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Tetrachacysta
General
Description
Stratigraphy
Literature
Notes
Species
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Age range (in million years)
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Image
Name
Publication
allenii
Backhouse, J. (1988)
amphidoxosum
He Chengquan, Song Zhichen and Zhu Youhua (2009)
baculata
Backhouse, J. (1988)
biconvexa
He Chengquan, Song Zhichen and Zhu Youhua (2009)
biconvexa ssp. biconvexa
()
biconvexa ssp. granulata
He Chengquan, Song Zhichen and Zhu Youhua (2009)
biconvexa ssp. laevigata
He Chengquan, Song Zhichen and Zhu Youhua, (2009)
dawanensis
He Chengquan, Song Zhichen and Zhu Youhua (2009)
granulata
Mao Shaozhi, Wan Chunbiao and Qiao Xiayun (1999)
keenei
Marshall, N.G. (1989)
magnusa
He Chengquan, Song Zhichen and Zhu Youhua (2009)
minuta
He Chengquan, Song Zhichen and Zhu Youhua (2009)
multispinosa
He Chengquan, Song Zhichen and Zhu Youhua (2009)
parvita
He Chengquan, Song Zhichen and Zhu Youhua (2009)
spinosigibberosa
Backhouse, J. (1988)
spinulosa
Mao Shaozhi, Wan Chunbiao and Qiao Xiayun (1999)
tuberculata
Mao Shaozhi, Wan Chunbiao and Qiao Xiayun (1999)
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