The identity of Archaeopteris and Callixylon

@article{Beck2008TheIO,
  title={The identity of Archaeopteris and Callixylon},
  author={Charles B. Beck},
  journal={Brittonia},
  year={2008},
  volume={12},
  pages={351-368}
}
  • C. B. Beck
  • Published 15 October 1960
  • Biology, Environmental Science, Geography
  • Brittonia
Summary and ConclusionsA specimen from the late Devonian Katsberg beds of Delaware County, New York, comprising a pyritized axis determined asCallixylon and leaves determined asArchaeopteris, is described and illustrated. The leaves are probablyA. macilenta Lesquereux and the axisC. zalesskyi Arnold, but because of doubt of the specific identity of the leaves a nomenclature transfer is delayed. Archaeopteris, the valid name for the plant represented by the organ generaArchaeopteris… 

Figures from this paper

Plants of the new albany shale. II. Callixylon arnoldii Sp. Nov.
Following the comprehensive studies of Callixylon by Arnold (1930, 1931), this widespread Devonian genus became of unusual interest to morphologists because of the conspicuous similarity of its
The Early Carboniferous progymnosperm Protopitys: new data on vegetative and fertile structures, and on its geographic and stratigraphic distribution
TLDR
Recent studies support previous observations that the only genus of this order, Protopitys, included large arborescent plant with trunks up to 1 m in diameter and indicate that it was present through the whole Mississippian, from the middle Tournaisian to the Serpukhovian.
The Origins and Early Evolution of the Megaphyllous Leaf
  • J. Galtier
  • Environmental Science
    International Journal of Plant Sciences
  • 2010
TLDR
Paleobotanical data confirm that the megaphyllous leaf evolved independently several times from the Middle Devonian to the Early Carboniferous, and fundamental differences in their petiole anatomy support the early divergence of the two groups.
Givetian (Middle Devonian) cladoxylopsid ‘ferns’ from Orkney, northern Scotland
ABSTRACT Two large fossil plants are described from the Givetian (Middle Devonian) Eday Flags, South Ronaldsay, Orkney Isles, northern Scotland. Fossils with branches joined to stems of this age are
A Callixylon (Archaeopteridales, Progymnospermopsida) trunk with preserved secondary phloem from the Late Devonian of Morocco.
TLDR
The secondary phloem anatomy supports a close affinity of archaeopteridalean progymnosperms with both aneurophytalean progcynosperm and seed plants.
The diversification of early arborescent seed ferns
TLDR
A new plant that has leaf traces originating as a double strand and a petiole base of the Kalymma-type, therefore showing characteristics of calamopityan seed ferns but being quite distinct in features of the stele, secondary xylem and phloem is presented.
A New Species of Aneurophyton (Progymnospermopsida) from the Middle Devonian of West Junggar, Xinjiang, China, and Its Paleophytogeographical Significance
TLDR
This is the first formal report of Aneurophyton beyond the coasts of the Rheic Ocean and shows that West Junggar, the locality of present species of A Neurophytales, played a key role in the dispersal of ANeurophyTales in the Middle Devonian.
Archaeopteris halliana from the Late Devonian (Famennian) of Anhui Province, China
New materials from the Upper Devonian (Famennian) Wutong Formation of Chizhou District, Anhui Province, South China, allow description of fertile and sterile characters of Archaeopteris halliana.
PROGYMNOSPERMOPSIDA) TRUNK WITH PRESERVED SECONDARY PHLOEM FROM THE LATE DEVONIAN OF MOROCCO 1
TLDR
The secondary phloem anatomy supports a close affi nity of archaeopteridalean progymnosperms with both aneurophytalean progylactic lignophytes and seed plants.
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 34 REFERENCES
Classification of Gymnosperms from the Viewpoint of Paleobotany
TLDR
An altered scheme of classification of the vascular plants is proposed in which the "gymnosperms" are parceled among three classes in accordance with affinities as suggested by their origin.
A NEW ROOT SPECIES OF CALLIXYLON
TLDR
The writer was fortunate in discovering well-preserved roots in material collected from three localities in the Finger Lakes region of New York: C. marshii, C. whiteanum and C. mentethense have been described from nothing more than fragments of secondary xylem, and the possibility exists that they are root species.
On the Microsporangia of the Pteridospermeae, with Remarks on Their Relationship to Existing Groups
In the month of June last, I communicated to this Society a “Preliminary Note on the Occurrence of Microsporangia in Organic Connection with the Foliage of Lyginodendron.” In the present paper I
The Classification of Vascular Plants.
  • E. Berry
  • Environmental Science, Geography
    Proceedings of the National Academy of Sciences of the United States of America
  • 1917
Cycadales Cycadeoidales Coniferopsida Ginkgoales Coniferales Gnetopsida Angeospermopsida Divisions 1. Rhyniophyta (extinct plants, e.g. Rhynia, Cooksonia) 2. Zosterophyllophyta (extinct plants, e.g.
On fossil plants, showing structure, from the base of the waverley shale of kentucky
A large part of the material upon which the present memoir is based was derived from Prof. Charles Eastman, now of the University of Pittsburg but formerly of the staff of the Agassiz Museum of
STRUCTURE AND RELATIONSHIPS OF SOME MIDDLE DEVONIAN PLANTS FROM WESTERN NEW YORK
TLDR
Six structurally preserved forms are now known from the Hamilton group, including Reimannia, which was first described from the Ludlowville shale at Alden, but has since been recognized in the New Albany shale in Kentucky (Read and Campbell, 1939).
XV.—On Protopitys (Göppert): with a Description of a Fertile Specimen Protopitys scotica sp. nov. From the Calciferous Sandstone Series of Dunbartonshire. *
TLDR
The evidence suggests that Protopitys is a plant with pteridophytic reproduction, and the range in size of the spores suggests that heterospory with two sizes of spores, megaspores and microspores, was in course of evolution.
Connection between Archaeopteris and Callixylon
Characters of two Upper Devonian genera, Archaeopteris, often considered to be a fern, and Callixylon, classified with the gymnosperms, have been recognized in a single specimen.
Étude morphologique et anatomique d'une fougère du Dévonien supérieur : le Rhacophyton zygopteroides nov. sp.
En 1937, j'ai eu la bonne fortune de decouvrir un gisement fossilifere dans le Devonien superieur qui a livre de belles empreintes de fougere se rapportant au genre Rhacophyton Crepin. Fort
...
1
2
3
4
...