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Spiegelplas
Spiegelplas, arrow indicates the sample location

 

Spiegelplas

The Spiegelplas, which means “Mirror Lake”, is situated in the central part of the Netherlands, c. 20 km south east of Amsterdam. It has been a marsh for thousands of years. The whole area has been flooded several times in the past by the nearby Zuiderzee, until 1932 connected with the North Sea. During  the last centuries the peat was removed and in the 1960s the area was dredged for sand supply. A very large (280 ha) and deep (45 m.) lake remained. At this moment the lake has very clear water and is only fed by rain and seepage. Its salinity level is about 200 mg Cl/l in summer.

Some interesting species:

Artodiscus saltans
Actinocoma ramosa
Psammonobotius linearis
Rhizamoeba timidum

Hyalosphenia cuneata

Spiegelplas
Spiegelplas, arrow indicates the sample location, close to a small beach.
Recent posts

Kibisidytes

K. marinus, after Jepps, 1934 Kibisidytes marinus Jepps, 1934 Diagnosis: Small amoeboid organism occurring in the sea, attached to the surface film or to some

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Phaeobola

P. aeris from Dumack et al., 2000 Phaeobola Dumack et al., 2000 Diagnosis: Cells roundish to oval shaped. Shell colorless to amber-colored, rough surface, few

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Rhizaspis armata

R. armata, 68 µm long, excl. spines – Laegieskamp Rhizaspis armata (Lauterborn, 1901) Dumack et al., 2021 Basionym: Pamphagus armatum Lauterborn, 1890 Diagnosis: Theca membranous,

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Rhizaspis spinosa

The original description with original drawings, Penard, 1890. Rhizaspis spinosa (Penard, 1890) Dumack et al., 2021 Basionym: Trinema spinosum Penard, 1890 Diagnosis: Theca membranous, ovoid

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Difflugia “pseudoclaviformis”

Difflugia “pseudoclaviformis”, front and side view, 424 µm Difflugia “pseudoclaviformis” Diagnosis: Shell pyriform, compressed, with a more or less pronounced aboral protuberance; shell composed of

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Difflugia from Lolo Pass

Shells 461-448 µm, stacked image. I found this large en remarkable shells in sediment of a small mountain lake near Lolo Pass, Montana USA. It differs

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Foraminifer drome

Unknown species, collected from the river Drôme, France, 2021 Unknown species September 2021, I found about ten specimens of an agglutinated foraminifer in a sample

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Cyclopyxis spec

Cyclopyxis spec., 168 µm Cyclopyxis spec. Diagnosis: Shell circular in ventral and dorsal view, more or less hemispherical in lateral view (height/diameter ≈ 0.5); lateral

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Difflugia fallax

Difflugia fallax, from Penard, 1902 Difflugia fallax Penard, 1890 Diagnosis: Shell hyaline or yellowish-greenish, black at low magnification, round in cross section, formed of a

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