Streptophyta
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| Streptophyta | |
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Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Streptophyta Jeffrey 1967,[1] sensu Leliaert et al. 2012 |
| Subdivisions | |
| Synonyms | |
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Streptophyta (/strɛpˈtɒfɪtə, ˈstrɛptoʊfaɪtə/), informally the streptophytes (/ˈstrɛptəfaɪts/, from the Greek strepto 'twisted', for the morphology of the sperm of some members), is a clade of plants. The composition of the clade varies considerably between authors, but the definition employed here includes land plants and all green algae except the Chlorophyta and the more basal Prasinodermophyta.[4]
Classifications
[edit | edit source]The composition of Streptophyta and similar groups (Streptophytina, Charophyta) varies in each classification.[5][citation needed] Some authors include only the Charales and Embryophyta (e.g., Streptophyta,[1][6] Streptophytina[3]); others include more groups (e.g., Charophyta,[3][6] Streptophyta,[7][8] Streptobionta[9]); some authors use this broader definition, but exclude the Embryophyta (e.g., Charophyta,[10][8] Charophyceae[citation needed], Streptophycophytes[citation needed]).
The clade Streptophyta includes both unicellular and multicellular organisms. Streptophyta contains the freshwater charophyte green algae and all land plants that reproduce sexually by conjugation. Mesostigma viride, a unicellular green flagellate alga may be a basal Streptophyte.[11][12]
These earlier classifications have not taken into account that the Coleochaetophyceae and the Zygnemophyceae appear to have emerged in the Charophyceae + Embryophyta clade, resulting in the synonymy of the Phragmoplastophyta and Streptophytina/Streptophyta sensu stricto (a.k.a. Adl 2012[6]) nomenclature.[13]
Jeffrey, 1967
[edit | edit source]- Streptophyta[1]
Lewis & McCourt 2004
[edit | edit source]- Division Charophyta (charophyte algae and embryophytes)[3]
- Class Mesostigmatophyceae (mesostigmatophytes)
- Class Chlorokybophyceae (chlorokybophytes)
- Class Klebsormidiophyceae (klebsormidiophytes)
- Class Zygnemophyceae (conjugates)
- Order Zygnematales (filamentous conjugates and saccoderm desmids)
- Order Desmidiales (placoderm desmids)
- Class Coleochaetophyceae (coleochaetophytes)
- Order Coleochaetales
- Subdivision Streptophytina
- Class Charophyceae (same as the Smith system, 1938)
- Order Charales (charophytes sensu stricto)
- Class Embryophyceae (embryophytes)
- Class Charophyceae (same as the Smith system, 1938)
Leliaert et al. 2012
[edit | edit source]- Streptophyta[8]
Adl et al. 2012
[edit | edit source]Source:[6]
- Archaeplastida Adl et al. 2005[citation needed]
- Chloroplastida Adl et al. 2005 (Viridiplantae Cavalier-Smith 1981)
- Chlorophyta Pascher 1914, emend. Lewis & McCourt 2004[3]
- Charophyta Migula 1897,[citation needed] emend. Karol et al. 2009 (Charophyceae Smith 1938, Mattox & Stewart 1984)
- Chlorokybus Geitler 1942[citation needed]
- Mesostigma Lauterborn 1894[citation needed]
- Klebsormidiophyceae van den Hoek et al. 1995[citation needed]
- Phragmoplastophyta Lecointre & Guyander 2006[citation needed]
- Zygnematophyceae van den Hoek et al. 1995, emend. Hall et al. 2009[citation needed]
- Coleochaetophyceae Jeffrey 1982[citation needed]
- Streptophyta Jeffrey 1967[1]
- Charophyceae Smith 1938, emend. Karol et al. 2009 (Charales Lindley 1836; Charophytae Engler 1887)[citation needed]
- Embryophyta Engler 1886, emend. Lewis & McCourt 2004[3] (Cormophyta Endlicher 1836; Plantae Haeckel 1866)[citation needed]
- Chloroplastida Adl et al. 2005 (Viridiplantae Cavalier-Smith 1981)
Adl et al. 2019
[edit | edit source]- Archaeplastida Adl et al. 2005[citation needed]
- Chloroplastida Adl et al. 2005[citation needed] (Viridiplantae Cavalier-Smith 1981)[citation needed]
- Phylum Streptophyta [Charophyta]
- Chlorokybus atmophyticus
- Mesostigma viridae
- Family Klebsomidiophyceae
- Class Phragmoplastophyta
- Family Zygnemataceae
- Order Coleochaetophyceae
- Family Characeae
- Kingdom Embryophyta
- Phylum Streptophyta [Charophyta]
- Chloroplastida Adl et al. 2005[citation needed] (Viridiplantae Cavalier-Smith 1981)[citation needed]
Phylogeny
[edit | edit source]Below is a reconstruction of Streptophyta relationships, based on genomic data.[14][15][16]
| Streptophyta/ |
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| charophyta |
Streptofilum, described in 2018,[17] appears to bring in a new branching.[18]
| Streptophyta/ |
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| charophyta |
References
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External links
[edit | edit source]- The plant tree of life: an overview and some points of view Archived 2010-10-09 at the Wayback Machine
- The closest land plants relatives
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