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SOME SPECIES OF TETRAGRAPTUS FROM THE NINGKUO SHALE(LOWER ORDOVICIAN)OF ZHEJIANG(CHEKIANG) |
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| Authors: | MYGEH |
| Institution: | Institute of Geology and Palaeontology,Academia Sinica |
| Abstract: | The present paper describes the following 19 species and varieties of Tetragraptusfrom the Ningkuo Shale of Zhejiang,among them 8 are new to science.1.Tetragraptus quadribrachiatus(Hall) |
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