Mesozoic seed ferns: Old paradigms, new discoveries1

  title={Mesozoic seed ferns: Old paradigms, new discoveries1},
  author={Edith L. Taylor and Thomas N. Taylor and Hans Kerp and Elizabeth J. Hermsen},
Abstract Taylor, E. L., T. N. Taylor (Department of Ecology and Evolutionary Biology, and Natural History Museum and Biodiversity Research Center, 1200 Sunnyside Ave., University of Kansas, Lawrence, KS 66045), H. Kerp (Forschungsstelle für Paläobotanik, Westfälische Wilhelms-Universität Münster, Hindenburgplatz 57, D-48143 Münster, Germany), and E.J. Hermsen (Department of Ecology and Evolutionary Biology, and Natural History Museum and Biodiversity Research Center, 1200 Sunnyside Ave… 

A century of seed ferns: Introduction to the symposium

The recognition by Oliver and Scott (1904) may well have been the single most important element ushering in a new era of botanical inquiry by placing fossils at the center of plant phylogenetic studies.

Pteridosperms are the backbone of seed-plant phylogeny1

These five extant groups were embedded in the derived half of a morphologically diverse spectrum of extinct taxa that strongly influenced tree topology and elucidated patterns of acquisition of morphological character-states, demonstrating that pteridosperms and other more derived “stem-group” Gymnosperms are critical for understanding seed-plant relationships.

A review of permineralized seed fern stems of the Upper Paleozoic

Stem morphotaxa continue to be the primary line of evidence for pteridosperm phylogenetic analyses, and the current state of the authors' knowledge of Upper Paleozoic permineralized medullosan and manoxylic lyginopterid stems is reviewed here.

Seed ferns from the late Paleozoic and Mesozoic: Any angiosperm ancestors lurking there?

It is concluded that, in the case of these seed plants, phylogenetic analysis techniques have surpassed the hard data needed to formulate meaningful phylogenetic hypotheses.

Early Permian Flora, Doña Ana Mountains, Southern New Mexico, with Special Consideration of Taxonomic Issues and Arthropod Damage

Plant fossils were collected from nine sites, and noted at several others, in Lucero Arroyo and its immediate tributaries in the Doña Ana Mountains, north of Las Cruces, in southern New Mexico. The


ABSTRACT Continental Triassic sequences in Antarctica are among the most continuous and best represented in Gondwana. Triassic fossil plants have been collected sporadically from Antarctica since the

Systematics and Paleoecology of a New Peltaspermalean Seed Fern from the Triassic Polar Vegetation of Gondwana

It is suggested that the matatiellacean peltasperms were opportunistic, early successional plants that were particularly successful in colonizing stressed wetland environments in polar latitudes during the Triassic.

Distinguishing angiophytes from the earliest angiosperms: A Lower Cretaceous (Valanginian-Hauterivian) fruit-like reproductive structure.

They show that nearly total ovule enclosure, a level of organization approaching angiospermy, was achieved by advanced seed ferns during the Mesozoic, and include tetrahedral seeds within cupule- or carpel-like structures.



Lepidopteris callipteroides, an earliest Triassic seed fern of the Sydney Basin, southeastern Australia

Earliest Triassic shales in the Coal Cliff Sandstone, Caley Formation, Widden Brook Conglomerate and Dooralong Shale (all basal Narrabeen Group) of the Sydney Basin contain a low diversity fossil

Origin of Angiosperms

In the apparent absence of critical fossil evidence, ideas on the origin of angios­ perms have been based largely on comparative morphology of modern plants, including Axelrod's theory that the angiosperms originated and began to diversify extensively in tropical upland areas as early as the Permian or Triassic.

VII. On some pteridospermous plants from the Mesozoic rocks of South Africa

A group of plants whose leaves have been known for a long time under the names of Thinnfeldia and Lepidopteris are dealt with, showing evidence that these somewhat fern-like leaves belonged to seed-bearing plants.

Enigmatic gymnosperms? Structurally preserved Permian and Triassic seed ferns from Antarctica

  • E. Taylor
  • Geography, Environmental Science
  • 1996

The Caytoniales, a New Group of Angiospermous Plants from the Jurassic Rocks of Yorkshire

The study of fossil plants during the last quarter of a century has revealed a vast amount of information about the past history of many modern plant types. But while we have learned much about the

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.

Studies on triassic fossil plants from Argentina, I. Rhexoxylon from the Ischigualasto formation

The present record from Triassic strata in north-west Argentina is the first occurrence of Rhexoxylon outside Africa and supports a stratigraphical correlation of the beds (Ischigualasto Formation) with the Stormberg Series of South Africa.

Seed Plant Phylogeny and the Relationships of Gnetales

  • J. Doyle
  • Biology
    International Journal of Plant Sciences
  • 1996
Results imply that glossophytes originally had glossopterid-like leaves and bract-sporophyll complexes, which were transformed into carpels with bitegmic ovules in angiosperms, but reduced to single, terminal Ovules in Gnetales; flowers arose independently in the two lines.