Fragilidium subglobosum (von Stosch) Loeblich III

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Fragilidium subglobosum

A = Vegative cells with loose theca and with food vacuoles; B = Division cyst; C = APC; D = 1''-plate with pore. All (DIC)

Photographer/artist Mats Kuylenstierna

Additional image information

Title
Fragilidium subglobosum
Photographer/artist
Mats Kuylenstierna
Copyright holder
Maria Kuylenstierna
Institute
University of Gothenburg, Marine botany
Contributor
Bengt Karlson
Caption
A = Vegative cells with loose theca and with food vacuoles; B = Division cyst; C = APC; D = 1''-plate with pore. All (DIC)
Image galleries
Kuylenstierna, Skagerrak-Kattegat

Description

IDs in other systems
Tropic type
A
Morphology
1''-plate
Other remarks
It has been shown to be a facultative mixotroph and able to engulf Ceratium spp (Skovgaard 1996a,b). F. subglobosum was common in Gullmarsfjorden during summer.
Life form
Solitary
Size
Diameter=35-45 µm, division cyst =22-56(70?) µm
Resting spore
+
Literature
Skovgaard, A. 1996a. Engulfment ofCeratium spp. (Dinophyceae) by the thecate photosynthetic dinoflagellate Fragilidium subglobosum. Phycologia. 35: 490-499.
Skovgaard, A. 1996b. Mixotrophy in Fragilidium subglobosum (Dinophyceae): growth and grazing responses as functions of light intensity. Mar Ecol Prog Ser. 143: 247-253.
von Stosch, H. 1969. Dinoflagellaten aus der Nordsee II. Helgolandinium subglobosum gen. et spec. nov. Helgoländer Wiss. Meeresunters. 19: 569-577.

Biovolumes

Species Fragilidium subglobosum
Author (von Stosch) Loeblich III
Division DINOPHYTA (PYRROPHYTA)
Class Dinophyceae
Order GONYAULACALES
Trophy AU
Geometric shape rotational ellipsoid
Formula p/6*d^2*l
Size class 1 2
Unit cell cell
Size range 35-45 25-35
Length(l1), µm 40.0 30.0
Diameter(d1), µm 35.0 25.0
No. of cells/counting unit 1 1
Calculated volume, µm3 25643 9 813
Calculated Carbon pg/counting unit 2981.8 1 210

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