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| Parent:
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Tracheophyta/Division [Taxonomy; edit]
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| Rank:
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classis (displays as 公)
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| Link:
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†Progymnosperm|Progymnospermopsida(links to Progymnosperm)
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| Extinct:
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yes
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| Always displayed:
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yes (major rank)
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| Taxonomic references:
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–
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| Parent's taxonomic references:
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Authority: Sinnott (1935) ex Cavalier-Smith (1998)
- Sinnott, E.W. (1935), Botany: Principles and Problems (3rd pán.), New York: McGraw-Hill, OCLC 610937719
- Cavalier-Smith, T. (1998), "A revised six-kingdom system of life", Biol. Rev. Cambridge Philos. Soc., 73: 203–266, doi:10.1111/j.1469-185X.1998.tb00030.x, PMID 9809012
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