Gumuia
| Gumuia Temporal range:
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|---|---|
Scientific classification
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Lycophytes |
| Plesion: | †Zosterophylls |
| Genus: | †Gumuia S.G.Hao (1989)[1] |
| Species | |
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†G. zyzzataS.G.Hao (1989)[1] | |
Gumuiais agenusof extinctvascular plantsof theEarly Devonian(Pragian or Siegenian, around410million years ago). The genus was first described in 1989 based on fossil specimens from the Posongchong Formation,Wenshan district,Yunnan, China.[1]
Description and phylogeny
[edit]ThesporophyteofG. zyzzataconsisted of leafless stems (axes) with an apparently sympodial organization. Fertile stems had a spike-like organization, with both lateral and terminalsporangia(spore-forming organs); successive sporangia developed on alternate sides of short stems. The genus was tentatively placed in the "zosterophylls".[1]
A cladogram published in 2004 by Crane et al. placesGumiain aparaphyleticstem groupof broadly defined "zosterophylls", basal to thelycopsids(living and extinct clubmosses and relatives).[2]
| lycophytes |
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Hao and Xue in 2013 listed the genus as a zosterophyll.[3]
References
[edit]- ^abcdHao, Shou-Gang (1989),"Gumuia zyzzata—a new plant from the Lower Devonian of Yunnan, China",Acta Botanica Sinica(in Chinese and English),31(12): 954–961,retrieved2011-02-08(the English title in the online version has the misspelling "Gumoia" )
- ^Crane, P.R.; Herendeen, P.; Friis, E.M. (2004), "Fossils and plant phylogeny",American Journal of Botany,91(10): 1683–99,doi:10.3732/ajb.91.10.1683,PMID21652317
- ^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, p. 329,ISBN978-7-03-036616-0,retrieved2019-10-25
