Search Results - "Rothwell, Gar W."

Phylogenetic diversification of Early Cretaceous seed plants: The compound seed cone of Doylea tetrahedrasperma by Rothwell, Gar W., Stockey, Ruth A.

“…PREMISE OF THE STUDY: Discovery of cupulate ovules of Doylea tetrahedrasperma within a compact, compound seed cone highlights the rich diversity of…”
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Resolving the overall pattern of marattialean fern phylogeny by Rothwell, Gar W., Millay, Michael A., Stockey, Ruth A.

“…Premise of the Study Recent clarification of the distribution of Marattiales through time provides the impetus for “total evidence” phylogenetic analyses of a…”
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Fossils and plant evolution: structural fingerprints and modularity in the evo-devo paradigm by Tomescu, Alexandru M F, Rothwell, Gar W

“…Fossils constitute the principal repository of data that allow for independent tests of hypotheses of biological evolution derived from observations of the…”
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Middle Jurassic evidence for the origin of Cupressaceae: A paleobotanical context for the roles of regulatory genetics and development in the evolution of conifer seed cones by Spencer, Alan R. T., Mapes, Gene, Bateman, Richard M., Hilton, Jason, Rothwell, Gar W.

“…• Premise of the study: Triassic and Jurassic fossils record structural changes in conifer seed cones through time, provide the earliest evidence for…”
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Evolutionary diversification of taiwanioid conifers: evidence from a new Upper Cretaceous seed cone from Hokkaido, Japan by Stockey, Ruth A., Nishida, Harufumi, Rothwell, Gar W.

“…A single cylindrical seed cone 2 cm long, 1.1 cm wide has been found preserved in a calcium carbonate marine concretion from the Hakobuchi Formation (late…”
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Hughmillerites vancouverensis sp. nov. and the Cretaceous diversification of Cupressaceae by Atkinson, Brian A., Rothwell, Gar W., Stockey, Ruth A.

“…• Premise of the study: Two ovulate conifer cones, one of which is attached terminally to a short leafy shoot, reveal the presence of a new species of…”
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Is the anthophyte hypothesis alive and well? New evidence from the reproductive structures of Bennettitales by Rothwell, Gar W, Crepet, William L, Stockey, Ruth A

“…Bennettitales is an extinct group of seed plants with reproductive structures that are similar in some respects to both Gnetales and angiosperms, but…”
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Early evolution of the vascular plant body plan — the missing mechanisms by Tomescu, Alexandru MF, Wyatt, Sarah E, Hasebe, Mitsuyasu, Rothwell, Gar W

“…•The origin and homologies of the vascular plant sporophyte are in dispute.•Some hypotheses propose origin from a sterilized bryophyte sporangium.•The apical…”
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Cretaceous origin of dogwoods: an anatomically preserved Cornus (Cornaceae) fruit from the Campanian of Vancouver Island by Atkinson, Brian A, Stockey, Ruth A, Rothwell, Gar W

“…Cornaceae consists of 58 species, all within the genus . The Cenozoic record of is extensive and well documented. Molecular divergence-time studies suggest…”
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How Does the Inclusion of Fossil Data Change Our Conclusions about the Phylogenetic History of Euphyllophytes? by Rothwell, G.W, Nixon, K.C

“…Recent phylogenetic analyses have yielded conflicting results regarding relationships among ferns and other major groups of vascular plants and have prompted…”
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Seed cone anatomy of Cheirolepidiaceae (Coniferales): Reinterpreting Pararaucaria patagonica Wieland by Escapa, Ignacio H., Rothwell, Gar W., Stockey, Ruth A., Cúneo, N. Rubén

“…Premise of the study: Seed cone morphology and anatomy reflect some of the most important changes in the phylogeny and evolutionary biology of conifers…”
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Cunninghamia taylorii sp. nov., a Structurally Preserved Cupressaceous Conifer from the Upper Cretaceous (Campanian) Horseshoe Canyon Formation of Western North America by Serbet, Rudolph, Bomfleur, Benjamin, Rothwell, Gar W.

“…The fossiliferous ironstone deposits of the Upper Cretaceous Horseshoe Canyon Formation in the Drumheller badlands, Alberta, Canada, contain a diverse,…”
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A new species of Pityostrobus (Pinaceae) from the Cretaceous of California: moving towards understanding the Cretaceous radiation of Pinaceae by Smith, Selena Y., Stockey, Ruth A., Rothwell, Gar W., Little, Stefan A.

“…The evolutionary history of Pinaceae is documented by numerous fossils, which include a number of anatomically preserved ovulate cones with many systematically…”
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Structure and relationships of the Jurassic conifer seed cone Hughmillerites juddii gen. et comb. nov.: Implications for the origin and evolution of Cupressaceae by Rothwell, Gar W., Stockey, Ruth A., Mapes, Gene, Hilton, Jason

“…Anatomically preserved Jurassic conifer seed cones originally described as Conites juddi Seward and Bancroft are reinvestigated and assigned to Hughmillerites…”
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Key morphological alterations in the evolution of leaves by Sanders, Heather, Rothwell, Gar W, Wyatt, Sarah E

“…Evolution of plant form proceeds through sequential alterations in the development of plant organs. Leaves (or fronds) are organs that have diagnostic…”
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Reconsidering Relationships among Stem and Crown Group Pinaceae: Oldest Record of the Genus Pinus from the Early Cretaceous of Yorkshire, United Kingdom by Ryberg, Patricia E., Rothwell, Gar W., Stockey, Ruth A., Hilton, Jason, Mapes, Gene, Riding, James B.

“…This study describes a specimen that extends the oldest fossil evidence of Pinus L. to the Early Cretaceous Wealden Formation of Yorkshire, UK (131-129 million…”
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Distinguishing angiophytes from the earliest angiosperms: A Lower Cretaceous (Valanginian-Hauterivian) fruit-like reproductive structure by Stockey, Ruth A, Rothwell, Gar W

“…A remarkably diverse Lower Cretaceous (Valanginian-Hauterivian) flora at Apple Bay, Vancouver Island, preserves seed plants at an important time of floristic…”
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Fossil evidence for sporeling development of a Mesozoic osmundaceous fern by Walker, Zane, Rothwell, Gar W., Stockey, Ruth A.

“…Premise An anatomically preserved fossil fern sporeling has been discovered in a Lower Cretaceous marine concretion from Vancouver Island, British Columbia,…”
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Paleontological Context for the Developmental Mechanisms of Evolution by Sanders, H, Rothwell, G.W, Wyatt, S

“…The emerging field of evolutionary developmental biology (evo‐devo) seeks to identify the specific genetic basis for plant evolution. Whereas molecular…”
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Reconstructing Emporia lockardii (Voltziales: Emporiaceae) and initial thoughts on Paleozoic conifer ecology by Hernandez-Castillo, Genaro R, Stockey, Ruth A, Rothwell, Gar W, Mapes, Gene

“…A new plant concept for the extinct conifer species Emporia lockardii (Mapes & Rothwell) Mapes & Rothwell (Emporiaceae) is developed from fossils collected at…”
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