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A toothed Lauraceae leaf from the early Eocene of Tasmania, Australia

Citation

Carpenter, RJ and Jordan, GJ and Hill, RS, A toothed Lauraceae leaf from the early Eocene of Tasmania, Australia, International Journal of Plant Sciences, 168, (8) pp. 1191-1198. ISSN 1058-5893 (2007) [Refereed Article]


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Copyright Statement

Copyright 2007 by The University of Chicago

DOI: doi:10.1086/520721

Abstract

Bandulskaia aestuaria gen. et sp. nov. is described from Early Eocene estuarine sediments in Tasmania. It is represented by an incomplete leaf with a finely toothed margin and well-preserved cuticle. Despite the absence of such teeth in more than 2500 known species of fossil and extant Lauraceae, the fossil cuticle exhibits traits that in combination are found only in the family. These include the derived characters of sunken, paracytic stomata with small, apparently embedded guard cells, stomata confined to small areoles, and stomatal positions that are marked by slitlike abaxial surface apertures, as well as the presence of persistent resin bodies and simple, uniseriate trichomes with thickened, poral bases. Although monimioid teeth occur widely in other lauralean families, the teeth in B. aestuaria are not monimioid, and it is most parsimonious to infer that the teeth were derived independently within Lauraceae, possibly in response to the physiological demands of a warm, waterlogged, high-latitude "greenhouse" environment.

Item Details

Item Type:Refereed Article
Keywords:Early Eocene, Lauraceae, Laurales, leaf cuticle, leaf teeth, stomata
Research Division:Earth Sciences
Research Group:Geology
Research Field:Palaeontology (incl. Palynology)
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Earth Sciences
Author:Carpenter, RJ (Dr Raymond Carpenter)
Author:Jordan, GJ (Associate Professor Greg Jordan)
ID Code:50203
Year Published:2007
Web of Science® Times Cited:20
Deposited By:Plant Science
Deposited On:2007-08-01
Last Modified:2014-11-04
Downloads:224 View Download Statistics

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