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Article: The lectotype of Sphenobaiera ikorfatensis (Seward) Florin, a ginkgophyte from the Lower Cretaceous of western Greenland

Publication: Palaeontology
Volume: 46
Part: 2
Publication Date: March 2003
Page(s): 413 421
Author(s): Susannah J. Lydon, Joan Watson and Nicola A. Harrison
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How to Cite

LYDON, S. J., WATSON, J., HARRISON, N. A. 2003. The lectotype of Sphenobaiera ikorfatensis (Seward) Florin, a ginkgophyte from the Lower Cretaceous of western Greenland. Palaeontology46, 2, 413–421.

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Abstract

Use of the genus Sphenobaiera Florin for deeply divided ginkgoalean leaves lacking a petiole is discussed. The type material of the species Sphenobaiera ikorfatensis (Seward) Florin from the Lower Cretaceous at Ikorfat in West Greenland is diagnosed, redescribed and the lectotype designated. The cuticle, which is described and figured in detail for the first time, shows the leaf to be amphistomatic and allows previous identifications of Sphenobaiera ikorfatensis in Lower Cretaceous floras from Siberia and China to be confirmed.
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