Difflugia-lebes
Difflugia lebes, 239 µm

 
Difflugia lebes Penard, 1899

Diagnosis: Neck sometimes indistinct, aperture large and entire. Shell very fragile, covered with siliceous flattened particles. Collar straight, rarely recurved (= var. elongata Penard). Sometimes more than 100 nuclei.

Dimensions: One of the greatest Difflugia, some reaching 400 µm in length, or more. My measurements: 235-239 µm (n=4)

Ecology: Feeds on large diatoms. Habitat ooze at the bottom of lakes, ponds.

Remarks: Though Penard mentions this a very large species, specimens in one of his stained slides (see below) are not larger than 279 µm. I’m not sure if this is a true species. What is the difference with with tests of D. urceolata with a less developed collar?

Difflugia lebes
Difflugia lebes
Difflugia lebes
Difflugia lebes
Left: Drawing by Penard in Faune Rhizopodique (1902); Right: 235 µm high – Crailoo
Difflugia lebes
Difflugia lebes, 279 µm. Collection of Eugène Penard: this specimen of Difflugia lebes was stained and mounted by Penard. He send this slide to the late Dr. A.A. De Groot, who was so kind to gave it to me.

 

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