Dictyocha speculum Ehrenberg, 1839

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Dictyocha speculum

A stadium of D.speculum observed during autumn 2014 with many aggregated cells.

Photographer/artist Ann-Turi Skjevik

Additional image information

Title
Dictyocha speculum
Photographer/artist
Ann-Turi Skjevik
Copyright holder
Ann-Turi Skjevik
Institute
SMHI
Contributor
Ann-Turi Skjevik
Caption
A stadium of D.speculum observed during autumn 2014 with many aggregated cells.
Sampling date
2014-11-11
Geographic area
Kattegat - Swedish coast
Location
N7 Nidingen
License
Creative Commons Attribution-NoDerivs 3.0 Unported
Technique
Light microscopy
Preservation
Lugols iodine
Contrast enhancement
DIC/Nomarski
Image galleries
Skagerrak-Kattegat

Description

IDs in other systems
Tropic type
A
Morphology
Skeleton-bearing stage usually with hexagonal skeleton. Naked stage. Both stages with many chloroplasts
Other remarks
Naked stages and life history (see Henriksen et al.1993)
Distribution: Widely in cold and temperate waters
Life form
Solitary flagellate
Size
19-34 µm (including spines)
Culture collections
SCCAP
The Scandinavian Culture Collection of Algae and Protozoa at the University of Copenhagen
More info at http://www.sccap.dk.
Strains: K-0036
Literature
Boney, A. D.1973. Observations on the silicoflagellate Dictyocha speculum Ehrenb. from the Firth of Clyde. J. Mar. Biol. Ass. U.K. 53: 263-268.
Henriksen, P., Knipschildt, F., Moestrup, Ø. & Thomsen, H. A. 1993. Autecology, life history and toxicology of the silicoflagellate Dictyocha speculum (Silicoflagellata, Dictyochophyceae). Phycologia. 32: 29-39.
Throndsen, J. 1993. The planktonic marine flagellates. In: Marine Phytoplankton: a guide to naked flagellates and coccolithophorids/edited by Carmelo R. Tomas: 7-145.
Gemeinhardt, K.1930. Silicoflagellatae. Schiller, J. Coccolithineae. Rabenhorst's Kryptogamen-Flora., 10: 1-85

Biovolumes

Species Dictyocha speculum
Author Ehrenberg 1839
Division CHRYSOPHYTA (HETEROKONTOPHYTA)
Class Dictyochophyceae
Order DICTYOCHALES
Trophy AU
Geometric shape half sphere
Formula p/12*d^3
Size class 1 2 3 4 5 6 7
Unit cell cell cell cell cell cell cell
Size range 20 25 35 20 16 11-15 6-10
Diameter(d1), µm 20.0 25.0 35.0 20.0 16.0 13.0 8.0
No. of cells/counting unit 1 1 1 1 1 1 1
Calculated volume, µm3 2 093 4 089 11 219 4 187 2 144 1 150 268
Calculated Carbon pg/counting unit 284 532 1 372 544 290 162 41

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

  • 2018-03-25 21:42:41 Janina Kownacka - Updated media metadata for Dictyocha speculum_9.jpg
  • 2018-03-25 21:37:54 Janina Kownacka - Added media: Dictyocha speculum_9.jpg
  • 2017-10-12 14:04:52 Ann-Turi Skjevik - Updated media metadata for Dictyocha speculum_7.jpg
  • 2016-11-16 13:06:27 Bengt Karlson - Deleted media: Dictyocha speculum_9.jpg
  • 2016-11-16 13:05:32 Bengt Karlson - Updated media metadata for Dictyocha speculum_9.jpg
  • 2016-11-16 12:58:23 Bengt Karlson - Added media: Dictyocha speculum_9.jpg
  • 2015-04-15 14:30:47 Ann-Turi Skjevik - Updated media metadata for Dictyocha speculum_8.jpg
  • 2015-04-15 14:29:28 Ann-Turi Skjevik - Added media: Dictyocha speculum_8.jpg
  • 2015-04-15 13:19:48 Ann-Turi Skjevik - Updated media metadata for Dictyocha speculum_7.jpg
  • 2015-04-15 13:13:15 Ann-Turi Skjevik - Added media: Dictyocha speculum_7.jpg
  • 2012-09-24 14:41:31 Ann-Turi Skjevik - Updated media metadata for Dictyocha speculum_6.jpg
  • 2012-09-24 14:41:21 Ann-Turi Skjevik - Added media: Dictyocha speculum_6.jpg
  • 2012-09-14 11:27:20 Ann-Turi Skjevik - Updated media metadata for Dictyocha speculum_5.jpg
  • 2012-09-14 11:27:10 Ann-Turi Skjevik - Added media: Dictyocha speculum_5.jpg
  • 2011-12-05 16:25:35 Malin Mohlin - Updated media metadata for Dictyocha speculum_4.JPG
  • 2011-12-05 16:25:08 Malin Mohlin - Added media: Dictyocha speculum_4.JPG
  • 2011-12-05 16:24:54 Malin Mohlin - Deleted media: Dictyocha speculum_4.JPG
  • 2011-12-05 16:24:21 Malin Mohlin - Updated media metadata for Dictyocha speculum_4.JPG
  • 2011-12-05 16:23:46 Malin Mohlin - Added media: Dictyocha speculum_4.JPG
  • 2011-12-05 16:23:37 Malin Mohlin - Deleted media: Dictyocha speculum_4.JPG
  • 2011-12-05 16:21:49 Malin Mohlin - Updated media metadata for Dictyocha speculum_4.JPG
  • 2011-12-05 16:21:14 Malin Mohlin - Added media: Dictyocha speculum_4.JPG
  • 2011-09-26 18:49:17 Bengt Karlson - Updated media metadata for Dictyocha speculum_3.gif
  • 2011-09-26 18:48:22 Bengt Karlson - Added media: Dictyocha speculum_3.gif