Noctilucales

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Noctilucales
Noctiluca scintillans unica.jpg
Scientific classification
Domain: Eukaryota
(unranked): Sar
(unranked): Alveolata
Phylum: Dinoflagellata
Class: Dinophyceae (Noctiluciphyceae or Noctilucea)
Order: Noctilucales
Haeckel, 1894
Families

Kofodiniaceae
Leptodiscaceae
Noctilucaceae
Protodiniferaceae

The Noctilucales are an order of marine dinoflagellates. They differ from most others in that the mature cell is diploid and its nucleus does not show a dinokaryotic organization. They show gametic meiosis.

Characteristics[edit]

These cells are very large, from 0.2 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 flagellum 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.

Taxonomy[edit]

Examples[edit]

The most common species is Noctiluca scintillans, also called N. miliaris. It blooms of this species are red-orange and can be bioluminescent when disturbed,[4] 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.[5]

References[edit]

  1. ^ Gómez F (2012). "A checklist and classification of living dinoflagellates (Dinoflagellata, Alveolata)" (PDF). CICIMAR Océanides. 27 (1): 65–140. 
  2. ^ Ruggiero; et al. (2015), "Higher Level Classification of All Living Organisms", PLoS ONE, 10 (4): e0119248, doi:10.1371/journal.pone.0119248, PMC 4418965Freely accessible, PMID 25923521 
  3. ^ Silar, Philippe (2016), "Protistes Eucaryotes: Origine, Evolution et Biologie des Microbes Eucaryotes", HAL archives-ouvertes: 1–462 
  4. ^ 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 2225713Freely accessible. PMID 5340466. 
  5. ^ 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[edit]

  • 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[edit]