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1
Morrison Symposium Proceedings
... sporangia and seeds with sarcotestas well- preserved, but many unidentifiable
tissues present seeds (at least 3 types) cuticle cycadophyte petiole cycadophyte
laminae pycnoxilic wood fern sporangia bubble wall shards MWC 2697 CaCO, ...
2
Biotic Recovery from Mass Extinction Events
In the K-T boundary tuff assemblage of the Augustovka River Section in western
Sakhalin there are two cycadophyte genera, Pterophyllum and Cycadites, giving
it a definitely Mesozoic aspect (Krassilov 1979) while Encephalartites is common
...
3
Index of Generic Names of Fossil Plants, 1820-1950: Based on ...
Oycaditea megalophyllua Buckland 1836, p. 497, pi. 60; petrified cycadophyte
trunk ; Isle of Portland, England. GYCADIUM Guillard, 1839. Cycadium
cyprinopholla Guillard, 1839, p. 129, pi. 3, Carboniferous ; Mines of Rive- de-Gier
, France.
Henry Nathaniel Andrews, 1955
4
Paleoecology of Early Jurassic Navajo Sandstone Interdune ...
The surface sculpture, the ring of silicified material, and the central empty core of
Figures 228 and 229, a Bucklandia cycadophyte, are morphologically very
similar. Figure 230 is an internal cast of a root that is similar in morphology that
the ...
Nathan Daniel Wilkens, 2008
the Cycadophyte branch is not distinguishable until the Mesozoic. Historically,
therefore, the Cordaitales must be considered as the second group of
Gymnosperms. Their connection with an ancient fern stock is evident in their
structure, but ...
6
Biology of the Sauropod Dinosaurs: Understanding the Life of ...
Co-occurrence with Major Late Jurassic Sauropod Faunas There is a wealth of
cycadophyte leaves throughout the Morrison Formation, from southern Utah to
southern Canada (Tidwell 1990b; Ash & Tidwell 1998). Pollen, on the other hand,
...
7
Geological Survey Professional Paper
Because of poor preservation, these results do not in any way preclude the
presence of cycadophyte pollen; they simply fail to establish it. One other feature
of Phasmatocycas invites close attention. Both counterparts of the holotype bear
...
8
U.S. Geological Survey professional paper
In the same paper, Bock also stated that the petiole of the form was elliptical in
cross section like a cycadophyte and had actually been collected from rocks of
Jurassic, not Triassic, age. According to Arnold (1964, p. 5), however, the stem ...
Geological Survey (U.S.), 1969
9
Bulletin - United States Geological Survey
A cycadophyte from the North American coal measures: Am. Jour. Sci., 4th ser.,
vol. 42, pp. 21-26, 2 figs., July, 1916. Eassler, Ray S. 46. Bibliographic index of
American Ordovician and 12 BIBLIOGRAPHY OF NORTH AMERICAN
GEOLOGY, ...
Geological Survey (U.S.), 1917
Late Triassic The Triassic spanned a major transition from a seed fern–
pteridophyte flora to a conifer-cycadophyte flora, particularly in the equatorial
region and southerly higher latitudes. The Early Triassic vegetation included
many forms with ...
Michael K. Brett-Surman, Thomas R. Holtz, James O. Farlow, 2012
