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Leptophrys elegans
ca. 300 µm, characteristic shape

Darbyshirella spec.

Diagnosis: Trophozoites ribbon-shaped, with continuously moving granular colorless cytoplasm, bidirectional; usually flattened and spreading on surfaces. Filopodia usually produced at the edges of the cell, often originating from a hyaline and very delicate fringe of cytoplasm. Filopodia long and thin, tapering, mostly unbranched, sometimes anastomosing. No membranosomes present on the pseudopodia. Cytoplasm with several contractile vacuoles; colorless granules, possibly corresponding to the membranosomes of Vampyrella. Several nuclei, about 10 pro specimen, hardly visible, vesicular, elongated elliptical or nearly spherical, with a central nucleolus, all shapes observed within one specimen. Cells usually stationary, moving very slowly over surfaces. No cysts observed.

Dimensions: my measurements: stretched body 300-350 µm; nuclei 4.1-6.8 µm.

Ecology: Fresh water, Sphagnum.

Remarks: The photomicrographs on this page are from two specimens which I found in a moist chamber preparation. They hardly didn’t move, only changed their filopodia. There was a continuing bidirectional streaming of granules. Each specimen had about ten nuclei, in shape varying from elliptical to elongated elliptical. The next day both specimens were gone, I couldn’t find any trace of them. The sample came from the Diepveen, a fen near Dwingeloo, The Netherlands.

 

Leptophrys elegans
Arrows indicate nuclei (n) and anastomosing filopodia (A).
Leptophrys elegans
Leptophrys elegans
Leptophrys elegans
Elongated elliptical nucleus and elliptical nucleus
Leptophrys elegans
Arrows indicate nuclei.
Leptophrys elegans
Second specimen from Diepveen, in same preparation, ca. 350 um.
Leptophrys elegans
The same specimen as before, detail
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