Form taxon (plural form taxa) is a biological term with two uses: In general taxonomy, it is a kind of wastebasket taxon, either a taxon that is not a natural group but united by shared plesiomorphies, or a presumably artificial group of organisms whose true relationships are not known, being obscured by ecomorphological similarity. Well-known form taxa of this kind include "ducks", "fish", "reptiles" and "worms".

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  • Form taxon (plural form taxa) is a biological term with two uses: In general taxonomy, it is a kind of wastebasket taxon, either a taxon that is not a natural group but united by shared plesiomorphies, or a presumably artificial group of organisms whose true relationships are not known, being obscured by ecomorphological similarity. Well-known form taxa of this kind include "ducks", "fish", "reptiles" and "worms". In paleobotany, the term is occasionally substituted for the more correct term "organ taxon", meaning a group of fossils of a particular part of a plant, such as a leaf or seed, whose parent plant is not known because the fossils were preserved unattached to the parent plant.
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  • Form taxon (plural form taxa) is a biological term with two uses: In general taxonomy, it is a kind of wastebasket taxon, either a taxon that is not a natural group but united by shared plesiomorphies, or a presumably artificial group of organisms whose true relationships are not known, being obscured by ecomorphological similarity. Well-known form taxa of this kind include "ducks", "fish", "reptiles" and "worms".
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  • Form taxon
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