Fossils and seed plant phylogeny reanalyzed

TitleFossils and seed plant phylogeny reanalyzed
Publication TypeJournal Article
Year of Publication1992
AuthorsDoyle JA, Donoghue MJ
JournalBrittonia
Volume44
Pagination89 - 106
ISSN0007196X
KeywordsAngiosperms, CLADISTIC analysis, FOSSIL EVIDENCE, phylogeny, PLANT SCIENCES, SEED PLANTS
Abstract

In a cladistic analysis of Recent seed plants, Loconte and Stevenson (1990) obtained results that conflict with our 1986 analysis of both extant and fossil groups and argued that fossil data had led us to incorrect conclusions. To explore this result and the general influence of fossils on phylogeny reconstruction, we assembled new “Recent” and “Complete” (extant plus fossil) data sets incorporating new data, advances in treatment of characters, and those changes of Loconte and Stevenson that we consider valid. Our Recent analysis yields only one most parsimonious tree, that of Loconte and Stevenson, in which conifers are linked with Gnetales and angiosperms (anthophytes), rather than with Ginkgo, as in our earlier Recent and Complete analyses. However, the shortest trees derived from our Complete analysis show five arrangements of extant groups, including that of Loconte and Stevenson and our previous arrangements, suggesting that the result obtained from extant taxa alone may be mis

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