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

Authors: Lydon S.J.¹; Watson J.²; Harrison N.A.³

Source: Palaeontology, Volume 46, Number 2, March 2003 , pp. 01-09(9)

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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.

Keywords: Sphenobaiera; Ginkgoales; Lower Cretaceous; Greenland

Language: English

Document Type: Research article

Affiliations: 1: The University of Manchester, UK email: susannah@cs.man.ac.uk 2: The University of Manchester email: jwatson@fs1.ge.man.ac.uk 3: Atos Origin, Middlesborough, UK

Publication date: 2003-03-01