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| Registros recuperados: 20 | |
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| KELLNER,ALEXANDER W.A.; WEINSCHÜTZ,LUIZ C.; HOLGADO,BORJA; BANTIM,RENAN A.M.; SAYÃO,JULIANA M.. |
| Abstract Abstract: The first pterosaur bone bed from Brazil was reported in 2014 at the outskirts of the town Cruzeiro do Oeste, Paraná State, in the Southern region of the country. Here named 'cemitério dos pterossauros' site, these outcrops were referred to the Goio-Erê Formation (Turonian-Campanian) of the Caiuá Group (Bauru Basin) and revealed the presence of hundreds of isolated or partially articulated elements of the tapejarine pterosaur Caiuajara and fewer amounts of a theropod dinosaur. Here we present a new tapejaromorph flying reptile from this site, Keresdrakon vilsoni gen. et sp. nov., which shows a unique blunt ridge on the dorsal surface of the posterior end of the dentary. Morphological and osteohistological features indicate that all... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Paleoecology; Pterosauria; Pterodactyloidea; Keresdrakon vilsoni; Paraná; Cretaceous. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000400517 |
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| Souza,Paulo A.; Perinotto,José A.J.; Félix,Cristina M.; Araújo,Bruno C.. |
| The Aquidauana Formation is a Permo-Carboniferous sedimentary unit, widely stratigraphicaly distributed in the northwestern and northern portions of the Paraná Basin. However, little paleontological data is available from this formation, preventing accurate biostratigraphic and paleoecological interpretations. An abundant, diversified and well preserved assemblage of palynomorphs was recognized from sampling conducted in an outcrop section in Cipolândia District of Aquidauana Municipality, state of Mato Grosso do Sul, Brazil. A total of 35 indigenous palynomorph taxa was recognized, comprising 6 species of spores (related to 5 genera), 28 species of pollen grains (14 genera) and 1 species of chlorophycean algae. Monosaccate pollen grains are exceptionally... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biostratigraphy; Paleoecology; Palynology; Pennsylvanian. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000200611 |
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| Freitas,Aline Gonçalves de; Carvalho,Marcelo de Araujo; Toledo,Mauro Bevilacqua de; Mendonça,Claudia Barbieri Ferreira; Gonçalves-Esteves,Vania. |
| This paper presents morphological descriptions and ecological data of cryptogam spores and other non-pollen palynomorphs from Quaternary sediments of Campos Basin, Rio de Janeiro, SE Brazil. The ages were derived from biostratigraphy of planktonic foraminifers and two radiocarbon dates, and suggest that sediment deposition started in the last 140,000 years BP. Thirty different types of palynomorphs were identified, described, and photographed: two bryophyte spores (sensu lato); 21 pteridophyte spores; four freshwater microalgae; onePseudoschizaea; and two microfungi. Some of the identified spores (Sphagnum, Blechnum, Cyatheaceae, Dennstaedtiaceae, Lycopodiella, Microgramma, Polypodium, Acrostichum, Pityrogramma, and Lygodium) are related to the modern... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Campos Basin; Late Pleistocene; Non-pollen palynomorphs; Paleoecology; Spores. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000200161 |
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| Penaud, Aurelie; Hardy, William; Lambert, Clement; Marret, Fabienne; Masure, Edwige; Seryais, Thomas; Siano, Raffaele; Wary, Melanie; Mertens, Kenneth. |
| Dinoflagellates are part of the marine plankton and about 200 species produce a cyst (dinocyst) during their life cycle, these organic-walled sexually-produced cysts being fossilizable in sediments for hundreds of millions of years. Over the past 40–50 years, dinocysts have led to major advances on Mesozoic-Cenozoic research, in terms of biostratigraphy and paleogeogeography. Dinocyst taxonomy has then been continuously revised, with the tabulation being the main morphological link between living dinoflagellates and fossilized cysts. Over the Quaternary, and based on the principle of uniformitarianism (i.e. species ecology did not change through time), relationships between modern assemblages and present-day environmental factors controlling their... |
| Tipo: Text |
Palavras-chave: Dinoflagellate; Cyst-motile stage relationship; Modern dinocyst distribution; Paleoecology; Biostratigraphy; Ancient DNA. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00463/57476/59749.pdf |
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| CARRILLO-BRICEÑO,JORGE D; GONZÁLEZ-BARBA,GERARDO; LANDAETA,MAURICIO F; NIELSEN,SVEN N. |
| Twelve taxa of chondrichthyan fossils from strata assigned to the Upper Pliocene of the Horcón Formation, Valparaiso region, central Chile, are described and prior records paleobiogeography and paleoenvironmental implications are discussed. The fauna includes Callorhinchus sp., Heterodontus sp., Carcharodon carcharias, Isurus oxyrinchus, Galeorhinus galeus, Carcharhinus brachyurus, Hexanchus griseus, Squatina sp., Pristiophorus sp., Rajidae, Dasyatidae and Myliobatidae. This is one of the most diverse chondrichthyan associations of the Late Neogene of Chile and the rest of South America. |
| Tipo: Journal article |
Palavras-chave: South America; Paleobiogeography; Paleoecology; Neogene; Fossil sharks and rays. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2013000200008 |
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| Poitevin, Pierre; Thébault, Julien; Siebert, Valentin; Donnet, Sébastien; Archambault, Philippe; Doré, Justine; Chauvaud, Laurent; Lazure, Pascal. |
| The Northwest Atlantic is a key region with an essential role in global climate regulation, redistributing heat and influencing the carbon cycle. However, little is known about its evolution before 1950, mainly because of the lack of long-term instrumental measurements. The hard parts of long-lived marine biota hold the potential to extend instrumentally derived observation by several decades or centuries and enhance our understanding of global climate processes. Here, we investigate the effects of local, regional, and large-scale climate variability on the marine bivalve, Arctica islandica (Linnaeus, 1767) from Saint-Pierre and Miquelon (SPM). This archipelago lies at the boundary zone between the cold Labrador Current in the north and the warm Gulf... |
| Tipo: Text |
Palavras-chave: Arctica islandica; Paleoecology; North Atlantic; Sub polar gyre; Labrador current; Bivalve; Sclerochronology; Climate change. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00509/62050/66198.pdf |
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| Klouch, Khadidja; Schmidt, Sabine; Andrieux-loyer, Francoise; Le Gac, Mickael; Hervio-heath, Dominique; Qui-minet, Zujaila Nohemi; Quere, Julien; Bigeard, Estelle; Guillou, Laure; Siano, Raffaele. |
| The multiannual dynamic of the cyst-forming and toxic marine dinoflagellate Alexandrium minutum was studied over a time scale of about 150 years by a paleoecological approach based on ancient DNA (aDNA) quantification and cyst revivification data obtained from two dated sediment cores of the Bay of Brest (Brittany, France). The first genetic traces of the species presence in the study area dated back to 1873 ± 6. Specific aDNA could be quantified by a newly-developed real-time PCR assay in the upper core layers, in which the germination of the species (in up to 17–19 year-old sediments) was also obtained. In both cores studied, our quantitative paleogenetic data showed a statistically significant increasing trend in the abundance of A. minutum ITS1 rDNA... |
| Tipo: Text |
Palavras-chave: Paleoecology; Ancient DNA; Real-time PCR; Harmful algal blooms (HAB); Dinoflagellates; Coastal ecology. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00334/44516/44212.pdf |
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| Poirier, Clement; Sauriau, Pierre-guy; Chaumillon, Eric; Bertin, Xavier. |
| Mollusc death assemblages were recovered in 98 subtidal sampling stations on the seafloor of the shallow Pertuis Charentais Sea (Atlantic coast of France). Taxonomic composition and spatial distribution of death assemblages were investigated, as well as their response to sediment grain size (field data), bottom shear stress (coupled tide and wave hydrodynamic modelling), and sediment budget (bathymetric difference map) Results showed that molluscs are likely to be reliable paleoenvironmental indicators since death assemblages were able to acquire ecological changes within years (decadal-scale taphonomic inertia), and live-dead agreement inferred from existing data on living benthic communities was high, except close to river mouths and intertidal mudflats... |
| Tipo: Text |
Palavras-chave: Benthos; Estuary; Holocene; Paleoecology; Sediment budget; Taphonomy. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00017/12814/10260.pdf |
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| Leme,Juliana de Moraes; Simões,Marcello Guimarães; Rodrigues,Sabrina Coelho; Van Iten,Heyo; Marques,Antonio Carlos. |
| Renewed interest in conulariids has resulted in clarification of problems in the paleobiology of this group. Discoveries of skeletal structures and specimens preserved in situ, coupled with cladistic analyses, have led to a revival of Kiderlen's (1937) hypothesis that conulariids were polypoid scyphozoans or a sister taxon of this class. Until 1979, research on conulariids centered on the description of new species and on the erection of subgroups using phenetic approaches. Few papers addressed the paleobiology and phylogenetic affinities of conulariids, and none employed cladistics. In contrast, the 1980's saw the publication of major papers on the paleoecology of conulariids, and during this decade the hypothesis that conulariids were benthic organisms... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conulariids; Cnidaria; Scyphozoa; Systematics; Paleoecology; Taphonomy. |
| Ano: 2008 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142008000200013 |
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| Martínez,Sergio; Rojas,Alejandra; Ubilla,Martín; Verde,Mariano; Perea,Daniel; Piñeiro,Graciela. |
| Dates of marine Holocene molluscs from Uruguay (Villa Soriano Formation) range from 6849 to 1858 cal. years BP. There are no significative gaps among the different ages obtained, with the exception of the interval 2276-2830 calculated years BP. Two kinds of concentrations are distinguished: autochthonous, for which a low energy depositional environment is inferred, and parautochthonous, deposited in foreshore and nearshore high-energy environments. Results of different types of multivariate analyses on presence-absence and abundance data show that only three localities are clearly differentiated from the others. The discrimination of two of them (Arazatí, Las Cañas) is explained by the presence of only one or two species, but the third (Punta Rasa) is the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Uruguay; Holocene; Paleoecology; Shell-beds; Mollusca; Bivalvia; Gastropoda. |
| Ano: 2006 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142006000200009 |
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| Macedo,Renato B.; Souza,Paulo A.; Bauermann,Soraia G.; Bordignon,Sérgio A.L.. |
| A sedimentar core collected at Santo Antônio da Patrulha, Rio Grande do Sul State, southmost Brazil, was submitted to pollen analysis to provide the vegetational history of this region, and the paleoecological and paleoclimatic changes. A total of 98 taxa of palynomorphs was identified from 35 subsamples. Three radiocarbonic datings were obtained along a section of 115 cm depth, including the basal age of 4730 ± 50 yr BP. Pollen diagrams and cluster analysis were performed based on palynomorphs frequencies, demonstrating five distinct phases (SAP-I to SAP-V), which reflected different paleoecological conditions. The predominance of plants associated with grasslands in the phase SAP-I suggests warm and dry climate conditions. A gradual increasing of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Palynology; Paleoecology; Paleoclimatology; Atlantic rainforest; Late Holocene; Rio Grande do Sul State. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000300020 |
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| Samartin, Stephanie; Heiri, Oliver; Kaltenrieder, Petra; Kühl, Norbert; Tinner, Willy. |
| Vegetation and climate during the last ice age and the Last Glacial Maximum (LGM, similar to 23,000-19,000 cal BP) were considerably different than during the current interglacial (Holocene). Cold climatic conditions and growing ice-sheets during the last glaciation radically reduced forest extent in Europe to a restricted number of so-called "refugia", mostly located in the southern part of the continent. On the basis of paleobotanical analyses the Euganian Hills (Colli Euganei) in northeastern Italy have previously been proposed as one of the northernmost refugia of temperate trees (e.g. deciduous Quercus, Tilia, Ulmus, Fraxinus excelsior, Acer, Abies alba, Fagus sylvatica, Carpinus and Castanea) in Europe. In this study we provide the first... |
| Tipo: Text |
Palavras-chave: Chironomids; Refugia; Vegetation; Northern Italy; Mediterranean; Climate; Last Glacial; LGM; Heinrich events; Paleoecology; Paleoclimatology. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00421/53234/54773.pdf |
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| Delebecq, Gaspard; Schmidt, Sabine; Ehrhold, Axel; Latimier, Marie; Siano, Raffaele. |
| The biological processes involved in the preservation, viability, and revival of long‐term dormant dinoflagellate cysts buried in sediments remain unknown. Based on studies of plant seed physiology, we tested whether the revival of ancient cysts preserved in century‐old sediments from the Bay of Brest (France) could be stimulated by melatonin and gibberellic acid, two molecules commonly used in seed priming. Dinoflagellates were revived from sediments dated to approximately 150 years ago (156 ± 27, 32 cm depth), extending the known record age of cyst viability previously established as around one century. A culture suspension of sediments mixed with melatonin and gibberellic acid solutions as biostimulants exhibited germination of 11 dinoflagellate taxa... |
| Tipo: Text |
Palavras-chave: Alexandrium; Cyst; Dinoflagellate; Gibberellic acid; Melatonin; Paleoecology; Priming; Scrippsiella; Resurrection ecology. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00627/73960/73321.pdf |
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| Álvarez Sierra, M.A.; García Paredes, I.; Hoek Ostende, L.W. van den; Meulen, A.J. van der; Peláez-Campomanes, P.; Sevilla, P.. |
| The micromammal fauna from the Middle Miocene (Middle Aragonian) of La Retama, eastern central Spain, is described. It is a relatively poor rodent fauna composed by ten species only, associated to a highly diverse bat fauna, which includes five genera. The insectivores are represented by two species. This fossil assemblage has been correlated to zone Db (MN 5). The palaeoenvironmental reconstruction based on micromammals indicates open and dry conditions for this locality. Se describen los micromamíferos del Mioceno medio (Aragoniense medio) de La Retama, sector centro-oriental español. La fauna de roedores es relativamente pobre y está compuesta únicamente por diez especies. Sin embargo, cabe destacar la elevada diversidad de los quirópteros,... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Rodents; Insectivores; Bats; Systematic; Biochronology; Paleoecology; 38.22; 42.84. |
| Ano: 2006 |
URL: http://www.repository.naturalis.nl/record/327712 |
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| Schultze, H.-P.; Chorn, J.. |
| were present in North America ( The lungfish Sagenodus is a widespread Permo-Carboniferous genus found in Europe and North America. Important localities in the U.S.A. include Middle Pennsylvanian coals near Linton, Ohio, Upper Pennsylvanian deposits near Robinson and Hamilton, Kansas, and Peoria, Illinois; Lower Permian sediments near Cameron, Ohio; and Lower Permian “Red Beds” of Texas and Oklahoma. At least three species of Sagenodus S. copeanus, S. periprion, S. serratus). S. ohiensis is represented solely by one skull. Knowledge of the osteology of Sagenodus is enhanced by the study of well-preserved but disassociated elements from Robinson, Kansas ( S. copeanus) and Little Bitter Creek, Texas (S. serratus). The orbital series is now known to be... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Dipnoi; Sagenodus; Permo-Carboniferous; Systematics; Paleoecology; Phylogeny. |
| Ano: 1997 |
URL: http://www.repository.naturalis.nl/record/534319 |
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| Registros recuperados: 20 | |
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