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}
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… 
Diversity of Ancient Conifers: The Jurassic Seed Cone Bancroftiastrobus digitata gen. et sp. nov. (Coniferales)
A third genus of anatomically preserved conifer seed cones has been recognized from a Late Jurassic deposit in northeastern Scotland, providing additional evidence for the diversity of stem group conifers that lived during the interval when most crown group conifer families originated.
Cheirolepidiaceous diversity: an anatomically preserved pollen cone from the Lower Jurassic of southern Victoria Land, Antarctica.
Abstract To date, the vast majority of fossils described for the extinct conifer family, the Cheirolepidiaceae, have been reported from compression/impressions primarily from Cretaceous rocks; there
Additional evidence for the Mesozoic diversification of conifers: Pollen cone of Chimaerostrobus minutus gen. et sp. nov. (Coniferales), from the Lower Jurassic of Antarctica
Light is shed on the complexity of pollen cone evolution and the diversity of conifers that were evolving during the Late Triassic and Early Jurassic.
Greater palaeobiodiversity in conifer seed cones in the Upper Jurassic Morrison Formation of Utah, USA
Although fossil conifer wood, leaves, and pollen have been known from the Upper Jurassic Morrison Formation of the Western Interior of North America for many decades, only a few conifer seed cones
X-ray Synchrotron Microtomography of a silicified Jurassic Cheirolepidiaceae (Conifer) cone: histology and morphology of Pararaucaria collinsonae sp. nov.
This fossil develops the understanding of the dominant tree element of the Purbeck Fossil Forest, providing the first evidence for ovulate cheirolepidiaceous cones in Europe, and significantly extends the known palaeogeographic range of Pararaucaria, supporting a mid-palaeolatitudinal distribution in both Gondwana and Laurasia during the Late Jurassic.
A new Cheirolepidiaceae conifer Watsoniocladus cunhae sp. nov. from the Early Cretaceous (late Aptian–early Albian) of western Portugal
Abstract A new cheirolepidiaceous conifer Watsoniocladus cunhae sp. nov. J.Kvacek et M.M.Mendes is described from the Early Cretaceous of Catefica in the Lusitanian Basin, Estremadura region, western
Araucarian woodlands from the Jurassic of Patagonia, taphonomy and paleoecology
  • N. Cúneo
  • Geology
    Journal of South American Earth Sciences
  • 2021
Abstract The structure and taphonomy of araucarian stumps and logs from the Jurassic of Patagonia are analyzed. Density measurements of these trees indicate that they were organized into woodlands
Middle-Late Jurassic megaflora of Laguna Flecha Negra locality in Santa Cruz Province, Patagonia, and floristic assemblages of the Bahía Laura Complex
Abstract A Middle-Late Jurassic fossil plant assemblage is described from the Bahia Laura Complex at the Laguna Flecha Negra locality, Santa Cruz Province. The fossil assemblage is autochthonous,
High-precision U–Pb geochronology and a new chronostratigraphy for the Cañadón Asfalto Basin, Chubut, central Patagonia: Implications for terrestrial faunal and floral evolution in Jurassic
Abstract The fluvial, lacustrine and tuffaceous sedimentary succession of the Canadon Asfalto continental basin exposed in the Argentinean Chubut Province of central Patagonia preserves an


Pollen cone anatomy of Classostrobus crossii sp. nov. (Cheirolepidiaceae)
Abstract Discovery of a permineralized fossil cone in Mesozoic deposits of southern England provides an opportunity to document the first detailed evidence of internal pollen cone anatomy for the
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.
On the basis of anatomical and morphological features, specimens of P. patagonica are compared to members of both extant and extinct families of conifers including the Araucariaceae, Taxodiaceae, Pinaceae, Cupressaceae, and Cheirolepidaceae.
Structure and relationships of the Jurassic conifer seed cone Hughmillerites juddii gen. et comb. nov.: Implications for the origin and evolution of Cupressaceae
Developmental studies of living cupressaceous seed cones indicate that the range of mature morphologies is strongly correlated with differences in the timing and rate of development for the bract, scale, and ovules, thus supporting the hypothesis that heterochrony plays a major role in the evolution of bract/scale form.
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.
The structure and phylogenetic significance of the conifer Pseudohirmerella delawarensis nov. comb. from the Upper Triassic of North America
It is likely that the supposed seeds or arils of Pseudohirmerella are actually casts of empty, seed-bearing depressions, which indicates a substantial, but mostly undocumented, Triassic diversification of the Cheirolepidiaceae.
Coniferous Ovulate Cones from the Lower Cretaceous of Santa Cruz Province, Argentina
These Patagonian cone scales appear to have some of the most ancestral characters in the family, and show that at that time, the taxodiaceaous Cupressaceae and the Cheirolepidiaceae still were well represented in southern South America.
The Conifer Frenelopsis ramosissima (Cheirolepidiaceae) in the Lower Cretaceous of Texas: Systematic, Biogeographical, and Paleoecological Implications
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.
Seed cone anatomy of Cheirolepidiaceae (Coniferales): reinterpreting Pararaucaria patagonica Wieland.
Pararaucaria patagonica is assigned to Cheirolepidiaceae, documenting anatomical features for seed cones of the family and providing evidence for the antiquity of pinoid conifers leading to the origin of Pinaceae.
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.