Microworld

world of amoeboid organisms

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 and among Sphagnum. I found this species in different water types, e.g. peat bogs, an isolated pond in a meadow, an oligotrophic dune lake, the sandy shore of a deep lake (Spiegelplas), a mesotrophic pond (Crailoo) and an eutrophic lake (Gooimeer).

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
H. cuneata, pseudostomal region – Spiegelplas, 2019
H. cuneata, optical cross-section – Spiegelplas, 2019
Hyalosphenia cuneata
H. cuneata, dune lake, Netherlands, 2022
Hyalosphenia cuneata
H. cuneata, 58 µm
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
Ferry Siemensma, created February 24, 2019; last modified February 13, 2023
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