Placocista spinosa
Placocista spinosa
Placocista spinosa, 136 µm – British Columbia, sample: Thierry Heger

 

Placocista spinosa (Penard, 1899)

Diagnosis: shell broad, ovoid, strongly compressed, with acute lateral border; shell edge with spines; shell composed of many small scales; along the aperture is an area covered with very minute scales; aperture a broad but very flattened slit, biconvex; nucleus spherical, with fragmented nucleolar material; filopodia.

Dimensions: 105-145 µm

Ecology: Sphagnum, peat bogs

Remarks:

lacocista spinosa
Placocista spinosa, 105 µm, Tirol
lacocista spinosa
Placocista spinosa, 105 µm, Tirol
lacocista spinosa
Placocista spinosa, 145 µm, Ecuador
lacocista spinosa
Placocista spinosa, 145 µm, Ecuador
lacocista spinosa
P. spinosa, Germany (sampled by Hans Rothauscher, 2019)
lacocista spinosa
P. spinosa, Germany (sampled by Hans Rothauscher, 2019)
lacocista spinosa
P. spinosa, Germany (sampled by Hans Rothauscher, 2019)
Recent posts

Difflugia bicruris

Difflugia bicruris, after Gauthier-Lièvre et Thomas, 1958 Difflugia bicruris  Gauthier-Lièvre et Thomas, 1958 Diagnosis: Test elongate ovoid, in cross section circular, with almost parallel sides;

Read More »

Difflugia congolensis

Difflugia congolensis, after Gauthier-Lièvre et Thomas, 1958 Difflugia congolensis  Gauthier-Lièvre et Thomas, 1958 Diagnosis: Test elongate pyriform, acuminate, with a spine of variable size and

Read More »

Difflugia key ovoid

Difflugia Ovoid Group Key characters: Test ovoid, in cross section rounded. Pseudostome circular. 1 Test with collar or short neck 2 1′ Test without collar

Read More »