Devonian miospores from northwestern Gondwana

in Palaeontology (in press)

Late Ordovician-earliest Silurian palynomorphs from northern Chad and correlation with contemporaneous deposits of southeastern Libya

in Bulletin of Geosciences (in press)

Spore assemblages from Upper Ordovician and lowermost Silurian sediments recovered from the Qusaiba-1 shallow core hole, Qasim region, central Saudi Arabia

in GeoArabia (in press)

A new Devonian flora in Argentina: palaeobotanical and stratigraphic implications

Conference (2012)

Early land plant spore assemblages from the Late Silurian of Skane, Sweden

in Geologiska Föreningens i Stockholm Förhandlingar (2012), 134(2), 133-144

A palynological study based on sedimentary rocks (mainly calcareous siltstones and mudstones with minor carbonate beds) from the upper Silurian Öved-Ramsåsa Group in the Klinta 1 and Bjärsjölagård 2 ... [more ▼]

A palynological study based on sedimentary rocks (mainly calcareous siltstones and mudstones with minor carbonate beds) from the upper Silurian Öved-Ramsåsa Group in the Klinta 1 and Bjärsjölagård 2 drillcores, Skåne, Sweden, reveals a rich assemblage of well-preserved spores produced by early land plants. Thirty-four spore taxa belonging to 19 genera, including the new species Scylaspora klintaensis sp. nov., were identified. The palynoflora is characterized by cryptospores and trilete spores. The dominant spore species are the cryptospores Gneudnaspora plicata followed by Gneudnaspora divellomedia. Based on the presence of biostratigraphically important spore species such as Hispanaediscus lamontii, Artemopyra radiata, Emphanisporites neglectus, Synorisporites cf. libycus and Synorisporites tripapillatus, the age of the studied strata is interpreted to be of a Late Silurian age. Although the palynological assemblages are strongly dominated by miospores and other land plant fragments, marine microfossils are also present and the sedimentary succession is interpreted to have been deposited in a nearshore marine environment. [less ▲]

Miospores from Ordovician-Silurian Argentinean basins: evolution and relationships with other South American basins

Conference (2011, September)

Diverse assemblages of Mid Devonian megaspores from Libya

in Review of Palaeobotany and Palynology (2011), 165

[en] A restudy of Devonian palynological assemblages of samples from the A1-69 borehole, drilled in the Ghadamis Basin, western Libya, North Africa has led to the discovery of numerous well-preserved ... [more ▼]

[en] A restudy of Devonian palynological assemblages of samples from the A1-69 borehole, drilled in the Ghadamis Basin, western Libya, North Africa has led to the discovery of numerous well-preserved megaspores amongst abundant miospores, rare acritarchs and rare chitinozoans. Thirteen samples from base to top, 1496 ft (456 m) up to 965 ft (294 m), contain the richest Devonian megaspore assemblages from northwestern Gondwana. The section is dated by a rich diverse miospore assemblage indicating the presence of the upper part of the AD pre-Lem Biozone up to the lower part of the TCo Oppel Zone, ranging from a latest Eifelian or earliest Givetian age up to a latest Givetian or an earliest Frasnian age. Seventeen megaspore taxa have been identified. Among them, two new species (Biharisporites lugardonii and Lagenicula milleri) and four new varieties (Corystisporites acutispinosus var. acutispinosus and var. bullatus, Heliotriletes longispinosus var. longispinosus and var. radiatus) are described. One new possible megaspore species is also described: Verruciretusispora labiosa sp. nov. One core sample (1293 ft, 394 m) contains several specimens of very large megaspores (ca. 1 mm), the largest known from Devonian localities (except for one specimen observed in the Givetian from Belgium). Among the 17 megaspore taxa from Libya, 6 are present on the Euramerican Continent. This observation is in accordance with previous palynological conclusions that favour the absence of palaeogeographic barriers between the Euramerican and Gondwanan continents that are suggested to be grouped together in a “Pre-Pangea” land mass. [less ▲]

Miscellanea palaeontologica 2010

Book published by Paléogéobio. Paléobot. Paléopalyno. (2010)

The most biostratigraphic important miospore species from the Late Devonian, Euramerica (part I)

Report (2010)

Palynological research project in collaboration with CENPES/BPA palynologists (Petrobras). Second project (2010-2012) Presented next are details of the consulting research project on "Upper Devonian – ... [more ▼]

Palynological research project in collaboration with CENPES/BPA palynologists (Petrobras). Second project (2010-2012) Presented next are details of the consulting research project on "Upper Devonian – Lower Pennsylvanian miospore collection and database" devised exclusively for CENPES/BPA palynologists. Project description The mounting of a palynological reference collection and database of biostratigraphically important miospores from the Upper Devonian through the Lower Pennsylvanian (Namurian). This includes a minimum of 150 selected species from Western Europe, and a minimum of 150 selected species from Gondwana. It should be noted that several stratigraphically relevant species are common to both regions, but the collection will emphasize regional differences in their size and morphography. Two main parts will compose the final product: 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 ▲]

Edad de las esporas de la Formacion Los Espejos, Silurico de la Precordillera de San Juan, Argentina

Conference (2010)