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Registros recuperados: 11 | |
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Vasícek, Z.. |
New records of heteromorph ammonites from the Silesian Unit of the Outer Western Carpathians (Czech Republic) are represented especially by small pyrite steinkerns with suture lines preserved. A lesser proportion of them belongs to representatives of the subfamily Bochianitidae from the Valanginian. Among the most interesting is Baculina rouyana d’Orbigny. Another group consists primarily of lower Barremian Leptoceratoidinae. In addition to commonly occurring species of Hamulinites and Leptoceratoides, an Eoheteroceras assemblage is often found, represented partially by new elements. Heteromorphs from the Northern Calcareous Alps (Austria) come from marly Hauterivian limestones. Ptychoceras meyrati is present through most of the Hauterivian. Well-dated... |
Tipo: Article / Letter to the editor |
Palavras-chave: Heteromorph ammonites; Lower Cretaceous; Silesian Unit; Reichraming Nappe; 38.22; 42.73. |
Ano: 1999 |
URL: http://www.repository.naturalis.nl/record/216202 |
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Rawson, P.F.; Hoedemaeker, P.J.. |
The Working Group proposes only one modification to its current zonation of the Mediterranean Region, the addition of a cristatum Subzone in the lower part of the inflatum Zone (upper Albian). But in the light of newly published research it highlights levels/areas where further work is required, especially to resolve conflicting zonal schemes. It also proposes a ‘Tethyan Province’ zonation for the middle Albian. Alternative correlations for the Boreal/Tethyan Valanginian to Barremian stages are tabulated, one based on ammonite evidence alone, the other with additional biostratigraphical data coupled with sequence stratigraphy and magnetostratigraphy. |
Tipo: Article / Letter to the editor |
Palavras-chave: Ammonites; Correlation; Lower Cretaceous; 38.16. |
Ano: 1999 |
URL: http://www.repository.naturalis.nl/record/216193 |
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Veldmeijer, A.J.. |
A new species of pterosaur, Coloborhynchus spielbergi sp. nov. (Pterodactyloidea), from the Romualdo Member (Albian) of the Santana Formation is described. The type consists of the skull, mandible and many of the post-cranial bones. The specimen displays a high degree of co-ossification indicating that the animal was an adult and likely quite old when it died. The wingspan is reconstructed at nearly 6 m. Among the characteristic features are a large anteriorly positioned premaxillary sagittal crest and a smaller, also anteriorly positioned dentary sagittal crest, a flat anterior aspect of the skull from which two teeth project and a ventrally fused pelvis. Comments on Brazilian pterosaurs are made in connection with the classificiation of the Leiden... |
Tipo: Article / Letter to the editor |
Palavras-chave: Pterosaur; Coloborhynchus; Santana Formation; Lower Cretaceous; Brazil; 42.82; 38.22. |
Ano: 2003 |
URL: http://www.repository.naturalis.nl/record/219236 |
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Waveren, I.M. van; Konijnenburg-van Cittert, J.H.A. van; Burgh, J. van den; Dilcher, D.L.. |
Lower Cretaceous plant fossils are described systematically from marine deposits near Villa de Leiva (Boyaca region, Colombia). Specimens originating from the same localities kept at the Florida Museum of Natural History (Gainesville) were included in the systematic description. The plant fossils belong to the Pteridophyta, the Cycadophyta, the Coniferophyta, and to taxa of uncertain affinity which, following previous authors, are referred to the angiosperms. Two new species of Coniferophyta are described, viz. Cupressinocladus hoedemaekeri sp. nov. and Brachyphyllum winklerprinsii sp. nov. Also, Thuites sutamarchensis Huertas is transferred to the genus Cupressinocladus. Fossil plants, Lower Cretaceous, Leiva Region, Colombia. |
Tipo: Article / Letter to the editor |
Palavras-chave: Fossil plants; Lower Cretaceous; Leiva Region; Colombia; 38.21. |
Ano: 2002 |
URL: http://www.repository.naturalis.nl/record/219174 |
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Azevedo,Celso O.; Azar,Dany. |
A new subfamily, a new genus and a new species of Bethylidae are described and illustrated from a single individual in Early Cretaceous amber from central Lebanon. Lancepyrinae subfam. nov. represented by Lancepyris opertus gen. and sp. nov. present a mosaic of features common among several bethylid subfamilies. The new taxon is easily distinguished from related taxa mainly by the forewing venation, which has an unusual combination of closed lanceolate marginal cell, Rs+M tubular and well pigmented and M+RS angled. Phylogenetic analysis including indicates that Lancepyris opertus gen. and sp. nov. is a sister group of all subfamilies that have Coleoptera as hosts. A checklist of the 45 known fossil bethylid species is provided. |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lancepyris; Lower Cretaceous; Mesozoic; New genus; New species. |
Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702012000300004 |
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Kellner,Alexander W.A.; Aguirre-Urreta,María B.; Ramos,Victor A.. |
Pterosaur remains from the Río Belgrano Formation, Santa Cruz Province, Argentina, were found close to the Estancia Río Roble, along with several ammonoids that indicate a Barremian age for those strata. The specimens (MACN-SC 3617) consist of one ulna and one element tentatively identified as a portion of a wing metacarpal. The ulna shows morphological affinities with the Pteranodontoidea (sensu Kellner 1996), particularly with the members of the Anhangueridae by having a well developed ventral crest close to the proximal articulation, and is tentatively referred to this pterosaur clade. The oldest record of the Anhangueridae, previously limited to the Aptian/Albian, is therefore extended to the Barremian. The Argentinean material is preserved in three... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pterosauria; Río Belgrano Formation; Lower Cretaceous; Argentina. |
Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652003000400007 |
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Registros recuperados: 11 | |
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