| Citation: |
Xin Wang, 2022. On the origin of outer integument, China Geology, 5, 777-778. doi: 10.31035/cg2022020
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On the origin of outer integument
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References
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Figure 1.
Ovule of Cordaianthus duquesnensis, with inner (i) and outer (o) integuments. Specimen 2766, deposited in Field Museum of Nature History. Reproduced from Wang X (2018).