Peyssonneliales | |
---|---|
Peyssonnelia squamaria | |
Scientific classification | |
(unranked): | Archaeplastida |
Division: | Rhodophyta |
Class: | Florideophyceae |
Subclass: | Rhodymeniophycidae |
Order: | Peyssonneliales D.M. Krayesky, J.N. Norris & S. Fredericq, 2009 [1] |
Family: | Peyssonneliaceae Denizot, 1968 |
Peyssonneliales is a monotypic order of red algae belonging to the class Florideophyceae and the subclass Rhodymeniophycidae. [2] It contains only 1 known family, PeyssonneliaceaeDenizot, M., 1968. [1] [3]
The type species is Peyssonnelia Decaisne
Genera Peyssonnelia and Sonderopelta were originally in order Gigartinales Schmitz. [4] but comparative morphology and rbcL and nuclear LSU rRNA sequence data showed that they were separate and therefore order Peyssonneliales was established in 2009 to hold them both. [5] [1]
Incendia was initially resolved as a monophyletic clade with full support for rbcL. [6] Then using robust rbcL phylogeny, order Peyssonneliales was lso resolved as monophyletic with well-supported main lineages. [7]
Delineation of the various genera in the Peyssonneliaceae had mostly been based on vegetative characteristics. [7]
Peyssonneliales order algae are red, crustose, [8] prostrate, and usually epilithic (growing on the surfaces of rocks). The crusts may be non-calcified throughout, calcified throughout, or partially calcified (with hypobasal calcification (situated posterior to the basal wall) between the attachment rhizoids). Calcium carbonate, if present, is in the mineral form aragonite (James et al., 1988). The lower surfaces of the crusts are partially to completely attached to the sub-stratum, either directly (i.e., without rhizoids) or by unicellular or multi cellular rhizoids. Prostrate growth is by radiating marginal rows of transversely dividing apical initials in the basal layer (multi axial). These growths then later divide vertically to form a single upper or lower perithallial cell (surrounding the thallus). The first section of the perithallial cells gives rise to simple or branched filaments that together form a loose to compact upper- only cortex or upper and lower cortices. Cortical cells have numerous discoid or ribbon- like chloroplasts. [5]
The red algae colour comes from photosynthetic pigments (phycoerythrin, phycocyanin, allophycocyanin). Then the various blends of relative amounts of these 3 and chlorophyll, influences the plant colour, which can vary from dark red to blue, brown, or greenish. [9]
As accepted by AlgaeBase (with number of species per genera); [10]
Former genera; GymnosorusTrevisan, HaematostagonStrömfelt, LithymeniaZanardini, NardoaZanardini and SonderopeltaWomersley & Sinkora [10]
WoRMS doesn't accept the genera; Agissea, Brasilophycus, Olokunia, Piriora, Rhodowynnea and Squamaria.
It also notes; Cruoriopsis is accepted as synonym of Peyssonnelia, HaematostagonStrömfelt, 1886 is accepted as synonym of Peyssonnelia, LithymeniaZanardini, 1863 is accepted as synonym of PeyssonneliaSonderopeltaWomersley & Sinkora, 1981 is accepted as synonym of Sonderophycus. [11]
The order has cosmopolitan distribution, [12] worldwide. [5] They are found in places such as Brazil, [6] [7] western Atlantic Ocean, [13] San Andres Island, (in the Caribbean Sea), [14] Jamaica (also in the Caribbean Sea), [15] Puerto Rico, [13] [16] Gulf of California (Pacific Ocean), [5] Hawaii, [17] [18] Azores (Atlantic Ocean), [8] Brittany in France, [19] southern Australia, [4] New Zealand, [20] also parts of Asia (near Indonesia, Thailand, South Korea and China). [21]
They can grow at low depths, from the Intertidal zone, [5] (between 90–120 m (295–394 ft) in western Atlantic Ocean), [13] or down to depths as low as 288 m (945 ft) below sea level in the Pacific Ocean (near California). [5]
Members of Peyssonneliales can be found growing on hard substratum (bedrock), [5] or found growing on corals. [15]
Peyssonnelia has anti-viral abilities. [22]
Peyssonneliaceae make thick, brown/dark red growths that may have a soft top above a hard base. Fish do not eat it, allowing it to grow and smother corals. Peyssonneliaceae also keep coral from successfully reproducing sexually by preventing coral larvae from settling. [23]
The silicoflagellates are a small group of unicellular photosynthetic protists, or algae, belonging to the supergroup of eukaryotes known as Stramenopiles. They behave as plankton and are present in oceanic waters. They are well-known from harmful algal blooms that cause high mortality of fish. Additionally, they compose a rich fossil record represented by their silica skeletons.
Gracilaria is a genus of red algae (Rhodophyta) notable for its economic importance as an agarophyte, as well as its use as a food for humans and various species of shellfish. Various species in the genus are cultivated among Asia, South America, Africa and Oceania.
Udotea is a genus of green algae in the family Udoteaceae.
Conceptacles are specialized cavities of marine and freshwater algae that contain the reproductive organs. They are situated in the receptacle and open by a small ostiole. Conceptacles are present in Corallinaceae, and Hildenbrandiales, as well as the brown Fucales. In the Fucales there is no haploid phase in the reproductive cycle and therefore no alternation of generations. The thallus is a sporophyte. The diploid plants produce male (antheridia) and female (oogonia) gametangia by meiosis. The gametes are released into the surrounding water; after fusion, the zygote settles and begins growth.
Peyssonnelia is a genus of thalloid red alga, named after naturalist Jean-André Peyssonnel (1694–1759) It includes the algae commonly known as rumoi-iwanokawa, mayoi-iwanokawa and akase-iwanokawa. Specimens can reach around 20 cm in size. Peyssonnelia produces tetraspores.
The Delesseriaceae is a family of about 100 genera of marine red alga.
Isabella Aiona Abbott was an educator, phycologist, and ethnobotanist from Hawaii. The first native Hawaiian woman to receive a PhD in science, she became a leading expert on Pacific marine algae.
The Sporolithaceae is the only known family of algae in the Sporolithales order.
Amphiroa is a genus of thalloid red algae under the family Corallinaceae.
Jania is a genus of red macroalgae with hard, calcareous, branching skeletons in the family Corallinaceae.
Hypnea is a genus of red algae, and a well known carrageenophyte.
Karenia bicuneiformis, also known as Karenia bidigitata is a microbial species from the genus Karenia, which are dinoflagellates. It was first discovered in New Zealand.
Timothy (Tim) John Entwisle, is an Australian botanist, much of whose research work is in phycology (algae). See for example the articles. He was awarded a Ph.D. from La Trobe University in 1986 for work on the taxonomy of Vaucheria.
Chondria tumulosa is a species of red algae in the family Rhodomelacae. It was first discovered in 2016, growing in small patches in the Pearl and Hermes Atoll in the Northwestern Hawaiian Islands. By 2019, the species had spread to cover several thousand square meters, smothering and killing vast swathes of the atoll's coral reefs. C. tumulosa is unlike any other species in its genus, having a tumbleweed-like growth form that allows fragments to break off and spread, allowing it to colonize new areas. The true origin of C. tumulosa in the region remains unknown; it displays many characteristics of an invasive species and is not closely related to any other Hawaiian Chondria, but it would have been relatively difficult to colonize such a remote area. It has also been suggested that it is a native species that suddenly spread due to changes in the ecosystem. Control and mitigation strategies will have to be made to prevent the species' spread.
Callithamniaceae is a family of red algae (Rhodophyta) in the order Ceramiales. The family was first described by Friedrich Traugott Kützing in 1843.
Naccariaceae is a family of red algae in the order Bonnemaisoniales, with 3 monotypic genera that are found in both the Pacific and Atlantic Oceans.
Scinaiaceae is a family of red algae (Rhodophyta) in the order Nemaliales.
Liagoraceae is a family of red algae (Rhodophyta) in the order Nemaliales. The type genus is LiagoraJ.V.Lamouroux.
Halymeniales is an order of red algae belonging to the class Florideophyceae and the subclass Rhodymeniophycidae.
Randall Kosaki is a research ecologist at the NOAA Papahānaumokuākea Marine National Monument. His expertise is in the behavioral ecology, taxonomy, and biogeography of Pacific coral reef fishes.