ERA

Download the full-sized PDF of Combining Characters of Pteridaceae and Tree Ferns: Pterisorus Radiata gen. et sp. nov., A Permineralized Lower Cretaceous Filicalean with Radial SoriDownload the full-sized PDF

Analytics

Share

Permanent link (DOI): https://doi.org/10.7939/R3ZG6GJ32

Download

Export to: EndNote  |  Zotero  |  Mendeley

Communities

This file is in the following communities:

Biological Sciences, Department of

Collections

This file is in the following collections:

Journal Articles (Biological Sciences)

Combining Characters of Pteridaceae and Tree Ferns: Pterisorus Radiata gen. et sp. nov., A Permineralized Lower Cretaceous Filicalean with Radial Sori Open Access

Descriptions

Author or creator
Rothwell, G. W.
Stockey, R. A
Additional contributors
Subject/Keyword
fossils
filicalean fern
Cyatheaceae
Pteridaceae
Type of item
Journal Article (Published)
Language
English
Place
Time
Description
An anatomically preserved leptosporangiate filicalean that combines characters of the Pteridaceae and tree ferns has been discovered in the Lower Cretaceous (Valanginian-Hauterivian boundary) Apple Bay flora on Vancouver Island, Canada. Exindusiate sori are radial, with numerous annulate sporangia diverging from a conical receptacle that is positioned below a pinnule vein. No paraphyses or other trichomes are present. Sporangia have a nearly vertical annulus that is not interrupted by the long, quadriseriate stalk. Spores are trilete and angular, with a distinctive equatorial flange and a distal deltoid structure that contacts the rim at the corners of the spore. The suture extends three-fourths of the distance to the margin and is flanked by prominent ridges. Spore walls consist of two dense layers, and the surface is psilate. Pterisorus radiata gen. et sp. nov. has characters that are reminiscent of both tree ferns and the most highly derived of modern species, providing direct evidence for the third major radiation of Filicales.
Date created
2006
DOI
doi:10.7939/R3ZG6GJ32
License information
Rights
Copyright 2006 by The University of Chicago
Citation for previous publication
Rothwell, G. W., & Stockey, R. A. (2006). COMBINING CHARACTERS OF PTERIDACEAE AND TREE FERNS : PTERISORUS RADIATA GEN . ET SP . NOV ., A PERMINERALIZED LOWER CRETACEOUS FILICALEAN WITH RADIAL SORI. International Journal of Plant Sciences, 167(3), 695-701.
Source
Link to related item

File Details

Date Uploaded
Date Modified
2014-05-02T17:53:00.354+00:00
Audit Status
Audits have not yet been run on this file.
Characterization
File format: pdf (Portable Document Format)
Mime type: application/pdf
File size: 714005
Last modified: 2015:10:12 17:53:19-06:00
Filename: IJOPS_167_2006_695.pdf
Original checksum: 42568d802d6edd96e6aff15de37843c1
Well formed: false
Valid: false
Status message: Unexpected error in findFonts java.lang.ClassCastException: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject cannot be cast to edu.harvard.hul.ois.jhove.module.pdf.PdfDictionary offset=1416
Status message: Invalid Annotation list offset=2595
File title: Combining Characters of Pteridaceae and Tree Ferns: <italic>Pterisorus radiata</italic> gen. et sp. nov., a Permineralized Lower Cretaceous Filicalean with Radial Sori
File language: en
Activity of users you follow
User Activity Date