Pseudawerintzewia – Microworld

P. orbistoma from Croatia (l) and after Schönborn et al. 1983

Genus Pseudawerintzewia Bonnet, 1959

Diagnosis: Test oviform; cross-section circular, brown, attached quartz particles. Pseudostome elliptical or round, in flattened center of the broader end, thickened lip, no collar.
Type species: Pseudawerintzewia calcicola Bonnet, 1959.
Four species: P. orbistoma is similar to the type species but with a circular pseudostome.

Ecology: Feeding herbivorous? Usually P. calcicola and P. orbistoma are associated with calcareous soils (Bonnet, 1989).

Pseudawerintzewia calcicola – from Meisterfeld, 2002

Ferry Siemensma
Created April 26, 2019
Last updated January 31, 2021

Difflugia new species

April 16, 2021

Difflugia sp. nov. 273-307 µm Difflugia sp. nov. Diagnosis: Shell elongated oblong, usually with a distinct neck, composed of much smaller particles than the rest

Euglypha bryophila

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Euglypha bryophila, after Brown, 1911 (L), from Ecuador (R) Euglypha bryophila Brown, 1911 Diagnosis: (Original description) The test is very regular in form and subject

Vernalophrys

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(A) A Scenedesmus cell (arrow) is engulfed by a trophozoite. (B) Several Scenedesmus cells adhere to the surface of a plasmodium that has numerous vacuoles

Actinosphaeridium spec.

February 24, 2021

Actinosphaeridium spec. Diagnosis: Cell surrounded by a membranous shell, with an outer mucous layer. Filopodia with granules, sometimes branching. Cell stalked. Ecology: I found this

Euglyphidion

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Euglyphidion enigmaticum – after Bonnet, 1960 Genus Euglyphidion Bonnet, 196 Diagnosis: Shell hyaline, ovoid, pseudostome circular or slightly elliptical. Shell loosely covered with two types of

Leptomyxa spec.

February 16, 2021

Leptomyxa sp., slowly retracting in response to the light of the microscope Leptomyxa sp. Diagnose: This is a very large amoeba which I found in

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