Hyalosphenia cuneata
Hyalosphenia cuneata
Hyalosphenia cuneata, Crailoo 2018

 

 

Hyalosphenia cuneata Stein, 1857

 

Diagnosis: shell exceedingly transparent, without any pores; shell shorter and broader than H. elegans, greatly compressed, with an indication of a broad rounded keel, colorless; without zoochlorellae; nucleus with some spherical nucleolar fragments.

 

Dimensions: Length in literature 60-75 µm; my measurements 52-64 µm.

 

Ecology: Freshwater; clear stagnant water and also among Sphagnum. I found this species in different water types, e.g. peat bogs, an isolated pond in a meadow and the sandy shore of a deep lake (Spiegelplas, Netherlands).

 

Remarks: This species multiplied well in a moist chamber preparations.

 

Hyalosphenia cuneata
Hyalosphenia cuneata
p=pseudostomal edge
n=nucleus
Hyalosphenia cuneata
Hyalosphenia cuneata, 58 µm
Hyalosphenia cuneata

 

Hyalosphenia cuneata
Hyalosphenia cuneata, 58 µm
Hyalosphenia cuneata
Hyalosphenia cuneata
Hyalosphenia cuneata
From Penard, 1902
Hyalosphenia cuneata
Hyalosphenia cuneata
Hyalosphenia cuneata
Hyalosphenia cuneata
Hyalosphenia cuneata
Hyalosphenia cuneata, Crailoo 2018