Abstract
This chapter reviews both systematics and ecology of the angiosperms from the Crato Formation, which are represented by members of all major angiosperm groups. These include the early-diverging ANITA grade (e.g., waterlilies, star anise), the magnoliids (e.g., magnolias, bay laurel), monocots and eudicots. The systematic composition of this assemblage is more comparable to younger assemblages from the northern mid-latitudes (Potomac zone II) dominated by eudicots than with their age equivalent (Potomac zone I) which are dominated by ANITA members and Chloranthaceae. This diachronism supports the idea of a poleward dispersal of angiosperms during the lower Cretaceous an idea already proposed by Axelrod in the 1950ss. Regarding their ecology, these angiosperms occupied the whole water and light supply, ranging from aquatic to drought-tolerant and from shade adapted to sun adapted. Nevertheless, these angiosperms were probably only herbaceous or shrubby, the conifers occupying the canopy. The systematic and ecological diversity of the angiosperms in the Crato flora shows that the radiation of angiosperms was already advanced in the tropics during the late Aptian.
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Acknowledgments
We would like to thank institutions and researchers that made this publication possible, especially B.A.R. Mohr. We would also like to thank the staff of the Museum of Natural History, Berlin, especially Hwa-Ja Götz for part of the photography. Funding was provided by the German Funding Agency (DFG) which provides the support for Clément Coiffard (Funding No. CO 1060/3-1 and CO 1060/5-1). The second author thanks CNPq (= National Council for Scientific and Technological Development) for the CNPq – 310.823 / 2016-1 Research Productivity Scholarship.
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Coiffard, C., Bernardes-de-Oliveira, M.E.C. (2020). Angiosperms in the Early Cretaceous of Northern Gondwana: A Track Record. In: Iannuzzi, R., Rößler, R., Kunzmann, L. (eds) Brazilian Paleofloras. Springer, Cham. https://doi.org/10.1007/978-3-319-90913-4_31-1
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DOI: https://doi.org/10.1007/978-3-319-90913-4_31-1
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