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:

 

Placocista spinosa, 105 µm, Tirol
Placocista spinosa, 105 µm, Tirol
Placocista spinosa, 145 µm, Ecuador
Placocista spinosa, 145 µm, Ecuador