New evidence of reproductive organs of <Emphasis Type="Italic">Glossopteris</Emphasis> based on permineralized fossils from Queensland,Australia. I. Ovulate organ <Emphasis Type="Italic">Homevaleia</Emphasis> gen. nov. |
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Authors: | Harufumi Nishida Kathleen B Pigg Kensuke Kudo John F Rigby |
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Institution: | (1) Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo, Tokyo 112-8551, Japan;(2) Arizona State University, Tempe, AZ, USA;(3) Sankyo Labo Service Corporation, Tokyo, Japan;(4) Queensland University of Technology, Brisbane, Australia |
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Abstract: | This study describes Homevaleia gouldii H. Nishida, Pigg, Kudo et Rigby gen. et sp. nov., an ovule-bearing glossopterid organ, based on a combination of recently
collected permineralized specimens from the Late Permian Homevale Station locality in the Bowen Basin of Queensland, Australia,
and on previously studied material from the 1977 Gould and Delevoryas study. Homevaleia, which resembles the compression–impression genus Dictyopteridium, is an inrolled megasporophyll with a distinct keel that bears numerous (over 70) stalked ovules on its adaxial surface.
Ovules are small, oval, with an elaborate mesh-like structure that is developed from the outermost integumentary layers. Specimens
interpreted as representing different developmental stages show there is an apparent interrelationship between megagametophyte
development and the opening of the surrounding fertile structure for pollination. Together, new information provided by this
material enables better understanding of glossopterid reproductive structure and its function in one distinctive form. |
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Keywords: | Australia Bowen Basin Dictyopteridium Glossopteris Gondwana Permian |
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