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| Registros recuperados: 20 | |
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| Gruet, Y; Sauriau, P. |
| Four cores have been sampled in the "Marais Poitevin": one of them in the east of Charron, another one near Pied-Lizet and the others near Maillezais. Pieces of shells of different species have been numbered and weighed. Ranks frequencies diagrams show the malacological associations homogeneity and diversity. The factorial analysis on the absences-presences makes clear an ecological gradient from the most marine associations to the most superficial and finally land associations. |
| Tipo: Text |
Palavras-chave: Fossils; Marshes; Malacology. |
| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/1991/acte-1760.pdf |
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| Ericson, P.G.P.. |
| The paper summarizes the current understanding of the evolution and diversification of birds. New insights into this field have mainly come from two fundamentally different, but complementary sources of information: the many newly discovered Mesozoic bird fossils and the wealth of genetic analyses of living birds at various taxonomic levels. The birds have evolved from theropod dinosaurs from which they can be defined by but a few morphological characters. The early evolutionary history of the group is characterized by the extinctions of many major clades by the end of the Cretaceous, and by several periods of rapid radiations and speciation. Recent years have seen a growing consensus about the higher- level relationships among living birds, at least as... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Aves; Phylogeny; Systematics; Fossils; DNA; Genetics; Biogeography; 42.83. |
| Ano: 2008 |
URL: http://www.repository.naturalis.nl/record/280479 |
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| Edgecombe, Gregory D.. |
| The status of Myriapoda (whether mono-, para- or polyphyletic) and position of myriapods in the Arthropoda are controversial, an impediment to evaluating fossils that may be members of the myriapod stem-group. Parsimony analysis of 319 characters for extant arthropods provides a basis for defending myriapod monophyly and identifying those morphological characters that are necessary to assign a fossil taxon to the Myriapoda. The alliance of hexapods and crustaceans need not relegate myriapods to the arthropod stem-group; the Mandibulata hypothesis accommodates Myriapoda and Tetraconata as sister taxa. No known pre-Silurian fossils have characters that convincingly place them in the Myriapoda or the myriapod stem-group. Because the strongest apomorphies of... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Myriapoda; Phylogeny; Stem-group; Fossils. |
| Ano: 2004 |
URL: http://www.repository.naturalis.nl/record/534390 |
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| Hume, J.P.; Prys-Jones, R.P.. |
| The faunal history of the Mascarene Islands (Mauritius, Réunion and Rodrigues) has been extensively documented, with most information being derived from the fossil record, museum skins, the journals and logbooks of early mariners and contemporary illustrations. However, our research on original sources, including Dutch journals held at The Hague, and archival correspondence and fossil collections, notably at The Natural History Museum, London, and the University Museum of Zoology, Cambridge, indicates that many problems remain to be resolved. This situation has been exacerbated by exchange schemes amongst museums, personal rivalries, misidentification, lack of comparative material, and inadequate provenance of specimens; furthermore, problematic and... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Mascarene Islands; Extinct birds; Iconographical evidence; Journals; Diaries; Museum specimens; Fossils; Loans and exchanges; 42.83. |
| Ano: 2005 |
URL: http://www.repository.naturalis.nl/record/210798 |
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| Lee, Michael S.Y.. |
| The morphological and molecular evidence for higher-level reptile relationships is reassessed, A combined analysis of 176 osteological, 40 soft anatomical, and 2903 (1783 aligned) molecular characters in 28 amniote taxa yields the traditional reptile tree. Synapsids (including mammals) are the sister taxon to all other amniotes, including all extant reptiles. Turtles group with anapsid parareptiles and fall outside a monophyletic Diapsida. Within diapsids, squamates and Sphenodon form a monophyletic Lepidosauria, and crocodiles plus birds form a monophyletic Archosauria. This tree is identical to the tree strongly supported by the osteological data alone when fossils are included. In a combined analysis the strong osteological signal linking turtles with... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Reptilia; Testudines; Cladistics; Osteology; Fossils; Molecular phylogenetics. |
| Ano: 2001 |
URL: http://www.repository.naturalis.nl/record/534306 |
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| Leppe, M.; Stinnesbeck, W.. |
| En Chile existen pocos vestigios de ictiosaurios en rocas jurásicas y cretácicas. Por lo anterior, la exploración paleontológica de las rocas próximas al glaciar Tyndall realizada por investigadores de INACH y la Universidad de Heidelberg, Alemania, en febrero de 2008, tenía muchas expectativas. El hallazgo no pudo satisfacer más las expectativas: decenas de esqueletos articulados, varios de ellos completos, pertenecientes al grupo de ictiosaurios platipterigios, es decir, el último grupo en desaparecer de la faz de la Tierra, hace unos 90 millones de años, a comienzos del Cretácico Superior. |
| Tipo: Journal Contribution |
Palavras-chave: Fossils; Aquatic reptiles; Fossils; Http://aims.fao.org/aos/agrovoc/c_10989. |
| Ano: 2008 |
URL: http://hdl.handle.net/1834/3374 |
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| Rojas Consuegra, R.; Varela, C.. |
| En la actualidad se posee un limitado conocimiento sobre los crustáceos fósiles de Cuba. En el presente trabajo se esboza el registro de los decápodos fósiles de diferentes edades en nuestro país. El registro más antiguo de decápodo para Cuba es Lophoranina precocious del Campaniano – Maastrichtiano (Fm. Cotorro); además, es conocida una quela del Maastrichtiano (Fm. Jimaguyú). El Mioceno Inferior ha dado en los últimos años el material fósil de decápodos más rico y diverso: Panopeus sp. y Persephona sp. (Fm. Lagunitas); Portunus oblongus, Necronectes sp., Iliacantha liodactylos, Hepathus sp., Raninoides sp. y Eriosachila sp. (Fm. Colón); y hay nuevo material en estudio. Del Plioceno se han reportado Euphylax dominguensis y Mithrax sp. (Mbro. El Abra, Fm.... |
| Tipo: Proceedings Paper |
Palavras-chave: 1243; Fossils; New records; Fossils. |
| Ano: 2011 |
URL: http://hdl.handle.net/1834/4060 |
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| Grégoire, Ch.. |
| Remnants of decalcified nacreous layers from Ordovician, Devonian, Carboneferous (including Pennsylvanian), Permian, Jurassic and Cretaceous, nautiloid and ammonoid shells, examined in the electron microscope, consists of various, biuret-positive structures, which reflect degrees in degradation of the original conchiolon sheets. Identification of these structures as altered nacreous concholin and discrimination from contaminating structures of foreign organisms, a frequent finding in fossil shells, were based on detection of similar structural modifications in the Recent <i>Nautilus</i> shell, in well preserved shells of Pennsylvanian and Mesozoic cephalopods and in alterations produced artificially in experimental diagenesis of the Recent... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fossils; Paleozoic; Cephalopoda. |
| Ano: 1966 |
URL: http://www.vliz.be/imisdocs/publications/289080.pdf |
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| Dhondt, A.. |
| The present paper contains a systematic revision of the genera <i>Entolium</i> and <i>Propeamussium</i> (Amusiidae) and <i>Syncyclonema</i> (Pectinidae, Bivalvia, Mollusca) in European Cretaceous boreal seas.In <i>Entolium</i> two species are described, in <i>Propeamussium</i> one, and in <i>Syncyclonema</i> eight of which one (<i>S. hagenowi</i>) is new to science, two (<i>S. gamsensis</i> and <i>S. haggi</i>) are renamed and a former variety is given specific status (<i>S. haldonensis</i>).Stress is laid on redefining the species, mostly along biological lines. Material has been studied from as many localities as possible; a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cretaceous; Fossils; Pectinidae [scallops]. |
| Ano: 1971 |
URL: http://www.vliz.be/imisdocs/publications/294770.pdf |
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| Registros recuperados: 20 | |
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