| 21. | It is thought that this population may constitute a separate taxon.
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| 22. | "Penstemon alluvoirum " is a poorly understood taxon.
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| 23. | Specimens of this taxon were sent to Trattinick by Count Berchtold.
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| 24. | The taxon has not been assessed in the IUCN Red List.
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| 25. | If so, baphetids may be a rather important taxon.
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| 26. | In this case of one taxon, remains are reasonably well known.
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| 27. | Pelycosauria is a paraphyletic taxon because it excludes the therapsids.
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| 28. | Note that a type does not determine the circumscription of the taxon.
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| 29. | Monterosato, 1914, although this taxon is now regarded as invalid.
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| 30. | Another order that appears to belong to this taxon is the Mikrocytida.
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