Pararaucaria carrii sp. nov., Anatomically Preserved Evidence for the Conifer Family Cheirolepidiaceae in the Northern Hemisphere

  title={Pararaucaria carrii sp. nov., Anatomically Preserved Evidence for the Conifer Family Cheirolepidiaceae in the Northern Hemisphere},
  author={Ruth A. Stockey and Gar W Rothwell},
  journal={International Journal of Plant Sciences},
  pages={445 - 457}
  • R. StockeyG. Rothwell
  • Published 1 March 2013
  • Environmental Science
  • International Journal of Plant Sciences
A cylindrical permineralized conifer seed cone has been identified from the Officer Member of the Trowbridge Formation, near Izee, in east-central Oregon. The cone is preserved in a Middle Jurassic (Callovian) marine calcium carbonate concretion, associated with araucarian seed cones, conifer twigs and wood, cycad seeds, fern rachides, and lycopodialean remains and was prepared by the cellulose acetate peel technique. The specimen is abraded, 2.8 cm long and 1.3 cm wide, and consists of a cone… 

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X-ray Synchrotron Microtomography of a silicified Jurassic Cheirolepidiaceae (Conifer) cone: histology and morphology of Pararaucaria collinsonae sp. nov.

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Pararaucaria delfueyoi sp. nov. from the Late Jurassic Cañadón Calcáreo Formation, Chubut, Argentina: Insights into the Evolution of the Cheirolepidiaceae

The discovery of 16 cylindrical conifer seed cones at the Estancia Vilán locality in the Late Jurassic Cañadón Calcáreo Formation of Chubut Province, Patagonia, Argentina, provides anatomically preserved specimens, allowing for the description of a second species of Pararaucaria (Cheirolepidiaceae), similar in general features to the type species, but has a specifically diagnostic combination of characters.


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A New Species of Pityostrobus from the Lower Cretaceous of California and Its Bearing on the Evolution of Pinaceae

A phylogenetic analysis using morphological data from the ovulate cones of all the extant and fossil taxa of Pinaceae, as well as those of Cryptomeria japonica, Sciadopitys verticillata, and Pararaucaria patagonica, was done and the idea that Pityostrobus represents an artificial assemblage of pinaceous taxa is supported by the analyses.

Coniferous Ovulate Cones from the Lower Cretaceous of Santa Cruz Province, Argentina

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The Conifer Frenelopsis ramosissima (Cheirolepidiaceae) in the Lower Cretaceous of Texas: Systematic, Biogeographical, and Paleoecological Implications

  • B. AxsmithB. Jacobs
  • Environmental Science, Geography
    International Journal of Plant Sciences
  • 2005
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.

Permineralized Pine Cones from the Cretaceous of Vancouver Island, British Columbia

Two abraded, cylindrical cone specimens found in calcareous concretions from the Cretaceous Spray Formation of Vancouver Island, British Columbia, were sectioned using the cellulose acetate peel technique and characterized anatomically, providing further evidence that the Pinaceae, like the angiosperms, were undergoing a rapid CRETaceous radiation.