References of "Steemans, Philippe"
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See detailEdad de las esporas de la Formacion Los Espejos, Silurico de la Precordillera de San Juan, Argentina
Rubinstein, Claudia; Muro, V.J.; Steemans, Philippe ULg

Conference (2010)

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See detailThe early land plants from the Armorican Massif: sedimentological and palynological considerations on age and environment
Strullu-Derrien, Christine; Ducassou, Céline; Ballèvre, Michel et al

in Geological Magazine (2010), 147(6), 830-843

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See detailEarly Middle Ordovician evidence for land plants in Argentina (eastern Gondwana)
Rubinstein, C. V.; Gerrienne, Philippe ULg; de la Puente, G. S. et al

in New Phytologist (2010), 188

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See detailMiscellanea palaeontologica
Gerrienne, Philippe ULg; Petus, Elodie ULg; Steemans, Philippe ULg

Book published by Paléogéobio. Paléobot. Paléopalyno. (2009)

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See detailPaleophytogeographic distribution of Devonian miospore assemblages
Breuer, Pierre; Steemans, Philippe ULg; Di Pasquo, Mercedes

Conference (2009, September)

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See detailThe most biostratigraphic important miospore species from the Ordovician up to the Silurian (part I)
Steemans, Philippe ULg; Petus, Elodie ULg

Report (2009)

Palynological research project in collaboration with CENPES/BPA palynologists (Petrobras). First project (2009) Presented next are details of the consulting research project “Ordovician – Middle Devonian ... [more ▼]

Palynological research project in collaboration with CENPES/BPA palynologists (Petrobras). First project (2009) Presented next are details of the consulting research project “Ordovician – Middle Devonian miospore collection and database”, devised for exclusive use by CENPES/BPA palynologists. The project consists in mounting a palynological reference collection of biostratigraphically most important spores and cryptospores from the Ordovician through the Middle Devonian. It implies a minimum of 150 selected species. Most of them will be from the Gondwana Supercontinent. However, some stratigraphically relevant species known from Euramerica will be also included, as they could prove potentially useful for future work and comparison with Gondwanan taxa. Two main parts will compose the final product of the project: the reference slide collection proper, and the database. a) Sufficiently well preserved specimens (identifiable at species level) will be located on conventional palynological slides by means of an England Finder graticule. The slides will be numbered and stored in special boxes. The slides will be mounted at Université de Liège, Belgium, with the whole assemblage of palynomorphs recovered from the organic residues after the processing of selected samples at the University. Provenance data for each reference slide will be provided whenever possible, including: country, basin, rock unit (fm.), biostratigraphic unit, and age. An appropriate number of specimens (so as to cover an array of size and morphological variability) will be referenced for each species – although not necessarily on the same slide. Every selected specimen will be photographed. All these data will be stored in the database. b) The database will be organized by using the software FileMaker Pro (we do not provide the software - for more information see http://www.filemaker.co.uk/). The database will be saved on CDRom or DVD media. The database will consist of: - The original description of each species and a high-resolution scanned (PDF) copy of publications illustrating the type specimens. A synthetic additional description of the specimens will be added, and the main differences from morphologically similar species will be stressed. - Synonymy lists. - Stratigraphic ranges (age and zonal span). - Geographic distribution. - A complete list of bibliographic references from which the above data are compiled. - Reference slide data (slide numbers and England Finder coordinates). - High-resolution pictures of all selected specimens in the slide collection, including detail pictures when deemed necessary for the species characterization. - A keyword research tool (e.g.: search for morphology, stratigraphy, taxa names, slides). [less ▲]

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See detailOrigin and radiation of the earliest vascular land plants
Steemans, Philippe ULg; Le Herisse, A.; Melvin, J. et al

in Science (2009), 324

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See detailA Lilliputian lignophyte from the Lower Devonian?
Gerrienne, Philippe ULg; Strullu-Derrien, C.; Steemans, Philippe ULg

Conference (2008, November 27)

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See detailAn Ordovician cryptospore and trilete spore assemblage from Saudi Arabia
Steemans, Philippe ULg; Wellman, C. H.; Miller, M. et al

Conference (2008, August 30)

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See detailDevonian mio-and megaspores in Western Gondwana
Steemans, Philippe ULg; Breuer, Pierre; Miller, M.

Conference (2008)

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See detailMarine and fresh water palynomorphs from the Jauf Formation, Northwest Saudi Arabia
Miller, A.; Breuer, P.; Al-Ghazi, A. et al

Conference (2008)

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See detailA distinctive marginal marine palynological assemblage from the Pridoli of Northwestern Saudi Arabia
Al-Hajri, S.; Verniers, J.; Paris, F. et al

Conference (2008)

This paper describes a rare occurrence of a rich and diverse palynological assemblage from a controversial stratigraphic unit in well EW8 in northwestern Saudi Arabia. The composition of this assemblage ... [more ▼]

This paper describes a rare occurrence of a rich and diverse palynological assemblage from a controversial stratigraphic unit in well EW8 in northwestern Saudi Arabia. The composition of this assemblage strongly suggests a Pridoli age and therefore it is referred here to the Tawil Formation. The assemblage encountered contains very characteristic chitinozoans, acritarchs, tasmanities, scolecodontsm, eurypterid cuticle and common land-derived miospores and hilate cryptospores. Chitinozoans such as Margachitina elegans, Ancyrochitina fragilis brevis, Ancyrochitina fragilis, Sphaerochitina sphaerocephala, Urnochitina urna, Pseudochlathrochitina carmenchui and Lagenochitina brevicollis confer the Pridoli age assignment. This assemblage of chitinozoans correlates very well with Assemblage D from the Alternances Gréso-Argileuses Formation of the A1-61 well in northwestern Libya. Among the acritarchs present are: Cymbosphaeridium pilar, Leoniella carminae,Diexallophasis spp., Tunisphaeridium cf caudatum, Leiofusa estrecha and Eupoikilofusa striatifera. <br /> <br />Furthermore, the join occurrence of U. urna, P. carmenchui and M. elegans is clearly indicative of the middle part of the Pridoli as in the Libyan well A1-61, and in many wells in Algeria. This corresponds to what is considered to be a transgressive mid Pridoli event in the Algerian Sahara, with non marine intervals bracketing this brief marine sea level rise. This event is likely to have extended into all of north Gondwana including Arabia. [less ▲]

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