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2021, 40(1) 1-6 DOI:
ISSN: 1004-5589 CN: 22-1111/P |
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New discovery of Elatocladus submanchurica Yabe et Oishi from Lower Cretaceous Shahezi Formation
of Changtu in Liaoning,China |
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1. College of Paleontology,Shenyang Normal University,Shenyang 110034,China;
2. Key-Lab of Evolution of Past Life in NE Asia,MONR,China,Shenyang 110034,China;
3. Shenyang Center of Geological Survey,China Geological Survey,Shenyang 110034,China;
4. International Center of Geoscience Research and Education in Northeast Asia ( Jilin University) ,Changchun 130026,China |
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Abstract:
The classification and use of coniferous Elatocladus submanchurica and E. manchurica have been controversial for a long time. Some leafy shoot fossils of E. submanchurica from the Lower Cretaceous Shahezi Formation in Shahezi of Changtu,Liaoning,newly found by the authors,reveal the leaves featured by striped and nearly flat shape,with a midvein slightly clear on the leaf surface,and its cuticles amphistomatal in type and haplocheilic and disoriental ( or mostly oblique in orientation) in stomata with strongly cutinized guard cells and subsidiary cells in their inner edges. All the characters are basically consistent to those of the type specimen of E. submanchurica from the Lower Cretaceous of Taojiatun in Jilin,and the present study has enriched the knowledge on this taxon in cuticular features for the first time. The type specimen of E. manchurica from the Middle Jurassic of Nianzigou of Liaoning,is clearly different from E. submanchurica in leaf features. Thus,E. submanchurica should be still regarded as an independent taxon,and remained to use in the Mesozoic plant classifications. |
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Keywords:
Elatocladus submanchurica
Lower Cretaceous
Shahezi Formation
Changtu
Liaoning
new
discovery
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Received Revised Online: |
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