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Cretaceous research 15건

  1. [해외논문]   Editorial Board   SCI SCIE


    Cretaceous research v.82 ,pp. IFC - IFC , 2018 , 0195-6671 ,

    초록

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

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  2. [해외논문]   Lamniform sharks from the Cenomanian (Upper Cretaceous) of Venezuela   SCI SCIE

    Guinot, Guillaume (Institut des Sciences de l'Evolution de Montpellier (ISE-M, UMR 5554, CNRS/UM/IRD/EPHE), Université) , Carrillo-Briceñ (de Montpellier, 34095 Montpellier Cedex 5, France ) , o, Jorge D. (Paleontological Institute and Museum, University of Zurich, Karl-Schmid-Strasse 4, Zürich, 8006, Switzerland)
    Cretaceous research v.82 ,pp. 1 - 20 , 2018 , 0195-6671 ,

    초록

    Abstract Sampling of Cenomanian fossil-rich horizons within the La Luna Formation of two localities in the Zulia and Trujillo states (northern Venezuela) yielded numerous shark teeth belonging to various species within the order Lamniformes (Mackerel sharks). Twelve lamniform species were identified including three new species ( Squalicorax lalunaensis sp. nov., Squalicorax moodyi sp. nov., Acutalamna karsteni gen. et sp. nov.) and the genus Microcarcharias gen. nov. is proposed to accommodate with the peculiar morphology of the small-sized odontaspidid M. saskatchewanensis . Other taxa reported here include Cretoxyrhina mantelli , Cretolamna sp., cf. Nanocorax sp. and five Squalicorax species left in open nomenclature. This is the first report of chondrichthyans from the mid-Cretaceous of Venezuela and one of the few records of this group from the Cenomanian of South America. The composition of these assemblages suggests some degree of endemism in the La Luna Sea but also possible connexions with the Western Interior Seaway. One of the most striking features of these assemblages is the high anacoracid diversity (eight species) despite the corresponding outer shelf/upper slope palaeoenvironments of the La Luna Formation. The high diversity of these opportunistic predators is probably related to the high diversity of medium to large marine vertebrates that provided food resources.

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  3. [해외논문]   The earliest record of Asian Eusuchia from the Lower Cretaceous Khok Kruat Formation of northeastern Thailand   SCI SCIE

    Kubo, Tai (The University Museum, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan ) , Shibata, Masateru (Fukui Prefectural Dinosaur Museum, 51-11 Terao, Muroko, Katsuyama-Shi, Fukui, 911-8601, Japan ) , Naksri, Wilailuck (Northeastern Research Institute of Petrified Wood and Mineral Resources, Nakhon Ratchasima Rajabhat University, Mueang, Nakhon Ratchasima, 30000, Thailand ) , Jintasakul, Pratueng (Northeastern Research Institute of Petrified Wood and Mineral Resources, Nakhon Ratchasima Rajabhat University, Mueang, Nakhon Ratchasima, 30000, Thailand ) , Azuma, Yoichi (Fukui Prefectural Dinosaur Museum, 51-11 Terao, Muroko, Katsuyama-Shi, Fukui, 911-8601, Japan)
    Cretaceous research v.82 ,pp. 21 - 28 , 2018 , 0195-6671 ,

    초록

    Abstract We describe remains of a new crocodyliform found from the Lower Cretaceous (Aptian) Khok Kruat Formation, northeastern Thailand. Remains consist of two caudal ends of mandibles, two rostral symphyseal parts of right rami of mandibles, a dorsal part of postorbital, a cranial end of squamosal and one osteoderm. Phylogenetic analyses supported inclusion of this crocodyliform into the Eusuchia as it shares several morphological characters with other eusuchians, such as a dorsocaudally oriented retroarticular process, smooth lateral surface of the caudoventral region of mandible, and a craniocaudally oriented ridge on the dorsal surface of retroarticular process. The shape of symphyseal region showed this crocodyliform had a longirostrine snout shape, which is uncommon in early eusuchians. Finding of this crocodyliform draws back the oldest record of Asian eusuchians, which was Tadzhikosuchus , approximately 30 million years and it is the only Mesozoic eusuchian found in East and Southeast Asia.

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  4. [해외논문]   Spinotoma ruicheni: A new Late Cretaceous genus and species of wedge-shaped beetle from Burmese amber (Coleoptera, Ripiphoridae, Pelecotominae)   SCI SCIE

    Hsiao, Yun (Department of Entomology, National Taiwan University, No. 27, Lane 113, Sec. 4, Roosevelt Rd., 106, Taipei, Taiwan ) , Huang, Chia-Lung (Department of Life Sciences, National Taiwan Normal University, No. 88, Ting-Chow Rd, Sec. 4, 116, Taipei, Taiwan)
    Cretaceous research v.82 ,pp. 29 - 35 , 2018 , 0195-6671 ,

    초록

    Abstract A new genus and species of ripiphorid beetle is described based on a female specimen preserved in Upper Cretaceous (Cenomanian, ca. 99 Ma) amber from northern Myanmar, under the name of Spinotoma ruicheni gen. et sp. nov. It belongs to the extant Pelecotominae and represents the second documented occurrence of this subfamily in the Late Cretaceous. This new taxon is morphologically distinguishable in Pelecotominae by the combination of following characters: eyes oval, without incision; antennomeres V–X serrate, with XI fusiform; maxillary palpi unmodified; protarsi shorter than protibiae; tibiae sparsely provided with spines; tibial spurs formula 2-0-2. Together with other previously reported fossil ripiphorids, it highlights the species diversification of wedge-shaped beetles during their early evolution. On the other hand, a morphological similarity between Spinotoma and modern pelecotomines and the occurrence of xylophagous beetles in the Burmese amber suggest a similar host preference in wood-boring beetles for this species, shedding lights on an ancient host-parasitoid relationship in the late Mesozoic. This paper also provides a brief discussion on the taxonomy and evolution of Mesozoic wedge-shaped beetles. The wedged-shaped body form and fully-developed elytra in Recent Pelecotominae and Ptilophorinae are considered to be derived from their early ancestors rather than evolved with the onset of flowering plants during the Cretaceous as commonly thought.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

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  5. [해외논문]   A new genus and species of aphids, Tanyaulus caudisetula gen. et sp. nov. (Hemiptera: Aphidoidea: Burmitaphidae) in mid-Cretaceous Myanmar amber   SCI SCIE

    Poinar Jr., George
    Cretaceous research v.82 ,pp. 36 - 39 , 2018 , 0195-6671 ,

    초록

    Abstract A new genus and species of aphids, Tanyaulus caudisetula gen. et sp. nov. (Hemiptera: Aphidoidea: Burmitaphidae), is described from mid- Cretaceous Myanmar amber. Autapomorphies for the new genus are stub-like hind wings, 7-segmented antenna, long rostrum equal to body length, 4 veins departing from the main vein, cubital veins distinctly separated, with a very short, curved basal proximal cubitus, one-branched M vein with distal fork arched at the base, distinct claval folds at wing bases and caudal protuberance with extended setae. The new fossil adds to our knowledge of the morphological diversity of Mesozoic Aphidoidea. Highlights Mid-Cretaceous aphid. Long rostrum. Myanmar amber. Setae on caudal protuberance.

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  6. [해외논문]   Bathymetric trend of Late Cretaceous southern Tethys upwelling regime based on benthic foraminifera   SCI SCIE

    Ashckenazi-Polivoda, Sarit (Dead Sea and Arava Science Center, Tamar Regional Council, Dead Sea Mobile Post, 86910, Israel ) , Titelboim, Danna (Department of Geological and Environmental Sciences, Ben-Gurion University of the Negev, P.O.B 653, Beer Sheva, 84105, Israel ) , Meilijson, Aaron (Department of Geological and Environmental Sciences, Ben-Gurion University of the Negev, P.O.B 653, Beer Sheva, 84105, Israel ) , Almogi-Labin, Ahuva (Geological Survey of Israel, Jerusalem, 95501, Israel ) , Abramovich, Sigal (Department of Geological and Environmental Sciences, Ben-Gurion University of the Negev, P.O.B 653, Beer Sheva, 84105, Israel)
    Cretaceous research v.82 ,pp. 40 - 55 , 2018 , 0195-6671 ,

    초록

    Abstract Benthic foraminifera are one of the most commonly used indicators to infer paleodepth. The information on depth distribution of fossil benthic foraminifera is generally obtained from normal marine environments. However, a significant gap exists with respect to implications of benthic foraminiferal distributions in unique sedimentary successions, such as those deposited under upwelling regimes. In such settings, the paleobathymetric signal is somewhat obscured by the extreme food fluxes and oxygen depletion at the seafloor that cause changes in benthic foraminiferal assemblage composition. Nevertheless, the dynamics of upwelling systems, and as a result the sediment and organic matter accumulation, are known to be directly influenced by eustatic changes, making paleobathymetric reconstruction highly valuable for understanding these systems. The Upper Cretaceous high productivity marine succession of southern Israel, with its variable lithologies, provides a unique opportunity for addressing this issue. Through this succession, a significant turnover in the benthic foraminiferal assemblages is observed associated with a sharp change in lithology from phosphate (Phosphate Member) to organic rich carbonates (Oil Shale Member; OSM). Statistical nMDS analysis distinguished four groups of species indicative of distinct depth habitats: 500 m. Each one of these groups corresponds to different parts of the sequence. According to our analysis, the shift in the benthic foraminiferal assemblages is attributed to a distinct regional deepening from shelf environment ( 500 m) during the Maastrichtian. While taking into account other factors affecting benthic foraminiferal distribution, this study demonstrates that depth distribution models based on normal marine settings might also be applicable as proxies for paleobathymetry in high productivity environments. Highlights During the Late Cretaceous an extensive upwelling regime prevailed in the Negev, Southern Israel. Benthic foraminifera were used to infer water depth trends of the Negev high productivity sequence. Statistical analysis assign to discern groups of species associated with distinct depth habitats. Deepening from shelf to middle bathyal observed from the upper Campanian to the Maastrichtian. Normal marine benthic depth models found applicable for paleobathymetry in upwelling setting.

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  7. [해외논문]   The Late Cretaceous Pterophyllum (Bennettitales) in the North-East of Russia   SCI SCIE

    Gnilovskaya, Anastasia A. (Corresponding author.) , Golovneva, Lina B.
    Cretaceous research v.82 ,pp. 56 - 63 , 2018 , 0195-6671 ,

    초록

    Abstract The Late Cretaceous Pterophyllum species survived as relict elements in areas influenced by volcanism in the North-East of Russia. Two new species are described: P. philippoviae Gnilovskaya from the Turonian-Coniacian deposits of the Vetvinskaya Unit (Penzhina and Oklan Rivers interfluve, Magadan Region) and P. terechoviae from the Maastrichtian deposits of the Kakanaut Formation (Kakanaut River Basin, Koryak Upland). The upper boundary of Pterophyllum stratigraphic range is extended from the Turonian-Coniacian up to the K/Pg boundary. Pterophyllum terechoviae is the youngest member of the genus and probably the latest occurrence of Bennettitales in the Northern Hemisphere. Highlights The latest record of Bennettitales in Northern Hemisphere is presented. The upper boundary of Pterophyllum stratigraphic range is extended up to the Maastrichtian. The Late Cretaceous Pterophyllum survived as relict elements in areas influenced by volcanism in the North-East of Russia. Two new species of Pterophyllum are described.

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  8. [해외논문]   An integrated study of upper Campanian-lower Maastrichtian carbon isotopes and calcareous plankton biostratigraphy of the Kurdistan Region, northeastern Iraq   SCI SCIE

    Farouk, Sherif (Exploration Department, Egyptian Petroleum Research Institute, Nasr City, 11727, Egypt ) , Thibault, Nicolas (Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Voldgade 10, DK-1350, Copenhagen C., Denmark ) , Jaff, Rawand B.N. (Department of General Sciences, College of Education and Natural Sciences, Charmo University, 46023, Chamchamal, Sulaimani, Kurdistan region, Iraq ) , Faris, Mahmoud (Geology Department, Faculty of Science, Tanta University, Egypt ) , Ahmad, Fayez (Faculty of Natural Resources and Environment, Department of Earth and Environmental Sciences, The Hashemite University, Jordan ) , Khashaba, Ahmed (National Research Institute of Astronomy and Geophysics, Egypt)
    Cretaceous research v.82 ,pp. 64 - 80 , 2018 , 0195-6671 ,

    초록

    Abstract New carbon (δ 13 C) isotope records calibrated by planktonic bioevents provide general support for a late Campanian age assignment of the Shiranish Formation (Fm.) and its boundaries in the Dokan section (NE Iraq). The Shiranish Fm. is characterised at the base by a mid-Campanian unconformity as can be interpreted by absences of nannofossil zones CC20-21. The Shiranish Fm. then spans nannofossil biozones CC22-CC23a (UC15d-e TP to UC16a TP ). Results obtained on carbon isotopes suggest that diagenesis affected and compromised a few carbonate samples in the uppermost 50 m of the section. However, once these samples are discarded, pristine trends suggest that the top of the section records a negative carbon isotope excursion that is interpreted as CMBa-c events that straddle the Campanian–Maastrichtian boundary. This interpretation is supported by the lowermost occurrence of planktic foraminifers Rugoglobigerina scotti and Contusotruncana contusa some 30 m above the base of the negative excursion and 10 m below a positive excursion identified as the Maastrichtian M1+ event. Discrepancies in the stratigraphic range of several planktic foraminifer bioevents are highlighted and advocate for the need of many more integrated records of planktic foraminifer and nannofossil biostratigraphy alongside carbon isotope stratigraphy in the eastern Tethys in order to improve regional and global schemes. Highlights New carbon (δ 13 C) isotope records In Iraq. This record is calibrated with the microplanktonic bioevents. Some bioevents show considerable variation in age.

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  9. [해외논문]   Comments on “A tyrannosaur trackway at Glenrock, Lance Formation (Maastrichtian), Wyoming” (Smith et al., Cretaceous Research, v. 61, pp. 1–4, 2016)   SCI SCIE

    Ruiz, Javier
    Cretaceous research v.82 ,pp. 81 - 82 , 2018 , 0195-6671 ,

    초록

    Abstract The paper by Smith et al. (2016) included speed calculations performed from a tyrannosaur trackway at Glenrock, Lance Formation, Wyoming. These authors concluded that tyrannosaurs walked in speeds similar to those obtained for other large theropod, but faster than proposed for hadrosaurids, a potential prey. However, the calculations performed by Smith et al. (2016) suffered from methodological and computational errors, which greatly affected the reported results. Here I show that when speeds are correctly calculated from the Glenrock trackway, the obtained values are clearly (about 50–80 percent) higher than the wrong values quoted by these authors. This support even more a significant speed capability for tyrannosaurs than claimed by Smith et al. (2016).

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  10. [해외논문]   New plesiosaurian specimens (Reptilia, Plesiosauria) from the Upper Cretaceous (Turonian) of Goulmima (Southern Morocco)   SCI SCIE

    Allemand, Ré (Centre de Recherches sur la Paléobiodiversité) , mi (et les Paléoenvironnements, CR2P –) , Bardet, Nathalie (UMR 7207 –) , Houssaye, Alexandra (CNRS, MNHN, UPMC, Muséum National d'Histoire Naturelle, Sorbonne Universités, 57 rue Cuvier, CP38, F-75005, Paris, France ) , Vincent, Peggy (Centre de Recherches sur la Paléobiodiversité)
    Cretaceous research v.82 ,pp. 83 - 98 , 2018 , 0195-6671 ,

    초록

    Abstract Two new plesiosaurian specimens coming from lower Turonian deposits of Goulmima in Morocco are described. The three-dimensional digital reconstructions of both specimens provide details about their skull roof, mandible and atlas-axis complex. In addition, computed tomography allows to reconstruct their braincase, which is a part of the skull poorly known among plesiosaurians due to either poor preservation and/or insufficient preparation, but that offers a large number of characters used in phylogenetical analyses. After descriptions and comparisons, the two specimens D1-8213 and MNHN F-GOU14 are assigned to Libonectes morgani and to an undetermined Polycotylidae, respectively. The presence of the North American taxon Libonectes morgani in the deposits of Goulmima confirms a trans-Atlantic faunal connectivity at that time and that Elasmosauridae were able to exploit the open marine environment for dispersion. Polycotylids have already been described from Goulmima; however, the typical preservation of these specimens in nodules prevented their preparation and the access to their internal anatomy. Here, the use of X-ray computed tomography shows the strong interest to use such a technique and provide new anatomical details.

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    Fig. 1 이미지

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