Consulta: subjectFacets:"38.20"
Registros recuperados: 29
Data/hora: 13/06/2024 05:14:42

The evolution of fossil ecosystems
Provedor de dados: 16
Autores: Schram, F.R.
Tipo: Book review
Palavras-chave: Evolution; Fossil ecosystems; Book review; 38.20.
Ano: 2005
URL: http://www.repository.naturalis.nl/record/214351

The Tegelen clay-pits: a hundred year old classical locality
Provedor de dados: 16
Autores: Hoek Ostende, L.W. van den.
Having been described in 1904 by Dubois as a locality for fossil mammals, the Tegelen clay-pits are nowadays considered a ‘classical’ locality. It is the type locality of the Tiglian, a warm period of the Early Pleistocene or Late Pliocene. The pits are primarily known for their mammalian remains, but have also yielded seeds, pollen and freshwater snails. A century of collecting has resulted in extensive collections of large mammals in various museums, the most important of which are the Teylers Museum, Haarlem and the National Museum of Natural History Naturalis in Leiden. The latter museum also holds a large collection of microvertebrates, collected during campaigns in the 1970s. These campaigns showed that, in spite of the numerous fossils, the Tegelen...
Tipo: Article / Letter to the editor
Palavras-chave: Tegelen; Tiglian; Pleistocene; Fossil mammals; 38.20.
Ano: 2004
URL: http://www.repository.naturalis.nl/record/215458

[Proceedings of the VII international symposium 'Cultural heritage in geosciences, mining and metallurgy : libraries, archives, museums' : "Museums and their collections" held at the Nationaal Natuurhistorisch Museum Leiden (The Netherlands), 19-23 May, 2003 / Cor F. Winkler Prins and Stephen K. Donovan (editors)]: Palaeontological collections at the Geological Museum, University of Copenhagen: from Cabinet of Curiosities to databases
Provedor de dados: 16
Autores: Harper, D.A.T.
Geological collections were established in the University of Copenhagen during the early 1700s with the presentation of fossil, mineral and rock collections by Count A.G. Moltke, mainly assembled by Ole Worm (1588-1654) in his Museum Wormianum. Currently the palaeontological collections in the Geological Museum, alone, contain over 1 million specimens, including 26,000 types. The focus of the collection remains on material from Denmark and Greenland. Highlights from Greenland include evidence of early life from the Archaean Isua Complex, the early Cambrian Sirius Passet fauna, Devonian amphibians, Triassic dinosaurs, mammals and pterosaurs, Jurassic and Cretaceous ammonites together with Jurassic and Cretaceous plants. The Danish collections are dominated...
Tipo: Article / Letter to the editor
Palavras-chave: 38.20.
Ano: 2004
URL: http://www.repository.naturalis.nl/record/317353

Some remarks on Miogypsina (Miogypsina) socini Drooger, 1954 (Foraminifera) from northern Italy
Provedor de dados: 16
Autores: Bock, J.F. de.
In spite of the generally poor preservation of the specimens, it could be observed that in many specimens the large, often somewhat trochoid spiral out of PA-I, surrounding I and II, passes the small spiral out of PA-II without forming a closing chamber. In several specimens the vertical section shows that the embryonic-nepionic apparatus forms an angle with the equatorial plane. This makes it difficult to distinguish in a horizontal thin section a spiral chamber from an equatorial or lateral chamber. The sample used contained numerous microspheric specimens, which are markedly different from the megalospheric specimens both externally and internally. The difference between the subgenera Miogypsina and Miolepidocyclina is discussed.
Tipo: Article / Letter to the editor
Palavras-chave: 38.20.
Ano: 1977
URL: http://www.repository.naturalis.nl/record/317497

Larger Foraminifera from the Spermonde Archipelago (Sulawesi, Indonesia)
Provedor de dados: 16
Autores: Troelstra, S.R.; Jonkers, H.M.; Rijk, S. de.
A systematic description of the distributional patterns of larger symbiont-bearing benthic Foraminifera from the Spermonde Archipelago (Sulawesi, Indonesia) and their relation with local coral reef growth is presented. The larger Foraminiferal assemblages and diversity indices correspond with the diversity of Scleractinia and marine plants on the Spermonde platform. Our results indicate that the group is an excellent biomonitor for the health condition of recent coral reefs and a valuable tool for paleo-environmental reconstructions.
Tipo: Article / Letter to the editor
Palavras-chave: 38.20.
Ano: 1996
URL: http://www.repository.naturalis.nl/record/317518

Trautschold’s collections in the Vernadsky State Geological Museum of the Russian Academy of Science (Moscow, Russia)
Provedor de dados: 16
Autores: Starodubtseva, I.A.
Hermann (German) Trautschold (1817-1902) is an outstanding researcher of the Carboniferous, Jurassic and Cretaceous geology of central Russia. Three decades (1857-1888) he lived in Moscow and moved from tutor and lecturer of the German language to Professor of Geology of Peter’s Agricultural University. All these years Trautschold was unceasing in palaeontological and stratigraphical researches.
Tipo: Article / Letter to the editor
Palavras-chave: G.A. Trautschold; Carboniferous; Jurassic; Cretaceous; Central Russia; Palaeontology; 38.20.
Ano: 2004
URL: http://www.repository.naturalis.nl/record/215470

Palaeozoic microfossils from Orphan Knoll, NW Atlantic Ocean
Provedor de dados: 16
Autores: Hinte, J.E. van; Ruffman, A.; Boogaard, M. van den; Jansonius, J.; Kempen, T.M.G. van; Melchin, M.J.; Miller, T.H.
Orphan Knoll is an isolated, drowned continental fragment 550 km northeast of Newfoundland. The top of Orphan Knoll stands at 1800 to 2000 m and is marked by a series of protruding mounds. Dredging at the base of one of the mounds in 1971 obtained a suite of fossiliferous limestone pebbles that are interpreted to reflect nearby bedrock. The shallow marine limestone facies include mudstone, wackestone, packstone, and grainstone. The pebbles yielded Late Ordovician, Silurian and Devonian conodonts, as well as Ordovician/Silurian scolecodonts, chitinozoans and graptolites. Similarly, sponge spicules suggest the presence of Late Ordovician as well as Middle Devonian material including a Silicunculus-type of hexactinellid anchoring basalia and an octactine...
Tipo: Article / Letter to the editor
Palavras-chave: 38.20.
Ano: 1995
URL: http://www.repository.naturalis.nl/record/317524

Preface: Early Cretaceous ammonites from Colombia
Provedor de dados: 16
Autores: Hoedemaeker, P.J.; Kakabadze, M.V.
Tipo: Article / Letter to the editor
Palavras-chave: Early Cretaceous; Ammonites; Colombia; 38.20; 42.73.
Ano: 2004
URL: http://www.repository.naturalis.nl/record/214455

Extant Rhabdosphaeraceae (coccolithophorids, class Prymnesiophyceae) from the Indian Ocean, Red Sea, Mediterranean Sea and North Atlantic Ocean
Provedor de dados: 16
Autores: Kleijne, A.
Rhabdosphaerids were consistently present as a minor constituent of the 1985 summer coccolithophorid flora in surface waters of the Indian Ocean, Red Sea, Mediterranean Sea and North Atlantic. Sixteen taxa are identified, belonging to seven genera, including the two new combinations Cyrtosphaera aculeata and C. cucullata and the new species C. lecaliae sp. nov. of Cyrtosphaera gen. nov., and the new combination Anacanthoica cidaris. An emended description is given for the genus Acanthoica, of which the new species A. biscayensis and a type in open nomenclature are described. All species are illustrated by SEM-micrographs and their occurrences are mapped. The most frequently occurring species were Palusphaera vandeli, present in low numbers along the entire...
Tipo: Article / Letter to the editor
Palavras-chave: 38.20.
Ano: 1992
URL: http://www.repository.naturalis.nl/record/317515

Morphology and phylogeny of pseudorbitoid foraminifera from Jamaica and Curaçao, a revisional study
Provedor de dados: 16
Autores: Krijnen, J.P.
In the present paper, certain morphological features and the ontogenetical development of members of the subfamily Pseudorbitoidinae Rutten, 1935 are discussed. A study of the evolution of Pseudorbitoides Douvillé, 1922 resulted in testing the concept of nepionic reduction in populations of this genus from Jamaica (Green Island- and Sunderland Inlier) and Curaçao (Cas Abao Limestone lenses). Within the Pseudorbitoides-lineage, P. trechmanni pectinata subsp. nov. is distinguished from P. trechmanni trechmanni Douvillé on account of different post-juvenile features.
Tipo: Article / Letter to the editor
Palavras-chave: 38.20.
Ano: 1972
URL: http://www.repository.naturalis.nl/record/317459

Islands: Palaeontology, Geology and Tectonics
Provedor de dados: 16
Autores: Donovan, S.K.
The intention of this Lyell Meeting is to bring together tectonicists, geologists, palaeontologists and geomorphologists to discuss the intersection of their specialisms in the geology of islands.
Tipo: Article / Letter to the editor
Palavras-chave: Lyell meetings; Islands; Geology; Palaeontology; Tectonics; Evolution; Isolation; 38.20; 38.37; 38.22.
Ano: 2011
URL: http://www.repository.naturalis.nl/record/428038

Secondary chamberlets in Cycloclypeus
Provedor de dados: 16
Autores: O'Herne, L.
Graphs, showing the relation of the primary chambers to the number of their secondary chamberlets, demonstrate that Tan's nepionic mutants are variable, even in the course of a short period. The evolutionary change of the nepionic mutants is consistent with the evolutionary change of Cycloclypeus as a whole. The number of secondary chamberlets of the first neanic chamber is considered a valuable characteristic for the identification of species. Reduction of the number of nepionic chambers in the course of time is thought to result from the occurrence of 'transitional nepionic variants'.
Tipo: Article / Letter to the editor
Palavras-chave: 38.20.
Ano: 1972
URL: http://www.repository.naturalis.nl/record/317468

Isolated tubercles of some Palaeoscolecida
Provedor de dados: 16
Autores: Boogaard, M. van den.
Tubercles of Palaeoscolex? tenensis Kraft &amp; Mergl, 1989 found as isolated phosphatic microfossils in Ordovician limestones are described. The probability that the phosphatic microfossils assigned to the genera Hadimopanella Gedik, 1977 and Milaculum Müller, 1973 represent tubercles of palaeoscolecidans is discussed. A relation between Palaeoscolecida and Chordata is hinted at.
Tipo: Article / Letter to the editor
Palavras-chave: 38.20.
Ano: 1989
URL: http://www.repository.naturalis.nl/record/317544

Lower Palaeozoic erratic favositids from the Island of Sylt, Germany
Provedor de dados: 16
Autores: Stel, J.H.
Twelve species of favositids are described. They are derived from silicified boulders found in Pliocene (?) deposits of the Island of Sylt, Germany. Paleofavosites is the dominant genus in this material. Two new species are described, viz. Paleofavosites oekentorpi and Favosites schuddebeursi.
Tipo: Article / Letter to the editor
Palavras-chave: 38.20.
Ano: 1991
URL: http://www.repository.naturalis.nl/record/317528

Northeast Atlantic Late Quaternary planktic Foraminifera as primary productivity and water mass indicators
Provedor de dados: 16
Autores: Kreveld, S.A. van.
Primary productivity and water mass reconstructions based on planktic Foraminifera reveal distinct interglacial/glacial variations for the past 208 ka in a mid-latitude Northeast Atlantic piston core. Average total planktic foraminiferal absolute frequencies and accumulation rates, which are interpreted to reflect primary productivity, are higher in interglacial than in glacial sediments. Low total planktic foraminiferal absolute frequencies and accumulation rates in 'Heinrich layers' are likewise interpreted to show low production of Foraminifera due to low surface ocean fertility. 'Heinrich layers' are enriched in ice-rafted debris, recording periods of massive iceberg production and rapid melting in the Northeast Atlantic. The dominance of...
Tipo: Article / Letter to the editor
Palavras-chave: 38.20.
Ano: 1996
URL: http://www.repository.naturalis.nl/record/317525

Analysis of pseudorbitoids from Glenbrook, Jamaica, and discussion of a study by Cole &amp; Applin (1970)
Provedor de dados: 16
Autores: Krijnen, J.P.
Pseudorbitoid foraminifera from Glenbrook area, Jamaica, are analysed and identified as Pseudorbitoides trechmanni trechmanni Douvillé, 1922 in sample J 4044, and as P. trechmanni trechmanni or P. israelskyi Vaughan &amp; Cole, 1932 in sample J 4043. The present author disagrees with Cole &amp; Applin's conclusions concerning the arrangement of juvenile chambers in P. trechmanni trechmanni and is of the opinion that their definition of this form has to be withdrawn. He favours Brönnimann's principles of subdividing Pseudorbitoides (1954-1958) on the basis of stages of nepionic reduction, resulting in a distinction of species according 1) to a shift in the distribution of the number of primary chambers in exclusively uniserial populations, and 2) to a...
Tipo: Article / Letter to the editor
Palavras-chave: 38.20.
Ano: 1971
URL: http://www.repository.naturalis.nl/record/317546

Palaeontological collections at the Geological Museum, University of Copenhagen: from Cabinet of Curiosities to databases
Provedor de dados: 16
Autores: Harper, D.A.T.
Geological collections were established in the University of Copenhagen during the early 1700s with the presentation of fossil, mineral and rock collections by Count A.G. Moltke, mainly assembled by Ole Worm (1588-1654) in his Museum Wormianum. Currently the palaeontological collections in the Geological Museum, alone, contain over 1 million specimens, including 26,000 types. The focus of the collection remains on material from Denmark and Greenland. Highlights from Greenland include evidence of early life from the Archaean Isua Complex, the early Cambrian Sirius Passet fauna, Devonian amphibians, Triassic dinosaurs, mammals and pterosaurs, Jurassic and Cretaceous ammonites together with Jurassic and Cretaceous plants. The Danish collections are dominated...
Tipo: Article / Letter to the editor
Palavras-chave: Palaeontological collections; Denmark; Greenland; Databases; 38.20.
Ano: 2004
URL: http://www.repository.naturalis.nl/record/215457

A comparison of Lepidocyclina ferreroi (Provale, 1909) and Lepidocyclina multilobata (Gerth, 1939)
Provedor de dados: 16
Autores: O'Herne, L.
Foraminiferal collections from Java and Borneo stored in the Netherlands National Museum of Geology and Mineralogy in Leiden enables to study the range of variation in Lepidocyclina ferreroi and L. multilobata. Taken separately many features considered typical of L. multilobata and L. ferreroi are insufficient to identify the specimens. When typically developed both species are highly characteristic and easily distinguished. Transitional forms however cannot be classified with certainty. Possibly L. multilobata has evolved from L. ferreroi but too little is known about the ages of the two species, especially of L. multilobata. L. crucifera is probably a form of L. ferreroi with four rays distinguished by the development of more than one tubercle on each...
Tipo: Article / Letter to the editor
Palavras-chave: 38.20.
Ano: 1976
URL: http://www.repository.naturalis.nl/record/317538

Statistical reconstruction of the Palmatolepis apparatus (Late Devonian conodontophorids) at the generic, sub-generic, and specific level
Provedor de dados: 16
Autores: Boogaard, M. van den; Kuhry, B.
Extensive frequency data are used for a reconstruction of Devonian cunodont apparatuses. Correspondence analysis and a related clustering method are selected as statistical tools, and are used as informal methods for testing a priori hypotheses rather than as search mechanisms. In our view, the Palmatolepis apparatus consists of palmatolepan P elements, tripodellan or nothognathellan O elements, palmatodellan and smithiform N elements, and a symmetry transition consisting of falcodontan A1 elements, asymmetrical scutulan A2 elements, and symmetrical scutulan A3 elements. A peculiar phenomenon, already described by other authors, is the numerical dominance of the P elements, which are on the average 15 times as frequent as corresponding O and N elements. It...
Tipo: Article / Letter to the editor
Palavras-chave: 38.20.
Ano: 1979
URL: http://www.repository.naturalis.nl/record/317498

Some data on Milaculum Müller, 1973
Provedor de dados: 16
Autores: Boogaard, M. van den.
An investigation of some faunas rich in Milaculum Müller, 1973 lead to the conclusion that the Milaculum animal was - at least partly - covered by plates of different morphology. Several specimens of Milaculum were encountered with adhering smaller platelets showing that the epidermal tissue of this animal consisted of a mosaic of larger and smaller plates. The characteristics of the material encountered are suggestive of an agnathan affinity of Milaculum. Two new species are described, Milaculum balticum from the Upper Ordovician of Estonia and M. longmyndium from the Lower Silurian of the Welsh Borderland.
Tipo: Article / Letter to the editor
Palavras-chave: 38.20.
Ano: 1988
URL: http://www.repository.naturalis.nl/record/317535

Characterisation of the latest Aragonian - Early Vallesian (late Miocene) in the central Ebro Basin (NE Spain)
Provedor de dados: 16
Autores: Agustí, J.; Arenas, C.; Cabrera, L.; Pardo, G.
The occurrence of Ramys cf. perezi in the Miocene sequences of the Central Ebro Basin allows to locate the Aragonian-Vallesian transition (Late Miocene) in the alluvial and lacustrine sequences which make up the upper part of the basin sediments in the Sierra Alcubierre. These new data determine the age of the upper genetic unit defined in the central basin sectors, and mark the relationships between the Ebro Basin faunal assemblages and those from other Spanish basins included in the Central Iberian palaeobiogeographic province (e.g. Teruel and Duero Basins).
Tipo: Article / Letter to the editor
Palavras-chave: 38.20.
Ano: 1994
URL: http://www.repository.naturalis.nl/record/317510

Early Phanerozoic trace fossils from the Sierra Albarrana quartzites (Ossa-Morena Zone, Southwest Spain)
Provedor de dados: 16
Autores: Marcos, A.; Azor, A.; González, F.; Simancas, F.
Three ichnogenera are described from a 50 to 500 m thick shallow-water sandstone-shale sequence (Sierra Albarrana Quartzites). The ichnofauna consists of the burrows of worm-like animals (Arenicolites, Monocraterion, and Skolithos). The age of this formation, previously considered to be Precambrian or Palaeozoic, has been the subject of discussions. We may now assign it an Early Phanerozoic age, in agreement with the known stratigraphic distribution of the ichnofossils found.
Tipo: Article / Letter to the editor
Palavras-chave: 38.20.
Ano: 1991
URL: http://www.repository.naturalis.nl/record/317447

A reconsideration of Amphistegina lessonii d'Orbigny, 1826, sensu Brady, 1884 (Foraminifera)
Provedor de dados: 16
Autores: O'Herne, L.
At least three of the forms described by Brady (1884) as Amphistegina lessonii show specimens with monocular as well as bilocular nucleoconches, probably representing the microspheric and macrospheric generations. Except for the shape of the embryonic apparatus both generations are identical or practically so. Assuming that dimorphism occurs in Amphistegina, the above suggests that several species should be distinguished in Brady's Amphistegina lessonii. The internal structure of A. lessonii is illustrated by photographs and schematic drawings.
Tipo: Article / Letter to the editor
Palavras-chave: 38.20.
Ano: 1974
URL: http://www.repository.naturalis.nl/record/317469

Fossils of the type Maastrichtian
Provedor de dados: 16
Autores: 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

The Royal Natural History Collection in Vienna (18th century): from possessing minerals as a private treasure towards territorial ambitions as consciousness
Provedor de dados: 16
Autores: Klemun, M.
This paper deals with a famous private natural history collection of the court, transformed to a public collection of the state. Associated is a very important question: how cultural and political structures became a dimension of a collection. In order to establish a Court Natural History Cabinet of its own, separate from other collections (“Physical Cabinet,” The Coin and Antique Collection), Emperor Franz Stephan von Lothringen (1708- 1765) decides in the middle of the 18th century to buy the famous ‘museo’ of Jean de Baillou, who had worked as a director of gardens and mines in Tuscany. The Collection of de Baillou consisted mainly of minerals, which were collected in Italy (some came from famous places all over the world), and fossils, particularly...
Tipo: Article / Letter to the editor
Palavras-chave: Royal Natural History Collection; Vienna; History; 38.20.
Ano: 2004
URL: http://www.repository.naturalis.nl/record/215463

Distribution of copepod egg-envelopes in sub-Recent sediments from the Banda Sea (Indonesia)
Provedor de dados: 16
Autores: Waveren, I.M. van.
Sediment samples from the Banda Sea were clustered according to the percentages of the different morphotypes of copepod egg-envelopes they contained. The clustering indicates a geographically distinct cluster determined by the occurrence of higher percentages of a single type of copepod egg envelope. It may be indicative of the influence of Equatorial Indian Ocean surface water, notably in the southwestern part of the Banda Sea that is not affected by upwelling.
Tipo: Article / Letter to the editor
Palavras-chave: 38.20.
Ano: 1994
URL: http://www.repository.naturalis.nl/record/317529

Systematic ichnology of microborings from the Cenozoic White Limestone Group, Jamaica, West Indies
Provedor de dados: 16
Autores: Blissett, D.J.; Pickerill, R.K.
The Middle Eocene to Middle Miocene White Limestone Group of Jamaica contains a common and diverse, poorly to well-preserved microboring ichnofauna, namely Centrichnus eccentricus Bromley &amp; Martinell, Curvichnus pediformis isp. nov., Dendrorete balani Tavernier, Campbell &amp; Golubic, Dipatulichnus rotundus Nielsen &amp; Nielsen, Entobia volzi Bromley &amp; D’Alessandro, Entobia isp. cf. E. ovula Bromley &amp; D’Alessandro, Entobia isp. forms A and B, Fossichnus solus Nielsen, Nielsen &amp; Bromley, Maeandropolydora elegans Bromley &amp; D’Alessandro, Maeandropolydora sulcans Voigt, Oichnus asperus Nielsen &amp; Nielsen, Oichnus excavatus Donovan &amp; Jagt, Oichnus gradatus Nielsen &amp; Nielsen, Oichnus ovalis Bromley, Oichnus paraboloides Bromley,...
Tipo: Article / Letter to the editor
Palavras-chave: Ichnotaxonomy; Microborings; Jamaica; West Indies; Eocene; Oligocene; Miocene; 38.20.
Ano: 2007
URL: http://www.repository.naturalis.nl/record/217416

Studies on some Miogypsinoides-Miogypsina s.s. associations with special reference to morphological features
Provedor de dados: 16
Autores: Bock, J.F. de.
The primary differentiation within the genus Miogypsina is based on features seen in vertical sections. The subgenus Miogypsinoides lacks lateral chambers and the equatorial plane is covered on each side by zones of massive laminae, whereas the subgenus Miogypsina has well-developed lateral chambers on each side of the equatorial layer. Miogypsinoides shows an intraseptal canal system, due to the presence of a toothplate and a septal flap which are not found in Miogypsina s.s. Several samples contained specimens which show the possible transition from Miogypsinoides to Miogypsina s.s. The disappearance of the septal flap and the toothplate in Miogypsina was probably simultaneous with the appearance of lateral chambers. It seems that the existence of...
Tipo: Article / Letter to the editor
Palavras-chave: 38.20.
Ano: 1976
URL: http://www.repository.naturalis.nl/record/317461

The Paleogene Richmond Formation of Jamaica: Not an impact related succession - a comment
Provedor de dados: 16
Autores: James, K.H.
Donovan &amp; Pickerill published a short paper in 2008 which was essentially a comment on just part of an earlier contribution (James, 2005) on a broader topic. Although the latter was published in Caribbean Journal of Earth Sciences, to which Donovan &amp; Pickerill originally submitted their paper, this journal has not been published since late 2005. Of necessity, this discussion has moved elsewhere.
Tipo: Article / Letter to the editor
Palavras-chave: Jamaica; Paleogene; Richmond Formation; Tectonics; K/T event; 38.20.
Ano: 2009
URL: http://www.repository.naturalis.nl/record/313867