Macroevolutionary changes in the fossil plant record: Key examples from the Cretaceous-Paleogene of Patagonia, Argentina

2021 ◽  
pp. 103250
Author(s):  
Maria A. Gandolfo ◽  
Maria C. Zamaloa
Keyword(s):  
Fossil Plant

CLEAN CUTICLE OR CLEARED LEAF – FOSSIL PLANT LEAF PREPARATION METHODS FOR PCO2 RECONSTRUCTION

2020 ◽  
Author(s):  
Jiaqi Liang ◽  
◽  
Kevin Burke ◽  
Liang Xiao ◽  
Qin Leng ◽  
...  
Keyword(s):  
Fossil Plant ◽  
Preparation Methods ◽  
Plant Leaf

New occurrence of Periastron reticulatum Unger emend. Beck, an enigmatic Mississippian fossil plant

1995 ◽  
Vol 69 (2) ◽  
pp. 388-392 ◽  
Author(s):  
Robert A. Gastaldo
Keyword(s):  
Southern Appalachians ◽  
Fossil Plant ◽  
Anatomical Features

Two new specimens of Periastron reticulatum Unger emend. Beck have been collected from the Erin Slate, Talladega Slate Belt, southern Appalachians. Preserved anatomical features provide a basis for an expanded understanding of the genus and provide a biostratigraphic basis for dating the uppermost unit of the Talladega Slate Belt.

scholarly journals On medullosa pusilla

1914 ◽  
Vol 87 (594) ◽  
pp. 221-228 ◽  
Keyword(s):  
Fossil Plant ◽  
Important Respect ◽  
The Subject

In the second edition of my ‘Studies in Fossil Botany,ʼ I referred in the following words to the fossil plant which forms the subject of this notice. “A very small Medullosa (named provisionally Medullosa pusilla ), the stem with the leaf-bases not exceeding 2 cm. in diameter, has since been found by Mr. P. Whalley, of Colne, Lancashire. The stem has three steles, and agrees very closely with M . anglica , except in size.”* In order to clear the ground for other observers, it now seems desirable to give some further account of this fossil, with the necessary illustrations. Though the plant differs in no important respect from the now well-known species M . anglica , it is of some interest, as probably the smallest Medullosa on record.

The Fine Structure of Fossil Plant Cell Walls

Science ◽  
1984 ◽  
Vol 225 (4662) ◽  
pp. 621-623 ◽  
Author(s):  
E. L. SMOOT ◽  
T. N. TAYLOR
Keyword(s):  
Fine Structure ◽  
Plant Cell ◽  
Cell Walls ◽  
Plant Cell Walls ◽  
Fossil Plant

A fossil record of land plant origins from charophyte algae

Science ◽  
2021 ◽  
Vol 373 (6556) ◽  
pp. 792-796 ◽  
Author(s):  
Paul K. Strother ◽  
Clinton Foster
Keyword(s):  
Fossil Record ◽  
Evolutionary History ◽  
Phylogenetic Signal ◽  
Land Plant ◽  
Fossil Plants ◽  
Fossil Plant ◽  
Molecular Phylogenetic ◽  
History Of ◽  
Time Gap ◽  
Evolutionary Continuity

Molecular time trees indicating that embryophytes originated around 500 million years ago (Ma) during the Cambrian are at odds with the record of fossil plants, which first appear in the mid-Silurian almost 80 million years later. This time gap has been attributed to a missing fossil plant record, but that attribution belies the case for fossil spores. Here, we describe a Tremadocian (Early Ordovician, about 480 Ma) assemblage with elements of both Cambrian and younger embryophyte spores that provides a new level of evolutionary continuity between embryophytes and their algal ancestors. This finding suggests that the molecular phylogenetic signal retains a latent evolutionary history of the acquisition of the embryophytic developmental genome, a history that perhaps began during Ediacaran-Cambrian time but was not completed until the mid-Silurian (about 430 Ma).

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