Hostname: page-component-586b7cd67f-r5fsc Total loading time: 0 Render date: 2024-12-02T21:33:42.941Z Has data issue: false hasContentIssue false
  • English
  • Français

XV.—On Protopitys (Göppert): with a Description of a Fertile Specimen Protopitys scotica sp. nov. From the Calciferous Sandstone Series of Dunbartonshire.*

Published online by Cambridge University Press:  06 July 2012

John Walton
John Walton
Affiliation:
University of Glasgow.
Get access Rights & Permissions [Opens in a new window]

Synopsis

A Fertile shoot of Protopitys scotica sp. nov. from the Calciferous Sandstone Series of Dunbartonshire provides the first available information about the reproductive structures of Protopitys which most authors have hitherto regarded as probably a Pteridosperm. The evidence, however, suggests that it is a plant with pteridophytic reproduction. The range in size of the spores suggests too that heterospory with two sizes of spores, megaspores and microspores, was in course of evolution. It is proposed that a new group, the Protopityales, be established to include Protopitys.

Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 63 , Issue 2 , 1958 , pp. 333 - 340
Copyright
Copyright © Royal Society of Edinburgh 1958

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

References to Literature

Endlicher, I., 1847. Synopsis Coniferarum. Sangalli.Google Scholar
Göppert, H. R., 1845. In Wimmer's Flora von Schlesien. 2nd Ed. Breslau.Google Scholar
Göppert, H. R., 1850. “Fossilen Coniferen”, Natuurk. Verh. Holland Maatsch. Wet., 6, Leiden, 229.Google Scholar
Göppert, H. R., 1853. “Fossile Flora des Übergangsgebirges”, Nova Acta Leop. Carol., 22, suppl., 299, with plates.Google Scholar
Kidston, R., and Lang, W. H., 1923. “On Palœopitys Milleri M'Nab”, Trans. Roy. Soc. Edin., 53, 409–417.CrossRefGoogle Scholar
Leclercq, S., 1951. “Etude Morph. et Anat. d'une Fougère du Dévonien Supérieur, le Rhacophyton zygopteroides”, Ann. Soc. Geol. Belg. (Mem. in 4°), 9.Google Scholar
Manton, I., 1950., Problems of Cytology and Evolution in the Pteridophyta. Cambridge.CrossRefGoogle Scholar
Posthumus, O., 1931. Catalogue of Fossil Remains described as Fern Stems and Petioles. Malang, Java.Google Scholar
Scott, D. H., 1923. Studies in Fossil Botany, 2. London.Google Scholar
Seward, A. C., 1917. Fossil Plants, 3. Cambridge.Google Scholar
Solms-Laubach, Graf zu, 1893. “Ueber die in den Kalksteinen des Kulm von Glätzisch-Falkenberg in Schlesien enthaltenen Structurbietenden Pflanzenreste”, Bot. Zeit., 51 (Abt. Ie), 197.Google Scholar
Unger, F., 1847. Chloris Protogœa. Leipzig.Google Scholar