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| Waveren, I.M. van. |
| Preservational circumstances, probably related to high productivity and high sedimentation rates, result in the occurrence of a wide variety of tintinnid palynomorphs in (sub-)Recent sediments of the Banda Sea. These organic (probably chitinous) remains include both loricae and cysts, as well as the stalked pouches in which the cysts were originally encapsulated. Collectively termed 'tintinnomorphs', these palynomorphs are described and classified in an informal scheme that may serve as a key to the recognition of 76 morphologically distinctive types. |
| Tipo: Article / Letter to the editor |
Palavras-chave: 38.21. |
| Ano: 1994 |
URL: http://www.repository.naturalis.nl/record/317483 |
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| Waveren, I.M. van. |
| Palynological residues from surface sediments in the Banda Sea (Indonesia) are characterised by the presence of chitinous palynomorph types that can be correlated with exoskeletons of crustaceans, notably calanoid copepods. A series of 27 palynomorph types are described and informally categorised. Also the quantitatively prominent transparent palynodebris and its diffuse degradation products are derived from crustaceans. Selective preservation of the chitinous remains is considered to be related to the effects of high plankton production and high sedimentation rate. |
| Tipo: Article / Letter to the editor |
Palavras-chave: 38.21. |
| Ano: 1994 |
URL: http://www.repository.naturalis.nl/record/317511 |
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| Waveren, I.M. van. |
| Wilhelmus Josephus Jongmans (1878-1957) was a Dutch botanist who became involved in palaeobotany at an early stage in his career. He became head of the department of the geological survey for coal winning in Limburg (‘Geologisch Bureau voor het Mijngebied’). He accumulated the bulk of the fossil plant collection now kept in the Nationaal Natuurhistorisch Museum. A great deal of this collection consists of Carboniferous material gathered during the period of coal exploitation in the south of the Netherlands, but it also reflects the research interests of its collectors and keepers and consequently is a reflection of the state of the art in palaeobotany since approximately 1920. In 1996 the Dutch Geological Survey was reorganized and the palaeobotanical... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Jongmans; Palaeobtoany; Geologisch Bureau; Carboniferous Congress; 38.21. |
| Ano: 2004 |
URL: http://www.repository.naturalis.nl/record/215475 |
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| Waveren, I.M. van. |
| Wilhelmus Josephus Jongmans (1878-1957) was a Dutch botanist who became involved in palaeobotany at an early stage in his career. He became head of the department of the geological survey for coal winning in Limburg ('Geologisch Bureau voor het Mijngebied'). He accumulated the bulk of the fossil plant collection now kept in the Nationaal Natuurhistorisch Museum. A great deal of this collection consists of Carboniferous material gathered during the period of coal exploitation in the south of the Netherlands, but it also reflects the research interests of its collectors and keepers and consequently is a reflection of the state of the art in palaeobotany since approximately 1920. In 1996 the Dutch Geological Survey was reorganized and the palaeobotanical... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 38.04. |
| Ano: 2004 |
URL: http://www.repository.naturalis.nl/record/317328 |
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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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| 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 |
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| Waveren, I.M. van; Iskandar, E.A.P.; Booi, M.; Konijnenburg-van Cittert, J.H.A. van. |
| A preliminary taxonomic revision of the Early Permian Jambi flora results in a lower number of taxa, a number of new determinations and several new combinations (Dicranophyllum molle (Jongmans & Gothan) comb. nov., Oligocarpia posthumii (Jongmans & Gothan) nov. comb., Callipteridium strictinervis (Jongmans & Gothan) comb. nov.). Cones containing the bicuspidate seeds Tobleria bicuspis are recorded for the first time. The exact stratigraphic position of the Jambi flora is unknown, but brachiopods and fusulinids indicate an Early Permian age. Comparisons with the East Asian Permian floras of the Cathaysian realm indicate that the Jambi palaeoflora can best be compared to a relatively xeric Cathaysian flora, possibly indicative of relatively high... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Plants; Permian; Indonesia; Palaeogeography; 38.21. |
| Ano: 2007 |
URL: http://www.repository.naturalis.nl/record/314193 |
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