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 52-67 µm. I found two specimens in one sample that measured 56.6 and 67.3 µm respectively.

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, the sandy shore of a deep lake (Spiegelplas) and a mesotrophic pond (Crailoo).

Remarks: This species multiplied well in wet preparations kept in moist chambers .

Hyalosphenia cuneata
Hyalosphenia cuneata
p=pseudostomal edge
n=nucleus
Hyalosphenia cuneata
H. cuneata, Spiegelplas, 2019
Hyalosphenia cuneata
H. cuneata, pseudostomal region – Spiegelplas, 2019
Hyalosphenia cuneata
H. cuneata, optical cross-section – Spiegelplas, 2019
Hyalosphenia cuneata
H. cuneata, 58 µm
Hyalosphenia cuneata
Hyalosphenia cuneata
H. cuneata, 58 µm
Hyalosphenia cuneata
H. cuneata
Hyalosphenia cuneata
From Penard, 1902
Hyalosphenia cuneata
H. cuneata
Hyalosphenia cuneata
Hyalosphenia cuneata
Hyalosphenia cuneata
H. cuneata, Crailoo, 2018
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