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New perspectives on the Mesozoic seed fern order Corystospermales based on attached organs from the Triassic of Antarctica.
Phylogenetic analysis suggests that the corystosperm cupule is an unlikely homologue for the angiosperm carpel or outer integument, and studies that treat Dicroidium leaf morphospecies as proxies for biological species of entire plants should be reconsidered. Expand
A new genus of the Cupressaceae (sensu lato) from the Jurassic of Patagonia: Implications for conifer megasporangiate cone homologies
This conifer possesses a combination of characters indicating placement within the basal Cupressaceae ( i.e. the former “Taxodiaceae”) and is supported by a phylogenetic analysis that places the Argentinean fossil close to the extant genera Athrotaxis and Cunninghamia and the fossil genera Elatides and Sewardiodendron. Expand
Atmospheric paleo-CO2 estimates based on Taxodium distichum (Cupressaceae) fossils from the Miocene and Pliocene of Eastern North America
Abstract Neogene atmospheric paleo-CO2 estimates based on fossils of the extant cupressaceous conifer species Taxodium distichum from the Brandywine Formation of Maryland and the Citronelle FormationExpand
Whole-Plant Concept and Environment Reconstruction of a Telemachus Conifer (Voltziales) from the Triassic of Antarctica
Owing to the large amount and often exquisite preservation of the material, this conceptual whole-plant genus represents one of the most completely reconstructed ancient conifer taxa to date. Expand
A Triassic Lagerstätte from eastern North America
The oldest definitive records for three orders of insect and numerous families and super families are reported, and the flora is shown to contain an unusual diversity of forms, some of which have only been previously reported either from Europe or the Southern Hemisphere. Expand
Cuticles of Mariopteris occidentalis White nov. emend. from the Middle Pennsylvanian of Oklahoma (USA), and a new type of climber hook for mariopteroid pteridosperms.
Cuticles of Mariopteris occidentalis are described from the Desmoinesian (Middle Pennsylvanian) of Oklahoma (USA) and some features are considered with regard to their palaeoautecological significance where they are interpreted as adaptations to special physiological requirements of a vine- to liana-like life form. Expand
The Conifer Frenelopsis ramosissima (Cheirolepidiaceae) in the Lower Cretaceous of Texas: Systematic, Biogeographical, and Paleoecological Implications
Analysis of the new Texas fossils refutes or seriously challenges many widely accepted hypotheses regarding the biogeography, structure, and paleoecology of F. ramosissima, which can no longer be considered a Potomac Group–endemic taxon. Expand
The "New Approach to Corystospermales" and the Antarctic Fossil Record: A Critique
Resumen. LA “NUEVA PROPUESTA PARA EL ORDEN CORYSTOSPERMALES” Y EL REGISTRO FOSIL EN LA ANTARTIDA: UNA CRITICA. El orden Corystospermales, reconocido grupo de pteridospermas mesozoicas, ha sidoExpand
The Enigmatic Paleozoic plants Spermopteris and Phasmatocycas reconsidered.
The ovule-bearing leaves now known as Spermopteris coriacea are proposed to be named as a new species of Phasmatocycas, which is less cycad-like than previously thought, and the phylogenetic position of the genus is unclear. Expand
The structure and phylogenetic significance of the conifer Pseudohirmerella delawarensis nov. comb. from the Upper Triassic of North America
It is likely that the supposed seeds or arils of Pseudohirmerella are actually casts of empty, seed-bearing depressions, which indicates a substantial, but mostly undocumented, Triassic diversification of the Cheirolepidiaceae. Expand