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A new species of Pityostrobus from the Lower Cretaceous of California and its bearing on the evolution of Pinaceae.
Download2001
A single cylindrical, abraded cone specimen has been found associated with ammonites of the Lower Cretaceous Budden Canyon Formation near Ono, California. The specimen was embedded in bioplastic and sectioned using the cellulose acetate peel technique. The pith is composed of parenchyma and...
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A new voltzialean conifer, Emporia royalii sp nov. (Emporiaceae), from the Hamilton Quarry, Kansas.
Download2009
Stockey, R.A., Rothwell, G.W., Hernandez-Castillo, G.R., Mapes, G.
A new species of extinct conifer plants, Emporia royalii sp. nov. Hernandez-Castillo, Stockey, Mapes et Rothwell (Emporiaceae: Voltziales), is described from the rich fossil biota of the Late Pennsylvanian, Hamilton Quarry, Kansas. This conifer has lateral plagiotropic branches with simple and...
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Anatomically Preserved Williamsonia (Williamsoniaceae): Evidence for Bennettitalean Reproduction in the Late Cretaceous of Western North America
Download2003
An anatomically preserved ovulate cycadeoid cone has been discovered in Upper Cretaceous (Campanian) sediments of Vancouver Island, British Columbia, Canada. The specimen is preserved by calcareous cellular permineralization and displays diagnostic features of the genus Williamsonia Carruthers....
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Anatomically preserved Cycadeoidea (Cycadeoidaceae), with a reevaluation of systematic characters for the seed cones of Bennettitales
Download2002
Four anatomically preserved ovulate cycadeoid cones have been recovered from three localities in Upper Cretaceous (Turonian/ Coniacian-Late Campanian) sediments of Vancouver and Hornby Islands, British Columbia, Canada. All of the specimens are preserved by calcareous cellular permineralization...
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Beardia vancouverensis gen. et sp. nov. (Juglandaceae): Permineralized fruits from the Eocene of British Columbia
Download2006
Mindell, R.A., Stockey, R.A., Elliott, L.L.
Large numbers of permineralized juglandaceous fruits were identified in calcareous nodules from the Eocene Appian Way locality on Vancouver Island, British Columbia, Canada. The fruits, small dorsiventrally flattened nutlets, 4.5–7.0 mm long and 5.5–9.0 3 3–5 mm in diameter, were studied using...
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Cardstonia tolmanii gen. et sp. nov. (Limnocharitaceae) from the Upper Cretaceous of Alberta, Canada.
Download2004
Several new broad-leaved monocots were identified in gray siltstones and fine-grained sandstones from the Upper Cretaceous (Campanian-Maastrichtian) St. Mary River Formation near Cardston, Alberta, Canada. Specimens are compression/impressions of long-petiolate aquatic plants that were probably...
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Cobbania corrugata (Lesquereux) comb. nov. (Araceae): A floating aquatic aroid from the Upper Cretaceous of western North America
Download2007
Stockey, R.A., Johnson, K., Rothwell, G.W.
The fossil record of aquatic flowering plants broadens our understanding of their former diversity and origins from terrestrial ancestors. This paper describes a floating aquatic monocot from 71 whole plants and several isolated leaf fragments from Upper Cretaceous oxbow lake sediments in the...
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Distinguishing angiophytes from the earliest angiosperms: A Lower Cretaceous (Valanginian-Hauterivian) fruit-like reproductive structure
Download2009
A remarkably diverse Lower Cretaceous (Valanginian-Hauterivian) fl ora at Apple Bay, Vancouver Island, preserves seed plants at an important time of fl oristic evolutionary transition, about the same time as the earliest fl owering plant megafossils. The fossils are permineralized in carbonate...
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Evidence for sympodial vascular architecture in a filicalean fern rhizome: Dickwhitea allenbyensis gen. et sp. nov. (Athyriaceae).
Download2006
Rothwell, G.W., Stockey, R.A., Nishida, H., Karafit, S.J.
A new genus and species of anatomically preserved fossil filicalean ferns Dickwhitea allenbyensis gen. et sp. nov. is described from the Middle Eocene Princeton Chert of southern British Columbia, Canada. Rhizomes have a parenchymatous pith surrounded by a ring of five amphiphloic cauline bundles...
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Growth Architecture of Thucydia mahoningensis, a Model for Primitive Walchian Conifer Plants.
Download2003
Stockey, R.A., Mapes, G., Hernandez‐Castillo, G.R., Rothwell, G.W.
A large number of vegetative and fertile branching systems of Thucydia mahoningensis provide data for interpreting the growth architecture and life-history pattern of a primitive Paleozoic conifer. Internal anatomy is similar to modern conifers, indicating an arborescent life-history pattern....