Pteridophyte Phylogeny Group: Perbedaan antara revisi
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'''''Pteridophyte Phylogeny Group'''''
== PPG I ==
Sebagai sistem konsensus pertama, PPG I dibuat pada tahun 2016 dan mencakup hanya tumbuhan paku yang ''extant'' (masih hidup di bumi, belum punah). Sistem klasifikasinya, berbeda dari [[Sistem klasifikasi APG|sistem APG]],
=== Filogeni ===
Klasifikasi dibuat berdasarkan filogeni konsensus, dan berikut penyajjian sampai aras Bangsa (Ordo).<ref name=PPGI/>
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=== Klasifikasi hingga aras anaksuku ===
Sampai dengan aras anaksuku, klasifikasi PPG I adalah sebagai berikut.<ref name=PPGI/>
*Kelas [[Lycopodiopsida]] <small>Bartl.</small> (3 Bangsa, 3 suku, 18 marga)
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:::::*1 marga tidak dimasukkan pada anaksuku apapun.
== Kontroversi tentang banyaknya marga ==▼
PPG I dikritik karena dianggap terlalu banyak menggunakan nama genus (337 genus, dengan 18 genus likofita dan 319 genus paku).<ref name=PPGI/> Dua sistem moderen sebelumnya yang diajukan, dan sistem Christenhusz & Chase (2014) masing-masing memberikan 274 sampai 312 marga paku diusulkan oleh sistem Smith et al. (2006) <ref name=SmitPryeSchuKora06/> dan 5 marga likofita dan sekitar 212 marga paku.<ref name=ChriChas14/> Yang terakhir bahkan mengurangi banyaknya marga paku menjadi 207 pada publikasi lanjutan.<ref name=ChriChas18/>
▲==Kontroversi tentang banyaknya marga==
The number of genera used in each of these two approaches has been defended by their proponents. Defending PPG I, Schuettpelz et al. (2018) argue that the larger number of genera is a result of "the gradual accumulation of new collections and new data" and hence "a greater appreciation of fern diversity and [..] an improved ability to distinguish taxa". They also argue that the number of species per genus in the PPG I system is already higher than in other groups of organisms (about 33 species per genus for ferns as opposed to about 22 species per genus for [[flowering plant|angiosperms]]) and that reducing the number of genera as Christenhusz and Chase propose yields the excessive number of about 50 species per genus for ferns.<ref name=SchuRouhPryeRoth18/> In response, Christenhusz & Chase (2018) argue that the excessive splitting of genera destabilises the usage of names and will lead to greater instability in future, and that the highly split genera have few if any characters that can be used to recognize them, making identification difficult, even to generic level. They further argue that comparing numbers of species per genus in different groups is "fundamentally meaningless".<ref name=ChriChas18/>
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*[[List of fern families]] -->
== Rujukan ==
{{Reflist|refs=
<ref name=ChriChas14>{{Citation |last1=Christenhusz |first1=Maarten J. M. |last2=Chase |first2=Mark W. |date=2014 |title=Trends and concepts in fern classification |journal=Annals of Botany |volume=113 |issue=4 |pages=571–594 |doi=10.1093/aob/mct299 |lastauthoramp=yes |doi-access=free }}</ref>
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<ref name=ChriChas18>{{Citation |last1=Christenhusz |first1=Maarten J. M. |last2=Chase |first2=Mark W. |date=2018 |title=PPG recognises too many fern genera |journal=Taxon |volume=67 |issue=3 |pages=481–487 |doi=10.12705/673.2 |lastauthoramp=yes |doi-access=free }}</ref>
<ref name=PPGI>{{citation |author=PPG I |year=2016 |title=A community-derived classification for extant lycophytes and ferns |journal=Journal of Systematics and Evolution |volume=54 |issue=6 |pages=563–603 |doi=10.1111/jse.12229}}</ref>
<ref name=SchuRouhPryeRoth18>{{Citation |last1=Schuettpelz |first1=Eric |last2=Rouhan |first2=Germinal |last3=Pryer |first3=Kathleen M. |last4=Rothfels |first4=Carl J. |last5=Prado |first5=Jefferson |last6=Sundue |first6=Michael A. |last7=Windham |first7=Michael D. |last8=Moran |first8=Robbin C. |last9=Smith |first9=Alan R. |date=2018 |title=Are there too many fern genera? |journal=Taxon |volume=67 |issue=3 |pages=473–480 |doi=10.12705/673.1 |lastauthoramp=yes |doi-access=free }}</ref>
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▲[[Category:Taksonomi tumbuhan]]
▲[[Category:Tumbuhan paku]]
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