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Registros recuperados: 39
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A new angiosperm from the Crato Formation (Araripe Basin, Brazil) and comments on the Early Cretaceous Monocotyledons Anais da ABC (AABC)
LIMA,FLAVIANA J. DE; SARAIVA,ANTÔNIO A.F.; SILVA,MARIA A.P. DA; BANTIM,RENAN A.M.; SAYÃO,JULIANA M..
The Crato Formation paleoflora is one of the few equatorial floras of the Early Cretaceous. It is diverse, with many angiosperms, especially representatives of the clades magnoliids, monocotyledons and eudicots, which confirms the assumption that angiosperm diversity during the last part of the Early Cretaceous was reasonably high. The morphology of a new fossil monocot is studied and compared to all other Smilacaceae genus, especially in the venation. Cratosmilax jacksoni gen. et sp. nov. can be related to the Smilacaceae family, becoming the oldest record of the family so far. Cratosmilax jacksoni is a single mesophilic leaf with entire margins, ovate shape, with acute apex and base, four venation orders and main acrodromous veins. It is the first...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Araripe Basin; Cratosmilax jacksoni; Cretaceous; Fossil leaf; Gondwana; Monocots.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000401657
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A new genus of dipnoiformes from the Cretaceous of Brazil Anais da ABC (AABC)
Toledo,Carlos E.V.; Sousa,Eliane P. de; Medeiros,Manuel A.A.; Bertini,Reinaldo J..
The Alcântara Formation, an important stratigraphic unit from the early Cenomanian of Brazil, was deposited under transitional (estuarine) conditions, and its fossil record includes fragmentary remains of plants, fishes, crocodylomorphs, pterosaurs and dinosaurs, with a noteworthy diversity of dipnoiformes tooth plates. The dipnoiformes material reported here comprises a new taxon, Equinoxiodus alcantarensis, gen. et sp. nov. Most of the identified morphotypes of continental vertebrates collected in the Alcântara Formation are similar to chronocorrelative faunas from Northern Africa, but this new genus of Dipnoiformes indicates some degree of paleogeographic isolation and endemism. This was probably caused by the widening of the equatorial Atlantic Ocean...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dipnoiformes; Neoceratodontids; Equinoxiodus alcantarensis gen. et sp. nov.; Cretaceous.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000400006
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A new titanosaur sauropod from the Atacama Desert, Chile Anais da ABC (AABC)
Kellner,Alexander W.A.; Rubilar-Rogers,David; Vargas,Alexander; Suárez,Mario.
Partial remains of a titanosaur sauropod collected in the Tolar Formation (Upper Cretaceous) at the Atacama Desert (Antofagasta Region), northern Chile, is described, and a new species, Atacamatitan chilensis gen. et sp. nov., is erected. The material consists mainly of dorsal and caudal vertebrae, part of a humerus and a femur. The presence of a titanosaur confirms the Cretaceous age for the outcrops of red sandstone of the Tolar Formation whose age was previously uncertain, ranging from the Upper Cretaceous to the Paleocene. The new specimen represents the most complete dinosaur reported for this region and one of the most complete titanosaur known from Chile and the pacific margin of South America so far.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dinosauria; Titanosauria; Atacamatitan; Atacama Desert; Cretaceous.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000100011
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A new toothless pterosaur (Pterodactyloidea) from Southern Brazil with insights into the paleoecology of a Cretaceous desert Anais da ABC (AABC)
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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Angolatitan adamastor, a new sauropod dinosaur and the first record from Angola Anais da ABC (AABC)
Mateus,Octávio; Jacobs,Louis L.; Schulp,Anne S.; Polcyn,Michael J.; Tavares,Tatiana S.; Buta Neto,André; Morais,Maria Luísa; Antunes,Miguel T..
A forelimb of a new sauropod dinosaur (Angolatitan adamastor n. gen. et sp.) from the Late Turonian of Iembe (Bengo Province) represents the first dinosaur discovery in Angola, and is one of the few occurrences of sauropod dinosaurs in sub-Saharan Africa collected with good chronological controls. The marginal marine sediments yielding the specimen are reported to be late Turonian in age and, thus it represents a non-titanosaurian sauropod in sub-Saharan Africa at a time taken to be dominated by titanosaurian forms. Moreover, Angolatitan adamastor is the only basal Somphospondyli known in the Late Cretaceous which implies in the existence of relict forms in Africa.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Angola; Cretaceous; Turonian; Dinosaurs; Sauropoda; Angolatitan.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000100012
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Araçatuba Formation: palustrine deposits from the initial sedimentation phase of the Bauru Basin Anais da ABC (AABC)
Fernandes,Luiz A.; Giannini,Paulo C. F.; Góes,Ana Maria.
The Bauru Basin (Upper Cretaceous) accumulated an essentially sandy continental sedimentary sequence. In a first desertic phase the basaltic substratum was covered by a widespread and homogeneous aeolian sand unit with minor loess intercalations. The substratum relief favored the formation of an endorheic drainage system under semi-arid climate, a process that started the development of the Araçatuba Paleoswamp. The palustrine deposits (Araçatuba Formation) comprise siltstone and tipically greenish gray narrow tabular strata of sandstone cemented by carbonate. Moulds and gypsite and dolomite pseudomorphs were identified. The moulds seem to be genetically associated with desiccation cracks, root marks and climbing ripple lamination levels, that, on the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Araçatuba; Cretaceous; Bauru; Swamp; Palustrine; Continental.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652003000200006
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Belemnitellid coleoids (Mollusca, Cephalopoda) from the type Maastrichtian, the Netherlands and Belgium Naturalis
Jagt, J.W.M..
Belemnitellid coleoids abound at some levels within the Gulpen and Maastricht formations in the study area, and ‘belemnite graveyards’ have long been known from the Bovenste Bos (Epen) and Slenaken-Beutenaken areas in southern Limburg, the Netherlands. Recent studies have demonstrated the presence of at least three species of the genus Belemnitella d’Orbigny, 1840, and five of Belemnella Nowak, 1913, and its subgenera Belemnella, Pachybelemnella Schulz, 1979, and Neobelemnella Naidin, 1975. Representatives of Belemnitella junior Nowak, 1913, and Belemnella (Neobelemnella) gr. kazimiroviensis (Skołozdrówna, 1932) are the only coleoids to reach the Cretaceous-Paleogene (K/Pg) boundary, and members of the latter group may even have persisted into the earliest...
Tipo: Article / Letter to the editor Palavras-chave: Mollusca; Coleoides; Belemnitellidae; Cretaceous; Maastrichtian; Type area; 38.22; 42.73.
Ano: 2012 URL: http://www.repository.naturalis.nl/record/428931
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Cretaceous and Cenozoic decapod crustaceans of Jamaica Naturalis
Donovan, Stephen K.; Portell, Roger W.; Collins, Joe S.H..
In the last decade, a rebirth in interest of Jamaican fossil crustaceans has occurred. A summary of known material is provided together with some indications of the directions that future studies should take.
Tipo: Article / Letter to the editor Palavras-chave: Jamaica; Cretaceous; Cenozoic; Crustacea; Decapoda.
Ano: 2003 URL: http://www.repository.naturalis.nl/record/534331
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Cretaceous Bryozoa from the Campanian and Maastrichtian of the Atlantic and Gulf Coastal Plains, United States Naturalis
Taylor, P.D.; McKinney, F.K..
The Late Cretaceous bryozoan fauna of North America has been severely neglected in the past. In this preliminary study based on museum material and a limited amount of fieldwork, we describe a total of 128 Campanian-Maastrichtian bryozoan species from Delaware, New Jersey, North Carolina, South Carolina, Tennessee, Georgia, Alabama, Mississippi, Louisiana and Arkansas. Eighty-two of these species are new, as are five (Basslerinella, Pseudoallantopora, Kristerina, Turnerella and Peedeesella) of the 77 genera. One new family, Peedeesellidae, is proposed. Cheilostomes, with 94 species (73 per cent of the total), outnumber cyclostomes, with 34 species (27 percent), a pattern matching that seen elsewhere in the world in coeval deposits. There appear to be very...
Tipo: Article / Letter to the editor Palavras-chave: Bryozoa; Cretaceous; U.S.A.; Taxonomy; 38.22; 42.72.
Ano: 2006 URL: http://www.repository.naturalis.nl/record/209694
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Crustáceos (Decapoda: Brachyura) fósiles de Cuba. OceanDocs
Varela, C.; Rojas-Consuegra, R..
Three families, two genera and two species are recorded for the first time for the Cuban Cretaceous to Pleistocene geologic age. The genera Persephona Leach, 1817 (Leucosiidae), Mithrax Desmarest, 1823 (Majidae) and Panopeus Milne Edwards, 1834 (Panopeidae) are well known in the Recent of the Caribbean region. Fossils of these taxa are found in formations from lower Miocene to upper Pleistocene in age in the Caribbean. Portunus oblongus Rathbun, 1920, an extinct species, is the first species of Portunus Weber, 1795 recorded from Cuban Oligocene–Miocene. Lophoranina precocious Feldmann, Vega, Tucker, García-Barrera y Avendaño, 1996 (Raninidae), other extinct species, is also recorded for the Cretaceous (Campanian- Maastrichtian). This is the most ancient...
Tipo: Journal Contribution Palavras-chave: Cretaceous; Oligocene; Miocene; Pleistocene.
Ano: 2009 URL: http://hdl.handle.net/1834/3408
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Dentaliids (Mollusca, Scaphopoda) from the type Maastrichtian, the Netherlands and Belgium Naturalis
Donovan, S.K.; Jagt, J.W.M..
Scaphopods remain poorly known from the type area of the Maastrichtian Stage in northeast Belgium and the southeast Netherlands. At least three species appear to be represented, but incomplete preservation (i.e., lack of shell material) hampers a detailed systematic treatment of most specimens. In museum collections, the name Dentalium nysti Binkhorst van den Binkhorst, 1861 (= D. binkhorsti Pilsbry & Sharp, 1898; non D. nysti d’Orbigny, 1852) is often used rather indiscriminately for both genuine scaphopods and internal moulds of serpulid worm tubes. Here, we describe and illustrate Antalis? binkhorsti, Fissidentalium? sp. 1 and Dentaliidae sp. indet., all of Maastrichtian age, as well as a late Campanian form, Fissidentalium? sp. 2.
Tipo: Article / Letter to the editor Palavras-chave: Cretaceous; Antalis; Fissidentalium; Serpulids; Systematics; 38.22; 42.73.
Ano: 2012 URL: http://www.repository.naturalis.nl/record/428929
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Early Cretaceous arthropods from plattenkalk facies in Mexico Naturalis
Vega, Francisco J.; Garcia-Barrera, P.; Coutiño, M.; Nyborg, T.; Cifuentes-Ruiz, P.; González-Rodríguez, K.; Martens, A.; Delgado, C.R.; Carbot, G..
Several well-preserved arthropod faunas have been studied in Mexico during the past few years. The purpose of the present note is to outline advances in the study of these arthropods and of their paleoenvironmental implications, from four localities. The age for these localities ranges from the Early to the Late Cretaceous. At most of these localities lithographic limestones crop out, with fish remains representing the most attractive element of study. However, arthropods constitute a very important tool for reconstructing paleoenvironment (marine crustaceans, freshwater and terrestrial insects and arachnids). Detailed studies of these assemblages will aid in our understanding of ancient coastal dynamics and the paleoecology of these unique environments.
Tipo: Article / Letter to the editor Palavras-chave: Cretaceous; Plattenkalk; Arthropoda; Mexico.
Ano: 2003 URL: http://www.repository.naturalis.nl/record/534392
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Early Cretaceous decapod Crustacea from the Neuquén Basin, west-central Argentina Naturalis
Aguirre-Urreta, Maria Beatriz.
Marine deposits of the Neuquén Basin of west-central Argentina (southern South America) are richly fossiliferous; its Mesozoic invertebrate faunas, represented mostly by molluscs, have been extensively studied since the nineteenth century. However, Early Cretaceous decapod crustaceans are far less known, although part of the systematic framework has been published (Aguirre-Urreta, 1989). The aim of the present note is to provide updated information based on ongoing research into the systematics and taphonomy of this crustacean group in the Neuquén Basin.
Tipo: Article / Letter to the editor Palavras-chave: Crustacea; Decapoda; Cretaceous; Argentina.
Ano: 2003 URL: http://www.repository.naturalis.nl/record/534372
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Evolution of neodymium isotopic signature of seawater during the Late Cretaceous: Implications for intermediate and deep circulation ArchiMer
Moiroud, Mathieu; Puceat, Emmanuelle; Donnadieu, Yannick; Bayon, Germain; Guiraud, Michel; Voigt, Silke; Deconinck, Jean-francois; Monna, Fabrice.
Neodymium isotopic compositions (εNd) have been largely used for the last fifty years as a tracer of past ocean circulation, and more intensively during the last decade to investigate ocean circulation during the Cretaceous period. Despite a growing set of data, circulation patterns still remain unclear during this period. In particular, the identification of the deep-water masses and their spatial extension within the different oceanic basins are poorly constrained. In this study we present new deep-water εNd data inferred from the Nd isotope composition of fish remains and Fe-Mn oxyhydroxide coatings on foraminifera tests, along with new εNd data of residual (partly detrital) fraction recovered from DSDP sites 152 (Nicaraguan Rise), 258 (Naturaliste...
Tipo: Text Palavras-chave: Cretaceous; Neodymium isotopes; Ocean circulation; Southern Ocean.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00278/38962/37502.pdf
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Evolution of the Austral-Antarctic flora during the Cretaceous: New insights from a paleobiogeographic perspective RChHN
LEPPE,MARCELO; MIHOC,MARITZA; VARELA,NATALIA; STINNESBECK,WOLFGANG; MANSILLA,HÉCTOR; BIERMA,HESSEL; CISTERNA,KATHERINE; FREY,EBERHARD; JUJIHARA,TOSHIRO.
Forest environments have continuously existed in Antarctica since the late Paleozoic and only disappeared from this continent since the Neogene. Nevertheless, the structure of these forests underwent substantial evolutionary changes. During the late Cretaceous, forests dominated by conifers and pteridophytes were gradually replaced by angiosperm-dominated forests. Elements common to these Antarctic forests are important constituents of the recent Valdivian Forest. During the Turonian stage of the Late Cretaceous, the Antarctic Peninsula and Patagonia were reconnected by a land bridge after a separation since the end of the Jurassic. Using biogeographic tools applied to the palynological and leaf imprint record, outcrops of Campanian-Maastrichtian age were...
Tipo: Journal article Palavras-chave: Antarctica; Cretaceous; Magellan's basin; Paleobotany; Patagonia.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2012000400002
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First record of Calappoidea and Dromioidea from the Upper Cretaceous (Upper Maastrichtian) of NW Madagascar Naturalis
Garassino, Alessandro; Pasini, Giovanni.
The crustaceans from the marine Berivotra Formation, dated as late Cretaceous, from 50 km south of Mahajanga, Madagascar contains macrurans, brachyurans and thalassinideans. Two brachyuran families, Raninidae and Dynomenidae, were previously identified with the genera Notopocorystes, Caloxanthus, Titanocarcinus, Xanthosia, and Dromiopsis. Fragmentary material now also allows the recognition of Dromioidea, Calappoidea and Xanthoidea.
Tipo: Article / Letter to the editor Palavras-chave: Crustacea; Decapoda; Cretaceous; Madagascar.
Ano: 2003 URL: http://www.repository.naturalis.nl/record/534294
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Fossils of the type Maastrichtian Naturalis
Jagt, J.W.M.; Donovan, S.K.; Jagt-Yazykova, E.A..
The south-western Indian Ocean islands, excluding the microcontinent of Madagascar, are geologically complex and diverse. They have been subject to drastic sea level changes, volcanic events and anthropogenic changes, all of which have contributed to confuse understanding of their avian biogeography. An array of factors have affected these avifaunas, based on palaeontological, historical and molecular evidence,which together have shown that avian biogeography is not congruent with the relative age and size of the islands.
Tipo: Article / Letter to the editor Palavras-chave: Macrofossils; Cretaceous; Maastrichtian; Mesozoic; Geology; Palaeontology; 38.20; 38.22.
Ano: 2012 URL: http://www.repository.naturalis.nl/record/428551
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Intraspecific and intrageneric variabilities and their implication for the systematics of Cretaceous heteromorph ammonites; a review Naturalis
Kakabadze, M.V..
The variability in the dimensions of the shell, and some changes in suture line, sculpture, whorl section and mode of coiling in the late ontogenetic stages, have in some cases no taxonomic significance for the recognition of genera and higher taxa of Cretaceous heteromorph ammonites. In many cases, such phenomena are due to intraspecific variation or variation within a genus. The intrageneric variations of some Cretaceous heteromorphs are discussed in detail in the light of new, rich Colombian material. In relation to these problems in systematics, some questions on the systematics of the superfamily Ancyloceratoidea Gill are considered.
Tipo: Article / Letter to the editor Palavras-chave: Ammonites; Heteromorphs; Dimorphism; Systematics; Cretaceous; 38.22; 42.73.
Ano: 2004 URL: http://www.repository.naturalis.nl/record/214457
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Late Cretaceous dwarf decapods from Guerrero, southern Mexico and their migration patterns Naturalis
Fraaije, R.H.B.; Vega, F.J.; Bakel, B.W.M. van; Garibay-Romero, L.M..
Two new brachyuran species are described for the Upper Cretaceous Mexcala Formation, Guerrero State, Mexico. Longusorbis quadratus new species (Coniacian, Temalac region) is the oldest and southernmost record for the genus. Xanthosia zoquiapensis new species (Campanian, Zoquiapa region) is the first record for the genus in Mexico. In addition, the age for Costacopluma bishopi Vega and Feldmann is discussed (Coniacian, Temalac region) and represents the oldest and southernmost record for Cretaceous representatives of this genus in North America. All specimens are considerably smaller compared to other species of the same genera and are interpreted as the first example of brachyuran dwarfism in the geological record. These species add new insight into...
Tipo: Article / Letter to the editor Palavras-chave: Dwarfism; Decapoda; Cretaceous; New species; Mexico; 38.22; 42.74.
Ano: 2006 URL: http://www.repository.naturalis.nl/record/214533
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Late Cretaceous stomatopods (Crustacea, Malacostraca) from Israel and Jordan Naturalis
Hof, Cees H.J..
The eryonid decapod Eryon yehoachi Remy & Avnimelech, 1955, from the Late Cretaceous of Israel, is redescribed as a fossil stomatopod species within the new genus Ursquilla. This redescription is based on the original type specimen and two additional records from Israel and Jordan. The material allows a detailed reconstruction of the telson, the sixth abdominal tergite, and part of the uropods. The distinct telson ornamentation of these stomatopods justifies the erection of a new family within the superfamily Squilloidea.
Tipo: Article / Letter to the editor Palavras-chave: Stomatopoda; Mesozoic; Cretaceous; Fossils; Taphonomy; Squilloidea; New family Ursquillidae; Taxonomy; New genus; Ursquilla.
Ano: 1998 URL: http://www.repository.naturalis.nl/record/534307
Registros recuperados: 39
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