The new species Ettingshausenia sarbaensis (Angiospermae) from the Cenomanian-Turonian of Western Kazakhstan in light of the problem of classification of dispersed cretaceous Platanus-like leaves |
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Authors: | N P Maslova P V Shilin |
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Institution: | (1) State Key Laboratory of Crop Genetic Improvement, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, 430070 Wuhan, P. R. China; |
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Abstract: | Based on morphological and epidermal characters of the leaf, a new species, Ettingshausenia sarbaensis sp. nov., from the Cenomanian-Turonian of western Kazakhstan is described. In fossil Platanus-like leaves, the unique epidermal structure, with the combination of encyclocytic, laterocytic, and paracytic stomata and
the presence of trichomes on one or from two to seven epidermal cells, is shown for the first time. Based on variations in
morphological and epidermal characters, two morphotypes corresponding to groups of sun and shade leaves are recognized. The
expediency of consideration of dispersed Cretaceous Platanus-like leaves within the framework of morphological classification of leaves is discussed. |
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Keywords: | |
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