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Registros recuperados: 8
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A revised checklist of Nepticulidae fossils (Lepidoptera) indicates an Early Cretaceous origin Naturalis
Doorenweerd, C.; Nieukerken, E.J. van; Sohn, J.-C.; Labandeira, C.C..
With phylogenetic knowledge of Lepidoptera rapidly increasing, catalysed by increasingly powerful molecular techniques, the demand for fossil calibration points to estimate an evolutionary timeframe for the order is becoming an increasingly pressing issue. The family Nepticulidae is a species rich, basal branch within the phylogeny of the Lepidoptera, characterized by larval leaf-mining habits, and thereby represents a potentially important lineage whose evolutionary history can be established more thoroughly with the potential use of fossil calibration points. Using our experience with extant global Nepticulidae, we discuss a list of characters that may be used to assign fossil leaf mines to Nepticulidae, and suggest useful methods for classifying...
Tipo: Article / Letter to the editor Palavras-chave: Baltic amber; Calibration points; Dakota formation; Evolutionary history; Extinction; Fossil record; Larvae; Leaf mining; Plant hosts; Stigmella; Stigmellites.
Ano: 2015 URL: http://www.repository.naturalis.nl/record/648751
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Fossil evidence of the zygomycetous fungi Naturalis
Krings, M.; Taylor, T.N.; Dotzler, N..
Molecular clock data indicate that the first zygomycetous fungi occurred on Earth during the Precambrian, however, fossil evidence of these organisms has been slow to accumulate. In this paper, the fossil record of the zygomycetous fungi is compiled, with a focus on structurally preserved Carboniferous and Triassic fossils interpreted as zygosporangium-gametangia complexes and resembling those of modern Endogonales. Enigmatic microfossils from the Precambrian to Cenozoic that have variously been interpreted as, or compared to, zygomycetous fungi are also discussed. Among these, the spherical structures collectively termed ‘sporocarps’ are especially interesting because of their complex investments and abundance in certain Carboniferous and Triassic rocks....
Tipo: Article / Letter to the editor Palavras-chave: Endogonales; Fossil record; Morphology; Reproductive biology; Sporocarp; Zygosporangium-gametangia complex.
Ano: 2013 URL: http://www.repository.naturalis.nl/record/532004
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New studies of decapod crustaceans from the Upper Jurassic lithographic limestones of southern Germany Naturalis
Schweigert, Günter; Garassino, Alessandro.
The Upper Jurassic lithographic limestones of southern Germany have long been known for their exceptional preservation of decapod crustaceans (Glaessner, 1965), similar to the Upper Cretaceous of Lebanon (Hakel, Hadjoula) and the still poorly known Callovian strata at La Voulte-sur-Rhône (France). In these non-bioturbated limestones, the decay of decapod skeletons is reduced, so that besides the heavily mineralized chelae and carapace often even delicate structures such as pleopods and antennae are preserved. Recently, new decapod material has been obtained from both scientific and commercial excavations, in part in reopened lithographic limestone quarries.
Tipo: Article / Letter to the editor Palavras-chave: Crustacea; Decapoda; Lithographic limestones; Upper Jurassic; Solnhofen; Fossil record; Diversity.
Ano: 2003 URL: http://www.repository.naturalis.nl/record/534281
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Paleobiogeography and taxonomy of the genus Concholepas (Lamarck, 1801): a review and new evidences RChHN
CÁRDENAS,LEYLA; VIARD,FRÉDÉRIQUE; CASTILLA,JUAN CARLOS.
The muricid gastropod Concholepas concholepas, known in Chile as 'loco', is an important component of intertidal and shallow subtidal communities, and is one of the main invertebrates targeted by small-scale fishers (divers) in Chile. Because of its ecological importance and economical value, numerous studies have been conducted to describe its life history, ecology and to understand population dynamics, fishery and management. However, little effort has been done to address the causal factor (s) behind its current geographic distribution and moreover little is known about the past distribution of the different species in the genus. In this paper, first we review the paleobiogeography, historical relationships, taxonomy and geographical distribution of...
Tipo: Journal article Palavras-chave: Paleobiogeography; Southeastern Pacific coast; Concholepas; Fossil record; Taxonomy; MtDNA variation.
Ano: 2008 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2008000300010
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Pollen of Southeast Asian Alchornea (Euphorbiaceae), with an overview of the pollen fossil record Naturalis
Bulalacao, L.J.; Ham, R.W.J.M. van der.
In order to evaluate pollen morphological descriptions of Alchornea in the literature, which are almost completely based on African and American species, the pollen of eight Southeast Asian species of Alchornea was investigated, using light and scanning electron microscopy. Very little variation appeared to be present in the Asian material. Slightly deviating from the scabrate ornamentation type are A. kelungensis (psilate) and A. rugosa (striate-rugulate). The scabrate type is also found in A. castaneaefolia (Brazil), A. hirtella (Liberia) and A. obovata (Colombia). The operculate Alchornea pollen type, which can be easily recognised using light microscopy, seems to represent a diagnostic character for the tribe Alchornieae (pollen of Bossera unknown)....
Tipo: Article / Letter to the editor Palavras-chave: Alchornea; Euphorbiaceae; Fossil record; Pollen; SE Asia.
Ano: 2003 URL: http://www.repository.naturalis.nl/record/525434
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Preservation biases, rates of evolution and coherence of databases: Bivalvia as a study case Ameghiniana
Ros,Sonia; de Renzi,Miquel.
Several hypotheses about the influence of preservation on Bivalvia rates of evolution estimates (marine and freshwater families) were tested in a previous paper. However, the database used for those tests had a patchy quality and our results were provisional. Now an improved database dealing with only marine families has been used in order to test again those hypotheses. We removed freshwater families from the early database and we test the statistical hypotheses on these two data sources. Diversification patterns remain stable in general with these different databases; however, only the improved database shows the mass extinction at the end of the Triassic times. Statistical conclusions in the previous paper are generally confirmed in the present study....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Databases; Fossil record; Preservation biases; Bivalves; Rates of evolution.
Ano: 2005 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142005000300003
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Taxonomy, Phylogeny and Biogeography of Mushroom Corals (Scleractinia: Fungiidae) Naturalis
Hoeksema, B.W..
The Fungiidae are mushroom corals that live in sublittoral habitats in the tropical Indo-Pacific. Their habitats are part of coral reefs or other marine substrata, which usually can be found in the proximity of the reefs. In the present taxonomic revision, the family is divided into 11 genera; one of which, Fungia, is subdivided into seven subgenera. A total of 40 species is described and figured, three of which are new to science. One species is renamed. The stratigraphic distribution is given for all the species recorded in fossil state. A tentative phylogenetic reconstruction down to the species level is given. The cladogram that is provided should be considered a working hypothesis and not a sound basis for a completely revised classification and...
Tipo: Article / Letter to the editor Palavras-chave: Scleractinia; Fungiidae; Mushroom corals; Taxonomy; Revision; Fossil record; Phy- logeny; Biogeography; Indo-Pacific; Tropical; Marine; Benthic; Shallow-water habitats; Coral reefs; Species diversity.; 42.72.
Ano: 1989 URL: http://www.repository.naturalis.nl/record/317727
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Testing cladograms by fossil record: the ghost range test Naturalis
Rasnitsyn, Alexandr P..
A method of the ghost range calculation is proposed to assess the congruence between a cladogram and the fossil record and to compare cladograms on this basis. The method is tested on a set of cladograms developed recently to reveal the phylogeny of the hymenopterous insects (Order Vespida), and the results are discussed.
Tipo: Article / Letter to the editor Palavras-chave: Phylogeny; Cladogram; Ghost range; Fossil record; Vespida; Hymenoptera.
Ano: 2000 URL: http://www.repository.naturalis.nl/record/534288
Registros recuperados: 8
Primeira ... 1 ... Última
 

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