Lepidodendron

Lepidodendron Lepidodendron were arborescent lycopsids prominent in the Carboniferous, forming distinctive coal swamp floras that influenced coal formation in Europe and North America. These plants appear in many classic paleobotanical studies tied to museum collections and geological surveys conducted during the 19th and 20th centuries.

Description and morphology

Lepidodendron had unbranched or dichotomously branching trunks with a scaly bark pattern marked by diamond-shaped leaf cushions; descriptions of these cushions appear in comparative works associated with the Geological Society of London, Smithsonian Institution, Natural History Museum, London, British Geological Survey, and Yale Peabody Museum. The vascular anatomy, including a central vascular bundle and peripheral xylem, was documented in anatomical reports linked to researchers at University of Cambridge, University of Oxford, University of Chicago, University of Pennsylvania, and Harvard University. Leaves were long and narrow, borne on cushions that bore surface scars similar to those illustrated in plates from the Royal Society, Deutsche Botanische Gesellschaft, Palaeontographical Society, American Museum of Natural History, and Carnegie Institution. Reproductive structures included strobili and sporangia, discussed in monographs from Linnaean Society of London, Royal Botanic Gardens, Kew, Field Museum of Natural History, Smithsonian Institution Libraries, and archives of the Geological Society of America.

Taxonomy and species

Taxonomic treatments of Lepidodendron have been debated in systematic reviews published by authors associated with Charles Darwin University, University of Edinburgh, Imperial College London, University of Bonn, and University of Göttingen. Species concepts were refined in catalogues housed at the Natural History Museum, Vienna, Muséum national d'Histoire naturelle, British Museum, National Museum of Scotland, and Smithsonian National Museum of Natural History. Type specimens and species-level names are preserved in collections curated by the Royal Botanic Gardens, Kew, Natural History Museum, London, University of Cambridge Botany School, University of Glasgow, and Yale University Herbarium. Classic species descriptions were advanced in correspondence and publications linked to figures from the Geological Survey of Canada, United States Geological Survey, University of Toronto, University of Michigan, and McGill University.

Paleobiology and growth habit

Growth models for Lepidodendron draw on comparisons in experimental and theoretical work associated with institutions such as Massachusetts Institute of Technology, California Institute of Technology, Max Planck Society, Smithsonian Tropical Research Institute, and Scripps Institution of Oceanography. Interpretations of rapid primary growth and determinate secondary tissues were argued in papers tied to labs at University of California, Berkeley, University of Illinois Urbana-Champaign, Pennsylvania State University, Stanford University, and University of Texas at Austin. Physiological reconstructions, including water transport and carbon allocation, reference interdisciplinary studies from Royal Society of Edinburgh, European Geosciences Union, American Geophysical Union, International Paleontological Association, and researchers affiliated with Brock University and University of Leeds. Studies of life history and reproductive cycles connect to paleobotanical syntheses produced by scholars at University College London, University of St Andrews, Queen Mary University of London, University of Liverpool, and University of Birmingham.

Paleoecology and distribution

Lepidodendron dominated Carboniferous coal swamps documented across paleocontinents in fieldwork coordinated by the British Geological Survey, United States Geological Survey, Geological Survey of Canada, Bureau of Mines (UK), and Geological Survey of India. Fossil occurrences are common in basins studied by researchers from Appalachian Basin Commission, Merseyside Research Institute, Rhineland-Palatinate Geological Survey, Silesian Institute, and institutions in regions such as Pennsylvania, West Virginia, Silesia, Scotland, and Saarland. Paleoecological reconstructions link Lepidodendron communities to contemporaneous taxa cited in compendia from Royal Society, Paleontological Society, University of Kansas Natural History Museum, Ohio Geological Survey, and Illinois State Geological Survey. Climate and sea-level interpretations placing Lepidodendron in equatorial coal-forming wetlands are integrated into syntheses published by the International Commission on Stratigraphy, Intergovernmental Panel on Climate Change contributors, Cambridge University Press, and researchers at University of Melbourne.

Fossil record and preservation methods

Fossils of Lepidodendron are preserved as permineralizations, compressions, casts, and coalified compressions examined in collections at the Natural History Museum, London, Smithsonian Institution, Field Museum of Natural History, Royal Ontario Museum, and NHM Vienna. Preparation and imaging techniques for Lepidodendron specimens have been refined with equipment and protocols from British Geological Survey, Smithsonian Institution, Max Planck Institute for the Science of Human History, University of Manchester, and Royal Society. Taphonomic studies and geochemical analyses, including stable isotope and palynological approaches, have been conducted by teams at Purdue University, University of Kansas, Kansas Geological Survey, University of California, Santa Cruz, and University of Leeds. Iconic fossil localities housing well-preserved Lepidodendron include sites curated by Pennsylvania Department of Conservation and Natural Resources, West Virginia Geological and Economic Survey, Silesian Museum, Museo Geológico Nacional (Spain), and state and national museums that present these specimens in public exhibitions.

Category:Prehistoric lycophytes