Trimerophytopsida

At first most of the early land plants other than the bryophytes (i.e. the polysporangiophytes) were placed in a single class Psilophyta, established in 1917 by Kidston and Lang.{{Citation |last1=Crane |first1=P.R. |last2=Herendeen |first2=P. |last3=Friis |first3=E.M. |year=2004 |title=Fossils and plant phylogeny |journal=American Journal of Botany |volume=91 |pages=1683–99 |doi=10.3732/ajb.91.10.1683 |name-list-style=amp |issue=10 |pmid=21652317|doi-access=free }} As additional fossils were discovered and described, it became apparent that the Psilophyta were not a homogeneous group of plants. In 1968 Banks first proposed splitting this taxon into three groups, which he put at the rank of subdivision; he clarified his proposal in 1975. One of the three groups was the Trimerophytina.{{Citation |last=Banks |first=H.P. |year=1968 |editor-last=Drake |editor-first=E.T. |contribution=The early history of land plants |title=Evolution and Environment: A Symposium Presented on the Occasion of the 100th Anniversary of the Foundation of Peabody Museum of Natural History at Yale University |pages=73–107 |location=New Haven, Conn. |publisher=Yale University Press }}, cited in {{Citation |last=Banks |first=H.P. |year=1980 |title=The role of Psilophyton in the evolution of vascular plants |journal=Review of Palaeobotany and Palynology |volume=29 |pages=165–176 |doi=10.1016/0034-6667(80)90056-1 }}{{Citation |last=Banks |first=H.P. |year=1975 |title=Reclassification of Psilophyta |journal=Taxon |volume=24 |issue=4 |pages=401–413 |doi=10.2307/1219491|jstor=1219491 }} The subdivision is based on the type genus Trimerophyton, which might be expected to produce 'Trimerophytophytina' as the name of the subdivision, but the International Code of Nomenclature for algae, fungi, and plants allows the 'phyton' part of a genus name optionally to be omitted before '-ophyta', '-ophytina' and '-opsida'.{{Citation |year=2012 |author1=McNeill, J. |author2=Barrie, F.R. |author3=Buck, W.R. |author4=Demoulin, V. |author5=Greuter, W. |author6=Hawksworth, D.L. |author7=Herendeen, P.S. |author8=Knapp, S. |author9=Marhold, K. |author10=Prado, J. |author11=Prud'homme Van Reine, W.F. |author12=Smith, G.F. |author13=Wiersema, J.H. |author14=Turland, N.J. |volume=Regnum Vegetabile 154 |title=International Code of Nomenclature for algae, fungi, and plants (Melbourne Code) adopted by the Eighteenth International Botanical Congress Melbourne, Australia, July 2011 |edition=electronic |location=Vienna |publisher=A.R.G. Gantner Verlag KG |url=http://www.iapt-taxon.org/nomen/main.php?page=title |access-date=2014-07-02 }}, Article 16.4

The group has also since been treated as a division under the name Trimerophyta{{Citation |last1=Taylor |first1=T.N. |last2=Taylor |first2=E.L. |last3=Krings |first3=M. |year=2009 |title=Paleobotany, The Biology and Evolution of Fossil Plants |edition=2nd |location=Amsterdam; Boston |publisher=Academic Press |isbn=978-0-12-373972-8 |name-list-style=amp }}, p. 227 or Trimerophytophyta, as a class under the name Trimeropsida or Trimerophytopsida (as here),See, e.g., {{harvc |last=Berry |first=C.M. |last2=Fairon-Demaret |first2=M. |contribution=The Middle Devonian Flora Revisited |name-list-style=amp |in=Gensel|in2=Edwards|year=2001|pp=120–139}} and as an order under the name Trimerophytales.{{Citation |last=Banks |first=H.P. |year=1970 |title=Evolution and Plants of the Past |location=London |publisher=Macmillan Press |isbn=978-0-333-14634-7 }}, p. 57

• Subphylum †Trimerophytina Banks 1975{{cite book | author=Novíkov & Barabaš-Krasni | year=2015 | title=Modern plant systematics | pages=685 | publisher=Liga-Pres| isbn=978-966-397-276-3 |doi=10.13140/RG.2.1.4745.6164}}{{cite journal | website=Collection of genus-group names in a systematic arrangement | title=Part 2- Plantae (starting with Chlorophycota) | url=http://mave.tweakdsl.nl/tn/genera2.html | archive-url=https://web.archive.org/web/20180816194336/http://mave.tweakdsl.nl/tn/genera2.html |url-status=dead |archive-date=16 August 2018 |access-date=30 June 2016}}
• Class †Trimerophytopsida Foster & Gifford 1974 [Trimeropsida Banks 1975; Psilophytopsida Kidston & Lang 1917; Psilophytidae Nemejc 1963]
• Order †Trimerophytales Banks ex Kasper et al. 1974 [Psilophytales Pia 1924]
• Family †Trimerophytaceae Banks 1967 [Psilophytaceae Hirmer 1927; Hostinellaceae Pia 1924; Dawsonitaceae Nemejc 1963]
• Genus †Dawsonites Nemejc 1963
• Genus †Hostinella Barrande ex Stur 1882
• Genus †Oocampsa Andrews, Gensel & Kasper 1975
• Genus †Euphyllophyton Hao & Beck
• Genus †Pauthecophyton Xue et al. 2012
• Genus †Psilophyton Dawson 1859 emend. Hueber & Banks 1967
• Genus †Trimerophyton Hopping 1956

• Euphyllophyta, containing seed plants and ferns

{{Reflist}}

• {{Citation |year=2001 |editor-last=Gensel |editor-first=P.G. |editor2-last=Edwards |editor2-first=D. |title=Plants invade the Land : Evolutionary & Environmental Perspectives |location=New York |publisher=Columbia University Press |isbn=978-0-231-11161-4 |name-list-style=amp }}

{{Plant classification}}

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Category:Devonian plants

Category:Devonian first appearances

Category:Devonian extinctions