Florideophyceae
| Florideophyceae Temporal range:
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|---|---|
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| "Florideae" from Ernst Haeckel's Kunstformen der Natur, 1904 | |
Scientific classification 
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| Domain: | Eukaryota |
| Clade: | Archaeplastida |
| Division: | Rhodophyta |
| Subdivision: | Eurhodophytina |
| Class: | Florideophyceae Cronquist, 1960[2] |
| Subgroups | |
Florideophyceae is a class of exclusively multicellular red algae.[3][4] They were once thought to be the only algae to bear pit connections,[5] but these have since been found in the filamentous stage of the Bangiaceae.[6] They were also thought only to exhibit apical growth, but there are genera known to grow by intercalary growth.[6] Most, but not all, genera have three phases to the life cycle.[6] In the subclass Nemaliophycidae there are three orders, Balbianiales, Batrachospermales, and Thoreales, which lives exclusively in freshwater.[7]
Classification
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There are various classification schemes; see red algae. One option is to use the following:
Subclass Hildenbrandiophycidae
[edit | edit source]Subclass Nemaliophycidae
[edit | edit source]- Acrochaetiales
- Balbianiales
- Balliales
- Batrachospermales
- Colaconematales
- Nemaliales
- Palmariales
- Entwisleiales
- Thoreales
Subclass Corallinophycidae
[edit | edit source]The subclass Corallinophycidae was introduced in 2007.[8]
Subclass Ahnfeltiophycidae
[edit | edit source]Subclass Rhodymeniophycidae
[edit | edit source]- Bonnemaisoniales
- Ceramiales
- Gelidiales
- Gigartinales
- Gracilariales
- Halymeniales
- Nemastomatales
- Peyssonneliales
- Plocamiales
- Rhodymeniales
- Acrosymphytales
- Atractophorales
- Catenellopsidales
- Sebdeniales
According to molecular clock analysis, Florideophyceae diverged from other red algae about 943 (817–1,049) million years ago. It split into Hildenbrandiophycidae ca. 781 (681–879) mya, Nemaliophycidae ca. 661 (597–736) mya and Corallinophycidae ca. 579 (543–617) mya, and ca. 508 (442–580) mya the split between Ahnfeltiophycidae and Rhodymeniophycidae occurred.[1]
References
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External links
[edit | edit source]Classification of Archaeplastida or Plantae s.l. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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