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Early Flowers and Angiosperm Evolution
This work has highlighted the importance of understanding the environmental context of early angiosperm evolution in the context of extant and fossil seed plants, as well as the history and evolution of pollination in angiosperms.
Cretaceous angiosperm flowers: Innovation and evolution in plant reproduction
Molecular phylogenetic dating of asterid flowering plants shows early Cretaceous diversification.
It is shown that asterids and their major subgroups euasterids, campanulids, and lamiids diversified during the Early Cretaceous, and an origin and first phase of diversification in the EarlyCretaceous is supported.
The origin and early diversification of angiosperms
New palaeobotanical discoveries and phylogenetic analyses of morphological and molecular data have clarified the initial phases of this radiation and changed the perspective on early angiosperm evolution, though important issues remain unresolved.
Dating phylogenetically basal eudicots using rbcL sequences and multiple fossil reference points.
- C. Anderson, K. Bremer, E. M. Friis
- Environmental Science, GeographyAmerican journal of botany
- 1 October 2005
A molecular dating of the phylogenetically basal eudicots has been performed using several fossils as minimum age constraints, and the results suggest a rapid diversification during the late Early Cretaceous, with all the lineages of basal Eudicots emerging during the latest part of the EarlyCretaceous.
Early cretaceous (early to middle Albian) platanoid inflorescences associated with Sapindopsis leaves from the Potomac Group of eastern North America
Fossil evidence of water lilies (Nymphaeales) in the Early Cretaceous
The history of the water lilies (Nymphaeales) is extended back to the Early Cretaceous and into the oldest fossil assemblages that contain unequivocal angiosperm stamens and carpels, adding to the growing congruence between results from molecular-based analyses of relationships among angiosperms and the palaeobotanical record.
Diversity in obscurity: fossil flowers and the early history of angiosperms
- E. M. Friis, K. R. Pedersen, P. Crane
- Geography, Environmental SciencePhilosophical Transactions of the Royal Society B…
- 12 February 2010
Angiosperms were clearly present in the Early Cretaceous, 20–30 Myr before they attained the level of ecological dominance reflected in some mid-Cretaceous floras, and angiosperm leaves and pollen show a distinct pattern of steadily increasing diversity and complexity through this interval.
Early angiosperm diversification : The diversity of pollen associated with angiosperm reproductive structures in early Cretaceous floras from Portugal
A Reevaluation of Seed Plant Phylogeny
The results support the placement of the cycads as the sister group of a monophyletic group that includes several fossil «seed ferns» as well as extant Ginkgo, conifers, gnetopsids, and angiosperms.