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Difflugia rubescens, feeding on an algae

Difflugia rubescens Penard, 1891
= Pseudonebela rubescens new comb.?

Diagnosis: test pyriform, yellow or light brown in color; membrane chitinous, encrusted with foreign particles and diatoms. Aperture circular, bordered by a incurved crenulate margin; protoplasm usually containing numerous granules of brick-red color; cyst equally red or brownish-red in color.

Dimensions; in literature: length 65-105 µm; breadth of shell 38-54; diameter of aperture 14-20 µm.

Ecology: aquatic vegetation and among Sphagnum or moss.

Remarks: Difflugia rubescens makes holes in filamentous algae and eats their content.
This is probably a Pseudonebela species. See Siemensma and Opitz, 2014.

Difflugia rubescens pseudostome
Difflugia rubescens pseudostome
Difflugia rubescens, pseudostome, Austria (l) and Netherlands (r)
Difflugia rubescens pseudostome
Difflugia rubescens pseudostome
Difflugia rubescens, pseudostome, Cardet, France, 2019
Pseudostome, Dutch specimen (l), other test from Cardet, France 2019 (r)
Difflugia rubescens, 83 µm, the Netherlands
Difflugia rubescens
Difflugia rubescens, stacked image – Tirol, Austria
Difflugia rubescens
Difflugia rubescens, feeding on a Closterium – The Netherlands
Difflugia rubescens
Difflugia rubescens – The Netherlands
Difflugia rubescens
Difflugia rubescens, but probably Pseudodifflugia africana, feeding on a Closterium – Drawing A. A. De Groot, collection Ferry Siemensma
Difflugia rubescens
Diffliugia rubescens – 70m long, with cyst; Austria, Tirol
Difflugia rubescens
Difflugia rubescens with double pseudostome
Difflugia rubescens
Difflugia rubescens, 75 µm; Tirol, Austria
Difflugia rubescens
Difflugia rubescens, total length 154 µm – Tirol, Austria
Difflugia rubescens pseudostome
Difflugia rubescens pseudostome
Difflugia rubescens, Haaksbergen, Netherlands 2018

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