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Morphological Phylogenetic Analysis of Basal Angiosperms: Comparison and Combination with Molecular Data
Combined analyses of morphological and molecular data generally yield the same topologies as molecular analyses, but morphology overcomes weak molecular evidence in indicating that Chloranthaceae belong just above the basal grade, that monocots are related to Piperales, and that Lauraceae are linked with Hernandiaceae. Expand
Sources of error and confidence intervals in estimating the age of angiosperms from rbcL and 18S rDNA data.
Approximate 95% confidence intervals on ages are wider for rbcL than 18S, ranging up to 160 my for phylogenetic uncertainty, 90 my for substitutional noise, and 70 my for lineage effects, as well as some estimates from previous molecular studies. Expand
Seed ferns and the origin of angiosperms
Analysis of a critically revised morphological data set for seed plants indicates that trees in which Gnetales are nested in conifers, as in molecular analyses, are almost as parsimonious as those inWhich G netales are linked with angiosperms, suggesting that the molecular arrangement should be accepted. Expand
Angiosperm pollen zonation of the continental Cretaceous of the Atlantic coastal plain and its application to deep wells in the Salisbury embayment
Abstract This paper presents and illustrates an informal palynological zonation of the pre‐Magothy continental Cretaceous sediments of the Atlantic Coastal Plain (Potomac Group, Raritan Formation),Expand
Reconstructing the ancestral angiosperm flower and its initial specializations.
This work evaluates early floral evolution in angiosperms by parsimony optimization of morphological characters on phylogenetic trees derived from morphological and molecular data and indicates that the simple flowers of the newly recognized basal groups are reduced rather than primitively simple. Expand
Hydatellaceae identified as a new branch near the base of the angiosperm phylogenetic tree
It is shown that Hydatellaceae, a small family of dwarf aquatics that were formerly interpreted as monocots, are instead a highly modified and previously unrecognized ancient lineage of angiosperms, indicating that water lilies are part of a larger lineage that evolved more extreme and diverse modifications for life in an aquatic habitat than previously recognized. Expand
Seed plant phylogeny and the origin of angiosperms: An experimental cladistic approach
The results raise the possibility that many features considered key adaptations in the origin and rise of angiosperms were actually inherited from their gymnospermous precursors, and the morphological diversity of Mesozoic anthophytes could provide critical tests of relationships. Expand
Early cretaceous fossil evidence for angiosperm evolution
Comparisons of dated pollen floras of other regions indicate that one major subgroup of angiosperms, tricolpate-producing dicots (i.e., excluding Magnoliidae of Takhtajan) originated in the Aptian of Africa-South America at a time of increasing aridity and migrated poleward into Laurasia and Australasia. Expand