A Zygnema species in Wicomico Co., Maryland (10/7/2010). Photographed at 100x magnification.
A Zygnema species collected in Somerset Co., Maryland (4/19/2015). Photographed at 400x magnification.
Zygnema species in Calvert Co., Maryland (Date obscured). (c) johnbotany, some rights reserved (CC BY-NC).
Zygnema species in Howard Co., Maryland (Date obscured). (c) johnbotany, some rights reserved (CC BY-NC).
Immature zygospores of Zygnema species in Howard Co., Maryland (Date obscured). (c) johnbotany, some rights reserved (CC BY-NC).
Zygnema species in St. Mary's Co., Maryland (2/24/2021). (c) johnbotany, some rights reserved (CC BY-NC).
Zygnema species in St. Mary's Co., Maryland (Date obscured). (c) johnbotany, some rights reserved (CC BY-NC).
Map Snapshot
8 Records
Description
"This genus is easy to identify with its two stellate chloroplasts in each vegetative cell. It is much more difficult to determine the species without conjugating (sexual) material." (L. Biechele, pers. comm.)
Citations
No citations linked for this taxon yet.
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A Zygnema species in Wicomico Co., Maryland (10/7/2010). Photographed at 100x magnification.
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Media by
Lance Biechele.
A Zygnema species collected in Somerset Co., Maryland (4/19/2015). Photographed at 400x magnification.
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Media by
Lance Biechele.
Zygnema species in Calvert Co., Maryland (Date obscured). (c) johnbotany, some rights reserved (CC BY-NC).
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Media by
John Hall.
Zygnema species in Howard Co., Maryland (Date obscured). (c) johnbotany, some rights reserved (CC BY-NC).
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Media by
John Hall.
Immature zygospores of Zygnema species in Howard Co., Maryland (Date obscured). (c) johnbotany, some rights reserved (CC BY-NC).
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Media by
John Hall.
Zygnema species in St. Mary's Co., Maryland (2/24/2021). (c) johnbotany, some rights reserved (CC BY-NC).
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Media by
John Hall.
Zygnema species in St. Mary's Co., Maryland (Date obscured). (c) johnbotany, some rights reserved (CC BY-NC).
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Media by
John Hall.
Source: Wikipedia
| Zygnema | |
|---|---|
| |
| Zygnema, showing characteristic dual star-shaped chloroplasts. Numbered ticks are 20 μm apart. | |
| |
| Numbered ticks are 122 μm apart. | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Class: | Zygnematophyceae |
| Order: | Zygnematales |
| Family: | Zygnemataceae |
| Genus: | Zygnema C. Agardh, 1817 |
| Synonyms | |
Zygnema is a genus of freshwater filamentous thalloid alga comprising about 100 species.[4] A terrestrial species, Z. terrestre, is known from India. Zygnema grows as a free-floating mass of filaments, although young plants may be found anchored to streambeds with a holdfast. The filaments form a yellow-green to bright green colored tangled mat, and are composed of elongate barrel-shaped cells, each with two star-shaped (stellate) chloroplasts arrayed along the axis of the cell.
Species
[edit]Some species include:
- Z. atrocoeruleum
- Z. binuclearioides
- Z. carinthiacum
- Z. carteri
- Z. circumcarinatum
- Z. coeruleum
- Z. conspicuum
- Z. cruciatum
- Z. cyanosphaeroidicum
- Z. cylindricum
- Z. cylindrospermum
- Z. fanicum
- Z. gorakhporense
- Z. insigne
- Z. kashmirense
- Z. kiangsiense
- Z. leiospermum
- Z. melanosporum
- Z. momoniense
- Z. normanii
- Z. oveidanum
- Z. pectinatum
- Z. peliosporum
- Z. quadrispirale
- Z. ralfsii
- Z. rivulare
- Z. ruviatum
- Z. schwabei
- Z. spontaneum
- Z. stagnale
- Z. stellinum
- Z. subtile
- Z. tenue
- Z. tenuissimum
- Z. terrestre
- Z. vaginatum
- Z. vaucherii
- Z. verrucosum
References
[edit]- ^ a b c d e f g h i Guiry, M.D. (2013). Taxonomy and nomenclature of the Conjugatophyceae (=Zygnematophyceae). Archived March 5, 2016, at the Wayback Machine Algae. An International Journal of Algal Research 28: 1-29.
- ^ "Algaebase, entry for Lucernaria". Retrieved 20 February 2016.
- ^ "Algaebase, entry for Pleurodiscus". Retrieved 9 September 2014.
- ^ Guiry, M.D.; Guiry, G.M. (2008). "Zygnema". AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. Retrieved 2009-02-21.
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