Journal ArticleDOI
Paleoochna tiffneyi gen. et sp. nov. (Ochnaceae) from the late paleocene almont/beicegel creek flora, North Dakota, USA
Stefanie M. Ickert-Bond,Stefanie M. Ickert-Bond,Kathleen B. Pigg,Melanie L. DeVore,Melanie L. DeVore +4 more
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Paleoochna corroborates the presence of Ochna-like plants by the Paleogene in North America and suggests that some families within Malpighiales were well established in the Western Interior Basin of North America by the late Paleocene.Abstract:
Premise of research. Paleoochna tiffneyi gen. et sp. nov. is described from late Paleocene fossil fruits from Almont (Morton County) and Beicegel Creek (McKenzie County), North Dakota. On the basis of distinctive anatomical and morphological features, these fruits demonstrate strong taxonomic affinities to Ochna and other members of the family Ochnaceae but are distinct at the generic level.Methodology. Fossil fruits were studied with a combination of transmitted and reflected light microscopy from fractured surfaces and with scanning electron microscopy. Extant fruits were sectioned by freehand sectioning with a razor blade and studied with reflected and transmitted light microscopy.Pivotal results. The study documents the first known occurrence of Ochnaceae fruits in the fossil record. They occur as late Paleocene specimens from the Williston Basin of the Western Interior of North America. Specimens are anatomically preserved and provide critical morphological details of systematic value. Like many of t...read more
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Journal ArticleDOI
Water supply and demand remain coordinated during breakdown of the global scaling relationship between leaf size and major vein density.
Julio V. Schneider,Julio V. Schneider,Jörg Habersetzer,Renate Rabenstein,Jens Wesenberg,Karsten Wesche,Karsten Wesche,Georg Zizka,Georg Zizka +8 more
TL;DR: This study demonstrates that shortening the major vein-stomata distance is economically not less advantageous than by increasing minor vein density, as illustrated by the same degree of coordination between vein and stomatal densities and the similar construction costs across networks with dense 2° veins and those with 'normally' spaced 2° vein.
Notes on the taxonomy and distribution of the Ochnaceae in the
TL;DR: Iturralde et al. as discussed by the authors presented a taxonomy and distribution of the Ochnaceae in the Greater Antilles, including the genera Sauvagesia and Ouratea.
Journal ArticleDOI
The mid-Paleocene fruit and seed flora from the Fort Union Formation of Newell’s Nook, southeastern Montana, USA
TL;DR: The Newell's Nook biota of the Tongue River Member of the Fort Union Formation, southeastern Montana, is best known for its early Tiffanian mammalian fauna as discussed by the authors .
Book ChapterDOI
The Paleocene–Eocene Thermal Maximum: Plants as Paleothermometers, Rain Gauges, and Monitors
TL;DR: In this article, a field trip to western North America during the Paleocene-Eocene Thermal Maximum (PETM) some 56 million years ago is described, where plant-and animal fossils were discovered in the warmest interval of the last 500 million years, a condition that lasted only 200,000 years.
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Journal Article
An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants. {APG} {III}
Journal ArticleDOI
Angiosperm phylogeny: 17 genes, 640 taxa
Douglas E. Soltis,Stephen A. Smith,Nico Cellinese,Kenneth J. Wurdack,David C. Tank,Samuel F. Brockington,Nancy F. Refulio-Rodriguez,Jay B. Walker,Michael J. Moore,Barbara S. Carlsward,Charles D. Bell,Maribeth Latvis,Maribeth Latvis,Sunny Crawley,Chelsea Black,Diaga Diouf,Zhenxiang Xi,Catherine A. Rushworth,Matthew A. Gitzendanner,Matthew A. Gitzendanner,Kenneth J. Sytsma,Yin Long Qiu,Khidir W. Hilu,Charles C. Davis,Michael J. Sanderson,Reed S. Beaman,Richard G. Olmstead,Walter S. Judd,Michael J. Donoghue,Pamela S. Soltis +29 more
TL;DR: It is confirmed that with large amounts of sequence data, most deep-level relationships within the angiosperms can be resolved and will be of broad utility for many areas of biology, including physiology, ecology, paleobiology, and genomics.
Journal ArticleDOI
Transient Floral Change and Rapid Global Warming at the Paleocene-Eocene Boundary
Scott L. Wing,Guy J. Harrington,F. A. Smith,F. A. Smith,Jonathan I. Bloch,Douglas M. Boyer,Katherine H. Freeman +6 more
TL;DR: Floral response to warming and/or increased atmospheric CO2 during the PETM was comparable in rate and magnitude to that seen in postglacial floras and to the predicted effects of anthropogenic carbon release and climate change on future vegetation.