Actiniscus pentasterias (Ehrenberg) Ehrenberg, 1854

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Actiniscus pentasterias

A&B = Side view (A&C, arrow=extrusomes(docidosomes)), B = One of the pentasters in the cell; C = Apical view middle focus; D = Squashed cell with pentasters and nucleus. A-C = A living cell. (DIC)

Photographer/artist Mats Kuylenstierna

Additional image information

Title
Actiniscus pentasterias
Photographer/artist
Mats Kuylenstierna
Copyright holder
Maria Kuylenstierna
Institute
University of Gothenburg, Marine botany
Contributor
Bengt Karlson
Caption
A&B = Side view (A&C, arrow=extrusomes(docidosomes)), B = One of the pentasters in the cell; C = Apical view middle focus; D = Squashed cell with pentasters and nucleus. A-C = A living cell. (DIC)
Image galleries
Kuylenstierna, Skagerrak-Kattegat

Description

IDs in other systems
Tropic type
H
Morphology
Gymnodinioid cell with two siliceous internal skeletons (=pentasters). Prominent bundle of extrusomes (docidosomes)
Other remarks

Distribution: Subtropical to cold temperate waters. Even in arctic freshwater lakes
Life form
Solitary
Size
Length 30-40 µm, width 35-40 µm
Literature
Hansen, G. 1993b. Light and electron microscopical observations of the dinoflagellate Actiniscus pentasterias (Dinophyceae). J. Phycol. 29: 486-499.
Hansen, G. & Larsen, J. 1992. Dinoflagellater i danske farvande. In: Thomsen, H. A. (ed.) Plankton i de indre danske farvande. Havforskning fra Miljøstyrelsen, Copenhagen, p. 45-155.
Steidinger, K. A. & Tangen, K. 1996. Dinoflagellates. In: Tomas, C. R. (ed.) Identifying marine diatoms and dinoflagellates. Academic Press, Inc., San Diego, p. 387-584.

Biovolumes

Species Actiniscus pentasterias
Author (Ehrenberg) Ehrenberg 1854
Division DINOPHYTA (PYRROPHYTA)
Class Dinophyceae
Order ACTINISCALES
Trophy HT
Geometric shape sphere
Formula p/6*d^3
Size class 1
Unit cell
Size range 35
Diameter(d1), µm 35.0
No. of cells/counting unit 1
Calculated volume, µm3 22 438
Calculated Carbon pg/counting unit 2 630

Source

Olenina, I., Hajdu, S., Edler, L., Andersson, A., Wasmund, N., Busch, S., Göbel, J., Gromisz, S., Huseby, S., Huttunen, M., Jaanus, A., Kokkonen, P., Ledaine, I. and Niemkiewicz, E. 2006 Biovolumes and size-classes of phytoplankton in the Baltic Sea HELCOM Balt.Sea Environ. Proc. No. 106, 144pp. (PDF),
PEG_BVOL.zip

Change History

  • 2017-10-05 13:30:32 Ann-Turi Skjevik - Updated media metadata for Actiniscus pentasterias_7.jpg
  • 2017-10-05 13:30:17 Ann-Turi Skjevik - Added media: Actiniscus pentasterias_7.jpg
  • 2017-10-05 13:29:58 Ann-Turi Skjevik - Updated media metadata for Actiniscus pentasterias_5.jpg
  • 2017-10-05 13:28:30 Ann-Turi Skjevik - Added media: Actiniscus pentasterias_5.jpg
  • 2017-10-05 13:28:18 Ann-Turi Skjevik - Deleted media: Actiniscus pentasterias_5.jpg
  • 2017-10-05 13:28:08 Ann-Turi Skjevik - Updated media metadata for Actiniscus pentasterias_5.jpg
  • 2017-10-05 13:23:30 Ann-Turi Skjevik - Added media: Actiniscus pentasterias_5.jpg
  • 2012-05-14 13:45:46 Malin Mohlin - Updated media metadata for Actiniscus pentasterias_2.jpg
  • 2011-12-21 10:38:02 Ann-Turi Skjevik - Deleted media: Actiniscus pentasterias_5.jpg
  • 2011-12-21 10:37:44 Ann-Turi Skjevik - Updated media metadata for Actiniscus pentasterias_6.jpg
  • 2011-12-21 10:36:40 Ann-Turi Skjevik - Added media: Actiniscus pentasterias_6.jpg
  • 2011-12-21 10:36:13 Ann-Turi Skjevik - Updated media metadata for Actiniscus pentasterias_5.jpg
  • 2011-12-21 10:33:53 Ann-Turi Skjevik - Added media: Actiniscus pentasterias_5.jpg
  • 2011-12-21 10:32:57 Ann-Turi Skjevik - Deleted media: Actiniscus pentasterias_5.JPG
  • 2011-12-21 10:32:39 Ann-Turi Skjevik - Updated media metadata for Actiniscus pentasterias_4.JPG
  • 2011-10-13 11:09:05 Malin Mohlin - Updated media metadata for Actiniscus pentasterias_5.JPG
  • 2011-10-13 11:08:44 Malin Mohlin - Updated media metadata for Actiniscus pentasterias_4.JPG
  • 2011-10-13 11:08:16 Malin Mohlin - Updated media metadata for Actiniscus pentasterias_3.jpg
  • 2011-10-13 11:07:32 Malin Mohlin - Updated media metadata for Actiniscus pentasterias_2.jpg
  • 2011-10-03 08:12:49 Malin Mohlin - Updated media metadata for Actiniscus pentasterias_5.JPG
  • 2011-10-03 08:12:39 Malin Mohlin - Added media: Actiniscus pentasterias_5.JPG
  • 2011-10-03 08:12:21 Malin Mohlin - Updated media metadata for Actiniscus pentasterias_4.JPG
  • 2011-10-03 08:11:55 Malin Mohlin - Added media: Actiniscus pentasterias_4.JPG
  • 2011-10-03 08:11:08 Malin Mohlin - Updated media metadata for Actiniscus pentasterias_3.jpg
  • 2011-10-03 08:09:38 Malin Mohlin - Added media: Actiniscus pentasterias_3.jpg
  • 2011-10-03 08:09:21 Malin Mohlin - Updated media metadata for Actiniscus pentasterias_2.jpg
  • 2011-10-03 08:07:53 Malin Mohlin - Added media: Actiniscus pentasterias_2.jpg