Oblea rotunda (Lebour) Balech ex Sournia, 1973

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Oblea rotunda CPX (complex)

Cell size 30 µm. Almost spherical cell. Sulcus bordered by a list extending beyond the antapex of the cell. Grouped as Oblea rotunda complex by HELCOM PEG.

Photographer/artist Helena Höglander

Additional image information

Title
Oblea rotunda CPX (complex)
Photographer/artist
Helena Höglander
Copyright holder
Helena Höglander
Institute
Stockholm university, Department of Ecology, Environment and Plant Sciences
Contributing organisation
HELCOM-PEG
Contributor
Helena Höglander
Caption
Cell size 30 µm. Almost spherical cell. Sulcus bordered by a list extending beyond the antapex of the cell. Grouped as Oblea rotunda complex by HELCOM PEG.
Sampling date
2017-05-22
Geographic area
Baltic Sea - Northern Baltic proper
Location
Askö, B1
License
Creative Commons Attribution-NoDerivs 3.0 Unported
Technique
Light microscopy
Preservation
Lugols iodine
Contrast enhancement
Phase contrast
Stain
No stain
Image galleries
HELCOM-PEG

Description

IDs in other systems
Tropic type
H
Morphology
Plate formula: Po, 3', 1a, 6'', 4c, 5''', 2'''', 5s. First apical plate is of meta-type
Other remarks

Distribution: Widely
Life form
Solitary
Size
Diameter = 22-34 µm
Resting spore
+
Literature
Dodge, J. D. 1982. Marine Dinoflagellates of the British Isles. Her Majesty’s Stationery Office, London. 303 pp.
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.
Lebour, M. V. 1922. Plymouth peridinians. I. Diplopsalis lenticula and its relatives. J. mar. biol. Ass. U.K. 12: 795-812.
Lewis, J. 1990. The cyst-theca relationship of Oblea rotunda (Diplopsalidaceae, Dinophyceae). British phycological Journal. 25: 339-351.

Biovolumes

Species Oblea rotunda
Division DINOPHYTA (PYRROPHYTA)
Class Dinophyceae
Order PERIDINIALES
SFLAG CPX
Trophy HT
Geometric shape sphere-10%
Formula p/6*d^3*0.9
Size class 4 1 2 3 5
Unit cell cell cell cell cell
Size range 30 22-28 28-33 34-36 36-42
Diameter(d1), µm 30.0 25.0 30.0 35.0 39.0
No. of cells/counting unit 1 1 1 1 1
Calculated volume, µm3 12 717 7 359 12 717 20 194 27 939
Calculated Carbon pg/counting unit 1 543 923 1 543 2 383 3 232

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

  • 2019-01-03 13:48:52 Helena_Hoglander_PEG - Updated media metadata for Oblea rotunda_2.jpg
  • 2018-12-07 14:07:53 Helena_Hoglander_PEG - Updated media metadata for Oblea rotunda_2.jpg
  • 2018-12-07 14:04:57 Helena_Hoglander_PEG - Added media: Oblea rotunda_2.jpg