Discovery of a petrified noeggerathialean strobilus,Discinites sinensis sp. nov. from the Permian of Shizuishan, Ningxia, China |
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Authors: | Jun Wang |
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Institution: | (1) Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 210008 Nanjing, China |
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Abstract: | A petrified strobilusDiscinites sinensis sp. nov. is discovered from the Lower Permian of Shizuishan in Ningxia, North China. The epidermal cells of sporophyll are
long and narrow, with both ends pointed. Each sporangium is ellipsoid, with the basal part contracted and short, thick sporangiophore-like.
The cells of tapetum and sporangial walls are arranged longitudinally. The annulus is not developed. Mega- and microsporangia
are similar in shape. They can hardly be distinguished unless they are broken, and the spores are exposed.In situ mega- and microspores are also similar in shape and both of theDeltoidospora type. The new species supports the systematic placement ofDiscinites within Noeggerathiales, and the progymnosperm affinity of the Noeggerathiales. |
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Keywords: | Discinites Noeggerathiales din situ spores Permian Ningxia |
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