References of "Steemans, Philippe"
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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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See detailPalynology of the Palaeozoic
Steemans, Philippe ULg

Scientific conference (2008)

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See detailLatest developments in palynology and palaeobotany
Steemans, Philippe ULg; Gerrienne, Philippe ULg

Book published by Paléogéobio. Paléobot. Paléopalyno. (2008)

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See detailPetrobras report January 2008
Steemans, Philippe ULg

Report (2008)

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See detailCommission Internationale de la Microflore du Paléozoïque (CIMP)
Steemans, Philippe ULg

Computer development (2008)

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See detailSiluro-Devonian miospore biostratigraphy of the Urubu River area, western Amazon Basin, northern Brazil
Steemans, Philippe ULg; Rubinstein, C.; Melo, J. H. G.

in Geobios (2008), 41

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See detailLochkovian (Early Devonian) acritarchs and prasinophytes from the Solimões Basin, nortwestern Brazil
Rubinstein, C. V.; Le Hérissé, A.; Steemans, Philippe ULg

in Neues Jahrbuch für Geologie und Palaontologie. Abhandlungen (2008), 249(2), 167-184

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See detailPalaeophytogeographical and palaeoecological implications of a miospore assemblage of earliest Devonian (Lochkovian) age from Saudi Arabia
Steemans, Philippe ULg; Wellman, C. H.; Filatoff, J.

in Palaeogeography, Palaeoclimatology, Palaeoecology (2007), 250(1-4), 237-254

Palynological samples from two boreholes drilled in the eastern part of Saudi Arabia contain a rich assemblage of cryptospores and trilete spores. They are dated as most probably Lochkovian in age ... [more ▼]

Palynological samples from two boreholes drilled in the eastern part of Saudi Arabia contain a rich assemblage of cryptospores and trilete spores. They are dated as most probably Lochkovian in age. Intriguingly, the cryptospores are very similar to those from a coeval continental palynomorph assemblage from the Old Red Sandstone Continent, whereas the trilete spores show a strong affinity with miospore assemblages from Western Gondwana. It is suggested that cryptospore-producing plants inhabited confined, damp biotopes and had a wide range of climatic tolerance. On the otherhand, trilete spore-producing plants inhabited a wider variety of biotopes but were more sensitive to climatic variations. The high degree of similarity between Old Red Sandstone and Saudi Arabian cryptospore assemblages favours palaeogeographic reconstructions where there is close proximity between Western Gondwana and Euramerica and/or a land connection between these palaeoplates. Climatic differences between the Old Red Sandstone Continent and the northern part of Western Gondwana can be invoked to explain the variations in the trilete spore assemblages. (c) 2007 Elsevier B.V. All rights reserved. [less ▲]

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See detailNew palynological data from the Devonian Villavicencio Formation, Precordillera of Mendoza, Argentina
Rubinstein, C. V.; Steemans, Philippe ULg

in Ameghiniana (2007), 44(1), 3-9

New terrestrial and marine palynomorphs of the lower part of the Villavicencio Formation, San Isidro Creek, Precordillera of Mendoza, Argentina, are evaluated. The palynomorph assemblage is dominated by ... [more ▼]

New terrestrial and marine palynomorphs of the lower part of the Villavicencio Formation, San Isidro Creek, Precordillera of Mendoza, Argentina, are evaluated. The palynomorph assemblage is dominated by miospores, and also contains acritarchs and scarce chitinozoans. Different processing methods have been tested due to the poor preservation state of the palynomorphs. The new slides provided abundant and diverse palynomorphs and allowed the recognition of 13 miospore species and two acritarch species. This review suggests a late Pragian to early Emsian age, thus confirming and refining previous palynological dating. The miospore assemblage may be correlated with the upper part of the Ems Biozone in terms of the Devonian miospore zonation of the Brazilian Amazon Basin. Palaeogeographically; acritarchs show perigondwanan affinities. In the light of this refined age determination, the stratigraphic and phytogeographic inferences for the Precordillera land plants should be reconsidered. [less ▲]

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See detailResultados Palinoestratigráficos do Devoniano da Sub-Bacia de Alto Garças (Bacia do Paraná - Brasil)
Mendlowicz Mauller, P.; Machado Cardoso, T. R.; Pereira, E. et al

in Carvalho, I.S.; Cassab, R.C.T.; Schwanke, C. (Eds.) et al Paleontologia: cenários de Vida (2007)

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See detailEarly to Middle Devonian miospores from northern Saudi Arabia
Breuer, P.; Al-Ghazi, A.; Al-Ruwaili, M. et al

in Revue de Micropaléontologie (2007), 50

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