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Tetrachacysta biconvexa
| biconvexa | |
| Jiabo (1978) | |
| He Chengquan, Song Zhichen and Zhu Youhua (2009) | |
| T_biconvexa, He et al., 2009, Nanjing Institute of Geology and Palaeontology, Nanjing 2100089 - 1.jpg | |
| active | |
| 66 | |
| 34 | |
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No synonyms
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