Noctilucales
| Noctilucales | |
|---|---|
 | |
| Scientific classification | |
| Domain: | Eukaryota |
| (unranked): | Sar |
| Superphylum: | Alveolata |
| Phylum: | Dinoflagellata |
| Class: | Noctiluciphyceae Fensome et al., 1993 |
| Order: | Noctilucales Haeckel, 1894 |
| Families | |
|
Kofodiniaceae | |
The Noctilucales are a peculiar order of marine dinoflagellates.
Characteristics
They differ from most others in that the mature cell is diploid and its nucleus does not show a dinokaryotic organization; also they show gametic meiosis. These cells are very large, from 1 to 2 millimetres in diameter, and are filled with large buoyant vacuoles. Some may contain symbiotic green algae, but there are no chloroplasts. Instead, they feed on other plankton, and there is usually a special tentacle involved in ingestion.
Noctilucales reproduce mainly by fission, but sexual reproduction also occurs. Each cell produces numerous gametes, which resemble more typical athecate dinoflagellates and have the dinokaryotic nuclei. Evidence suggests that they diverged from most other dinoflagellates early on, and they are generally placed in their own class.
Examples
The most common species is Noctiluca scintillans, also called N. miliaris. It can be bioluminescent when disturbed,[1] as are various other dinoflagellates, and large blooms can sometimes be seen as flickering lights on the ocean, known as the milky seas effect.
Another example is Spatulodinium pseudonoctiluca.[2]
References
- ↑ Eckert R, Reynolds GT (May 1967). "The subcellular origin of bioluminescence in Noctiluca miliaris". Journal of General Physiology 50 (5): 1429–58. doi:10.1085/jgp.50.5.1429. PMC 2225713. PMID 5340466.
- ↑ Gómez F, Souissi S (March 2007). "The distribution and life cycle of the dinoflagellate Spatulodinium pseudonoctiluca (Dinophyceae, Noctilucales) in the northeastern English Channel". Comptes Rendus Biologies 330 (3): 231–6. doi:10.1016/j.crvi.2007.02.002. PMID 17434117.
Further reading
- Fernando Gómez, David Moreira, Purificación López-García (2010). "Molecular phylogeny of noctilucoid dinoflagellates (Noctilucales, Dinophyceae)". Protist 161 (3): 466–478. doi:10.1016/j.protis.2009.12.005. PMID 20188628.
External links
- Noctiluca scintillans — Guide to the Marine Zooplankton of south eastern Australia, Tasmanian Aquaculture & Fisheries Institute
- Haddock SH, McDougall CM, Case JF (May 2011). "Red Tides: Noctiluca Red Tide". The Bioluminescence Web Page.
- "Noctilucales". NCBI Taxonomy Browser. 2964.
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