Dasycladales is an order of large unicellular green algae in the class Ulvophyceae.[4] It contains two families, the Dasycladaceae and the Polyphysaceae.
These single celled algae are from 2 mm to 200 mm long. They live on substrates in shallow warm (>20 °C) euhaline tropical marine waters, usually less than 20 meters deep, and protected from waves.[5] They are very large cells. They are able to attain these sizes without numerous internal cell wells because they build calcium carbonate shells around themselves.
They contain only one nucleus in their vegetative stage, which remains in the bottom of the cell in the holdfast at the substrate. Only when they are ready to produce gametes does the nucleus undergo meiosis and then numerous mitoses into many nuclei which then migrate into the gametangia at the top of the alga.
Because the nucleus is safely hidden in the holdfast, the cells easily regenerate if the top portions are broken off.
These algae are notable for having an intracellular network of 10 nm proteinaceous filaments, possibly for the storage and transport of ribonucleoprotein particles.[6]
Because of all these properties, and the fact that they are easy to manipulate they have been favorite organisms in the study of the role of the nucleus vs the unnucleated cytoplasm in the behavior of cells.
A fossil receptaculitid, considered a member of the Order Dasycladales; Ordovician of Estonia.
^Yang, Jie; Lan, Tian; Zhang, Xi-Guang; Smith, Martin R. (8 March 2023). "Protomelission is an early dasyclad alga and not a Cambrian bryozoan". Nature. 615 (7952): 468–471. doi:10.1038/s41586-023-05775-5. PMID 36890226. S2CID 257425218.
^Womersley HBS (1984). The marine benthic flora of southern Australia. Part I. Adelaide: Government Printer, South Australia.
^Guiry, MD; GM Guiry (2007). "AlgaeBase version 4.2 Taxonomy Browser". AlgaeBase. National University of Ireland, Galway. Retrieved 2007-09-22.
^Cite error: The named reference Berger was invoked but never defined (see the help page).
^Berger, S; Wittke W; Traub P (1998). "Occurrence of proteinaceous 10-nm filaments throughout the cytoplasm of algae of the order Dasycladales". Experimental Cell Research. 240 (2): 176–186. doi:10.1006/excr.1997.3924. PMID 9596990.
Dasycladales is an order of large unicellular green algae in the class Ulvophyceae. It contains two families, the Dasycladaceae and the Polyphysaceae....
"Morpho-molecular assessment of Acetabularia jalakanyakae Sp. Nov. (Dasycladales, Chlorophyta) - a new species from Andaman and Nicobar Islands, India"...
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some arguing that they were calcareous algae, probably of the order Dasycladales. Receptaculitids lived in warm, shallow seas, but consensus disagreeing...
The Ulvophyceae or ulvophytes are a class of green algae, distinguished mainly on the basis of ultrastructural morphology, life cycle and molecular phylogenetic...
(Ulvales-Ulotrichales, Trentepohliales, Cladophorales, Bryopsidales and Dasycladales). Fossils are rare but there are some good candidates in a mid-Ordovician...
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called test in some groups. Many green algae, such as Halimeda and the Dasycladales, and some red algae, the Corallinales, encase their cells in a secreted...
the extant order Dasycladales, Chaetocladus is considered to be an early cousin of this order. Unlike the majority of Dasycladales, Chaetocladus does...
uncertainty of fossils from this age is the group of calcareous green algae, Dasycladales found in the fossil record since the middle Cambrian. These algae do...
cells of Chara). In the siphonous green algae Bryopsidales and some Dasycladales, the entire thallus is a single multinucleate cell, which can be many...
Dasycladaceae is one of the two extant families of green algae of the order Dasycladales. When found in Palaeozoic limestones, they typically indicate depositional...
& Granier B. (1993), "Inventaire des Algues Dasycladales fossiles. I° partie - Les Algues Dasycladales du Tertiaire". Revue de Paléobiologie, 11/2 (1992)...
classification (unranked): Viridiplantae Division: Chlorophyta Class: Ulvophyceae Order: Dasycladales (?) Genus: †Protomelission Brock, G. A. & Cooper, B. J. 1993...
Species Notes Algae Gen. et ap. indet. Filamental algae and other algae Dasycladales Gen. et ap. indet. An unicellular green algae Rhodophyta Gen. et ap....
Ulotrichales Order Ulvales Order Trentepohliales Order Cladophorales Order Dasycladales Order Bryopsidales Order Chaetopeltidales Order Chaetophorales Order...
Vachard & Rodríguez Devonian (Pragian) Spain A probable member of Dasycladales. The type species is B. hispanica. Clypeina? pamelareidae Sp. nov Valid...
(multicellular animals), but tentatively assigned to the green alga order Dasycladales. Beresellids were cosmopolitan and their fossils are found in strata...
and his research team discovered include: Acetabularia jalakanyakae (Dasycladales): A unicellular marine green algae from Andaman & Nicobar Islands, India...
taxonomic family of green algae, one of three families in the order Dasycladales. For single-celled organisms, they are huge, growing to nearly a foot...
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