Ryberg, Patricia E.; Rothwell, Gar W.; Stockey, Ruth A.; Hilton, Jason; Mapes, Gene; Riding, James B.(University of Chicago Press, 2012-10)
This study describes a specimen that extends the oldest fossil evidence of Pinus L. to the Early Cretaceous Wealden Formation of Yorkshire, UK (131-129 million years ago), and prompts a critical reevaluation of criteria ...
Rothwell, Gar W.; Mapes, Gene; Stockey, Ruth A.; Hilton, Jason(Botanical Society of America, 2012-04)
Premise of the study: Pinaceae and nonpinoid species are sister groups within the conifer clade as inferred from molecular systematic comparisons of living species and therefore should have comparable geological ages. Ho ...
