A5073496917- Geology and Paleoclimatology Research
- Paleontology and Stratigraphy of Fossils
- Plant Diversity and Evolution
- Protist diversity and phylogeny
- Methane Hydrates and Related Phenomena
- Geological formations and processes
- Geochemistry and Elemental Analysis
- Plant and Fungal Species Descriptions
- Hydrocarbon exploration and reservoir analysis
- Bryophyte Studies and Records
- Marine and coastal plant biology
- Paleontology and Evolutionary Biology
- Fern and Epiphyte Biology
- Geological and Geophysical Studies
- Geological and Geochemical Analysis
- Botany and Plant Ecology Studies
- Marine and environmental studies
- Plant Parasitism and Resistance
- Botany, Ecology, and Taxonomy Studies
- Marine Biology and Ecology Research
- Pleistocene-Era Hominins and Archaeology
- Marine and coastal ecosystems
- Legume Nitrogen Fixing Symbiosis
- Plant Taxonomy and Phylogenetics
- Parasitic Infections and Diagnostics
Boston College
2014-2024
Centre National de la Recherche Scientifique
2015
Boston University
1987-1991
University of North Carolina at Chapel Hill
1990
Dickinson College
1983
Harvard University
1979-1982
Abstract Macerations of greenish shales from the Tuscarora Formation (Llandoverian) and Clinton? strata (Wenlockian) in central eastern Pennsylvania yield a remarkable assemblage spores probable spores, dyads, spore tetrads, tubular cuticle‐like structures. These are considered as remains pre‐vascular plant, terrestrial flora discussed according to this interpretation. Although study is preliminary nature, we have described following new taxa: Rugosphaera tuscarorensis (n.gen., n.sp.),...
The timing of land plant origins Until now, the first fossil evidence plants was from Devonian era 420 million years ago. However, molecular phylogenetic has suggested an earlier origin in Cambrian. Strother et al . describe assemblage spores Ordivician deposits Australia dating to approximately 480 ago (see Perspective by Gensel). These are intermediate morphology between confirmed and forms uncertain relationship. This finding may help resolve discrepancies data for origins. —AMS
Research Article| January 01, 1996 New evidence for land plants from the lower Middle Ordovician of Saudi Arabia Paul K. Strother; Strother 1Boston College Department Geology and Geophysics, Weston Observatory, Weston, Massachusetts 02193 Search other works by this author on: GSW Google Scholar Said Al-Hajri; Al-Hajri 2Saudi Aramco, P.O. Box 2141, Dhahran 31311, Alfred Traverse 3Department Geosciences, Pennsylvania State University, University Park, 16802 (1996) 24 (1): 55–58....
Organic-walled microfossils provide the best insights into composition and evolution of biosphere through first 80 percent Earth history. The mechanism microfossil preservation affects quality biological information retained informs understanding early palaeo-environments. We here show that 1 billion-year-old from non-marine Torridon Group are remarkably preserved by a combination clay minerals phosphate, with providing highest fidelity preservation. Fe-rich mostly occurs in narrow zones...
The oldest ancestors of moths and butterflies evolved in a gymnosperm world.
Soils are a crucial link between the atmosphere, biosphere, and geosphere. Any disturbance to health of soils will severely impact plants as well multitude organisms living in or on soils, such fungi, bacteria, insects. Catastrophic soil loss is thought have played pivotal role during mass-extinction events result major deforestation, but exact feedbacks remain elusive. Here, we assess end-Triassic event based proxy data obtained from four sediment sections recovered France, Germany,...
Abstract The cryptospores are a class of sporomorphs which is distinct from trilete and monolete spores, pollen grains acritarchs. These spore‐like palynomorphs similar in many respects to spores embryophytes. Because immediate biological affinity unknown for species cryptospores, their classification most effectively achieved through the construction an artificial system. schema presented here one based on morphology does not represent phylogenetic groups basis ancestor‐descendant...
The streptophyte water-to-land transition was a pivotal, but poorly understood event in Earth history. While some early-diverging modern algae are aeroterrestrial (living subaerial habitats), survival had not been tested for Coleochaete, widely regarded as obligately aquatic and one of the extant green algal genera most closely related to embryophytes. This relationship motivated comparison Coleochaete lower Paleozoic microfossils whose relationships have uncertain.We ability two species...
Abstract Eukaryotic algae rose to ecological relevance after the Neoproterozoic Snowball Earth glaciations, but causes for this consequential evolutionary transition remain enigmatic. Cap carbonates were globally deposited directly these they are usually organic barren or thermally overprinted. Here we show that uniquely-preserved cap dolostones of Araras Group contain exceptional abundances a newly identified biomarker: 25,28-bisnorgammacerane. Its secular occurrence, carbon isotope...
Information derived from Ordovician to Devonian phytodebris is discussed in terms of its utility phylogenetic; bistratigraphic, paleoecologic and biogeographic studies. Several preparation techniques are described. Studies latest through Early land plant have been important addressing the origin early plants, making taxonomic distinctions at species ordinal levels, documenting phyletic radiation plants
Abstract A new chroococcalean cyanobacterium is described from approximately 1‐billion‐year‐old non‐marine deposits of the Torridonian Group Scotland and Nonesuch Formation Michigan, USA . Individual cells microfossil, Eohalothece lacustrina gen. et sp. nov., are associated with benthic microbial biofilms, but majority samples recovered in palynological preparations form large, apparently planktonic colonies, similar to extant species Microcystis In Torridonian, phosphatic nodules, we have...