Florideophyceae is a class of red algae. They were once thought to be the only algae to bear pit connections, but these have since been found in the filamentous stage of the Bangiaceae. They were also thought only to exhibit apical growth, but there are genera known to grow by intercalary growth. Most, but not all, genera have three phases to the

life cycle Life cycle, life-cycle, or lifecycle may refer to: Science and academia * Biological life cycle, the sequence of life stages that an organism undergoes from birth to reproduction ending with the production of the offspring * Life-cycle hypothesi ...

Classification

There are various classification schemes; see red algae. One option is to use the following:

Subclass Hildenbrandiophycidae

* Hildenbrandiales

Subclass
Nemaliophycidae Florideophyceae is a class of red algae. They were once thought to be the only algae to bear pit connections, but these have since been found in the filamentous stage of the Bangiaceae. They were also thought only to exhibit apical growth, but ...

* Acrochaetiales *

Balbianiales Balbianiales is an order of red algae belonging to the class Florideophyceae Florideophyceae is a class of red algae. They were once thought to be the only algae to bear pit connections, but these have since been found in the filamentous sta ...

Balliales Balliales is an order of red algae belonging to the class Florideophyceae. The order consists only one family, Balliaceae. with only one genus - Ballia Harvey. The genus of ''Balliales'' was circumscribed by William Henry Harvey in J. Bot. (Hooke ...

* Batrachospermales * Colaconematales *

Nemaliales Nemaliales is an order of red algae. It holds approximately 286 species. Families As accepted by AlgaeBase (with amount of species per genus); * Suborder Galaxaurineae (117) ** Galaxauraceae - 58 spp. **Scinaiaceae - 59 spp. * Suborder Nemali ...

Palmariales Palmariales is an order of marine algae. It includes the edible seaweed dulse (''Palmaria palmata ''Palmaria palmata'', also called dulse, dillisk or dilsk (from Irish/Scottish Gaelic '/'), red dulse, sea lettuce flakes, or creathnach, is a ...

* Entwisleiales *

Thoreales Thoreales is an order of red algae belonging to the class Florideophyceae. The order consists only one family, Thoreaceae .Hassall, A.H. 1845. A history of the British freshwater algae, including descriptions of the Desmideae and Diatomaceae. With ...

Subclass
Corallinophycidae The Corallinophycidae is a grouping of several calcifying red algal lineages recovered by molecular analysis. Orders According to AlgaeBase, it contains; * Order Corallinales Coralline algae are red algae in the order Corallinales. They ar ...

* Corallinales * Corallinapetrales *

Rhodogorgonales The Rhodogorgonales are an order of red algae, a sister group to the corallines. They are always thalloid and calcified; their calcification is very different from the corallines, as individual calcite crystals are deposited in the cell wall of s ...

Sporolithales The Sporolithaceae is the only known family of algae in the Sporolithales order.Kamiya, M., Lindstrom, S.C., Nakayama, T., Yokoyama, A., Lin, S.-M., Guiry, M.D., Gurgel, F.D.G., Huisman, J.M., Kitayama, T., Suzuki, M., Cho, T.O. & Frey, W. (2017). ...

The subclass Corallinophycidae was introduced in 2007.

Subclass Ahnfeltiophycidae

Ahnfeltiales Ahnfeltiales is an order of red algae belonging to the class Florideophyceae Florideophyceae is a class of red algae. They were once thought to be the only algae to bear pit connections, but these have since been found in the filamentous sta ...

* Pihiellales

Subclass
Rhodymeniophycidae Florideophyceae is a class of red algae. They were once thought to be the only algae to bear pit connections, but these have since been found in the filamentous stage of the Bangiaceae. They were also thought only to exhibit apical growth, but ...

Bonnemaisoniales Bonnemaisoniales is an order of red algae in the class Florideophyceae. It includes 2 families; * Bonnemaisoniaceae - 25 spp. * Naccariaceae Naccariaceae is a family of red algae in the order Bonnemaisoniales, with 3 monotypic genera. Which ...

* Ceramiales *

Gelidiales The Gelidiales is a small order of red algae containing ten genera, and approximately 130–160 species, many of which are used to make agar Agar ( or ), or agar-agar, is a jelly-like substance consisting of polysaccharides obtained from t ...

Gigartinales Gigartinales is a red algae order in the class Florideophyceae. Systematics References

Gigartinales, Red algae orders {{red algae-stub ...

* Gracilariales *

Halymeniales Halymeniales is an order of red algae belonging to the class Florideophyceae and the subclass Rhodymeniophycidae. The type species is ''Halymenia'' . The red algae colour comes from photosynthetic pigments (phycoerythrin, phycocyanin, allophycoc ...

Nemastomatales Nemastomatales is an order of red algae. It includes some members of the defunct order Cryptonemiales. References Red algae orders Florideophyceae {{red alga-stub ...

Peyssonneliales Peyssonneliales is a monotypic order of red algae belonging to the class Florideophyceae and the subclass Rhodymeniophycidae. It contains only 1 known family, Peyssonneliaceae . The type species is ''Peyssonnelia'' History Genera ''Peyssonneli ...

* 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.Divergence time estimates and the evolution of major lineages in the florideophyte red algae - Nature
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References

External links

Tree of Life: Florideophyceae
{{Taxonbar, from=Q1002125