est propos? pour l?esp?ce Plesiotriton deshayesianus Beu & Maxwell, 1987; un lectotype est d?sign? pour cette esp?ce. Les esp?ces nouvelles Fusiaphera esus nov. sp. du Cuisien (Ypr?sien, ?oc?ne inf?rieur) du bassin de Paris et F. kassitiana nov. sp. du Maastrichtien (Cr?tac? sup?rieur) d?Iran sont introduites. Pisanella marieastridae n. nom. est propos? en remplacement de Voluta fusiformis Defrance, 1829 non Brocchi, 1814 nec Turton, 1819 nec Swainson, 1822. 64+56 pp., 14+6 figs, 7+6 tabs, 13+12 pls, br. 4. …

This monograph of a rich fossil fauna of the Paris basin gives account of a mid-Thanetian locality. The facies changes within two quarries allow to subdivide the Ch?lons-sur-Vesle Formation into several subunits. Bathymetry and distance to the shore of the infralittoral sands are deduced from sediment analyses and fossil assemblage interpretations. Variations in the mixture of subautochtonous and displaced molluscs, and of infralittoral marine biotopes, shorelines and continental subenvironments suggest a transgressive-regressive local evolution. Several topics are studied in greater detail: the deformation structures on the lower sand, interpreted as seismites; the stratigraphic distribution of the foraminifera and their environmental significance; the regional interpretation of fish biodiversity (sharks, rays and teleosteans); the four main steps in changes of the molluscs assemblages, by means of specimen counting per species. Of special interest is the oyster s paleoecology (attachment on Dasycladaceae and sea-grass) and the boring predation-marks by Naticidae and Muricidae on molluscs, and their use in the reconstruction of different life-environmentsof the assemblage s components. An atlas of 33 plates shows the different facies of sand subunits, from the quarry to cleaned horizontal samples of shell accumulations, and a very complete iconography, especially of vertebrates and molluscs, of the taxa collected at Cauroy-l?s-Hermonville and Prouilly (Marne). The plate captions of molluscs include systematics and ecological comments, with reference to the present distribution of related species. The palaeoenvironmental and climatic interpretations of this fossil assemblage, representative of the inner Parisian gulf of the mid-Paleocene (Middle Thanetian), are founded on the reconstruction of different shallow-water, marine sea beds, more or less influenced by subtropical sea-grass and Dasycladacean algae discontinuous cover and storm hydrodynamics. 119 pp., 22 figs, 33 pls, br. 4.…

205 p. (first paper is pages 1-180), 16, 2 figs, 41, 2 pls, 4to, paperbound. Cossmanniana. Volume 19.171 species of Conoidea are recorded from the Upper Oligocene of Aquitaine basin, accounting for nearly 14 % of all the gastropods that can be found there. Approximately 50 species were previously known from the same deposits. Out of these 171 species, 63 are described as new.…