Phisochila griseola
Physochila griseola, 86 µm long – Loosdrecht

 

Genus Physochila Jung, 1942

Diagnosis: shell pyriform, slightly compressed, surface with indentations and covered with siliceous exogenous plates; aperture more or less circular, with an recurved collar. Nucleus ovular.
Type species: Psysochila griseola (Wailes & Penard, 1911)

 

 

Physochila griseola (Wailes & Penard, 1911)

Diagnosis: shell pyriform or ovoid, slightly compressed, mainly of oval or polygonal plates; aperture circular, with an strongly outward curved collar.

Ecology: in Sphagnum swamps, mosses. I have found numerous shells in samples from a peat bog along the Bert Bos path in Loosdrecht, in the central part of the Netherlands, September 2012.

Dimensions: shell 70-85 µm long, mean 75 µm (Deflandre, 1926). My measurements 78-86 µm.

Remarks: If you look carefully at the picture above, you can see that the collar seems to curve inward.

Physochila griseola

Physochila griseola, 78 µm long
Physochila griseola
Physochila griseola – Austria, Tirol
Recent posts

Difflugia acuminate tests

Acuminate tests Tests with one or more spines or bud-like or conical protuberances or just a pointed fundus D. acuminata D. congolensis D. ventricosa D.

Read More »

Difflugia subaequalis

Difflugia subaequalis, from Penard, 1910 Difflugia subaequalis  Penard, 1910 Diagnosis: Test almost spherical, slightly elongated, with a wide pseudostome, almost as wide as the test

Read More »

Difflugia spherical tests

 Difflugia ampullula, after Playfair, 1918  Difflugia ampullula  Playfair, 1918 Diagnosis: Test broadly ovate, with hemispherical fundus, and sides gradually converging in almost straight lines to

Read More »

Difflugia stepaneki

Difflugia stepaneki, from Hager and Haagerova, 1970 Difflugia stepaneki  Hager and Haagerova, 1970 Diagnosis: Test broad elliptical, circular in cross-section, with a short neck that

Read More »