Barinophyte
Barinophyte | |
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | †Barinophytes |
Genera | |
The barinophytes are a group of extinct vascular plants (tracheophytes). Their relationship with other vascular plants is unclear. They have been treated as the separate class Barinophytopsida, the order Barinophytales of uncertain class and as a family or clade Barinophytaceae within the zosterophylls. They have also been considered to be possible lycopodiopsids.[1]
Description
Dibracophyton has been tentatively assigned to this group. It does have some outgrowths on the lower parts of the stems (axes), which raises the possibility that more fossil material might show that other barinophytes did not have naked stems.[1]
Taxonomy
Phylogeny
Two very different cladograms have been produced showing the evolutionary relationships of taxa assigned to the barinophytes. Kenrick and Crane in 1997 placed two species of Barinophyton and the genus Protobarinophyton in the Barinophytaceae in their Sawdoniales, well nested within the zosterophylls.[3] A summary cladogram produced by Crane et al. in 2004, shows Barinophyton and Protobarinophyton as 'core' zosterophylls.[4]
lycophytes |
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Taylor et al. in 2009 did not present a cladogram, but considered the barinophytes to be possible lycopsids rather than zosterophylls.[2] By contrast, Hao and Xue in 2013 do not even place Dibracophyton, which they consider to be a possible barinophyte, within the lycopodiopsids, instead putting it between this group and the euphyllophytes.[5]
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Genera
Genera that are placed, or tentatively placed, in the barinophytes (with the group treated at different ranks) include:[1][6][3][7][8]
References
- ^ a b c Hao & Xue (2013), p. 55.
- ^ ISBN 978-0-12-373972-8
- ^ ISBN 978-1-56098-730-7
- PMID 21652317
- ^ Hao & Xue (2013), p. 246.
- ^ Hao & Xue (2013), p. 329.
Bibliography
- Hao, Shougang & Xue, Jinzhuang (2013), The early Devonian Posongchong flora of Yunnan: a contribution to an understanding of the evolution and early diversification of vascular plants, Beijing: Science Press, ISBN 978-7-03-036616-0