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Charophyta (UK: / k ə ˈ r ɒ f ɪ t ə, ˌ k ær ə ˈ f aɪ t ə /) is a group of freshwater green algae, called charophytes (/ ˈ k ær ə ˌ f aɪ t s /), sometimes treated as a division, [2] yet also as a superdivision [3] or an unranked clade.
Zygnematophyceae (or Conjugatophyceae) is a class of green algae in the paraphylum streptophyte algae, also referred to as Charophyta, [2] consisting of more than 4000 described species. [3] The Zygnematophyceae are the sister clade of the Embryophyta (land plants).
Charophyceae is a class of charophyte green algae. AlgaeBase places it in division Charophyta. [1] Extant (living) species are placed in a single order Charales, [2] commonly known as "stoneworts" and "brittleworts".
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The fossils of Parka decipiens seem small circular, elliptic or irregular patches reaching a diameter of 0.5–7.5 centimetres (0.20–2.95 in), with a reticulate structure showing small coaly discs.
Systematically they fall within the division Charophyta/Streptophyta, in which the land plants (Embryophyta) emerged. [3] Sexual reproduction in Zygnematales takes place through a process called conjugation. [4] Here filaments of opposite gender line up, and tubes form between corresponding cells.
Charales is an order of freshwater green algae in the division Charophyta, class Charophyceae, commonly known as stoneworts. Depending on the treatment of the genus Nitellopsis, living (extant) species are placed into either one family or two (Characeae and Feistiellaceae). Further families are used for fossil members of the order.
The Zygnemataceae are a family [2] of filamentous or unicellular, uniseriate (unbranched) green algae.The filaments are septated and reproduction is by conjugation; Spirogyra is commonly used in schools to demonstrate this kind of reproduction.