world of amoeboid organisms

Cyclopyxis kahli var. cyclostoma
Cyclopyxis kahli var. cyclostoma  – after Bonnet et Thomans, 1960

Cyclopyxis kahli var. cyclostoma Bonnet et Thomans, 1960

Diagnosis: The type as defined by Deflandre, 1929, has an irregular, more or less jagged, contour due to irregular mineral particles overflowing the border of the aperture. The pseudostome of the variety cyclostoma is without such irregular and overflowing elements; it is not always circular, and often has an irregular contour, but not lobed. The connection of the side wall to the dorsal wall, visible during lateral observation, appears less clearly angular than in the type. Structure of the test wall similar to that of the type in general.

Dimensions: Test diameter 80-100 µm; height 50-60 µm; pseudostome diameter 12-30 µm.

Ecology: Rhizosphere of Brachypodiμm rainosμm on micaschists, near Paulilles (Pyrénées-Orientales). Algeria: marshes near La Calle and ponds of Reghaïa near Algiers (unpublished docμments L. Gauthier-Lièvre).


Recent posts

Penardochlamys arcelloides

P. arcelloides – from Penard, 1904 Penardochlamys arcelloides  (Penard, 1904) Deflandre, 1953 Diagnosis: Colorless or very slightly yellowish envelope, bag or cauldron-shaped, very thin, chitinous,

Read More »

Reticulomyxa hannae

R. hannae, plasmodium – photomicrograph Steffen Clauss Reticulomyxa hannae Völcker and Clauß, 2020 Diagnosis: Trophozoites surrounded by a very thin mucous envelope, with slowly moving plasmodia, variable

Read More »

Velamentofex saxonensis

V. saxonensis, feeding (photomicrograph Steffen Clauss) Velamentofex saxonensis Völcker and Clauß, 2020 Diagnosis: Trophozoites ovoid, 30-95 μm, granuloreticulopodia up to 1000 μm long. with a hyaline, thin

Read More »

Velamentofex tyrolensis

V. tyrolensis (photomicrograph Steffen Clauss) Velamentofex tyrolensis Völcker and Clauß, 2020 Diagnosis: Trophozoites ovoid, 98-125 μm, with reticulopodia up to 300 μm long, with a hyaline,

Read More »

Velamentofex berolinensis

V. berolinensis Velamentofex berolinensis Völcker and Clauß, 2020 Diagnosis: Trophozoites ovoid, 50-300 µm, with a hyaline, extremely flexible, membranous test. Nuclei numerous, 11.6-16.2 µm in diameter,

Read More »


 Lieberkuehniidae  Siemensma, Holzmann, Apothéloz-Perret-Gentil, Clauß, Voelcker, Bettighofer, Khanipour Roshan, Walden, Dumack and Pawlowski, 2020 Diagnosis: Multinucleate organic-walled monothalamous foraminifera. Test very flexible, elongated to broadly

Read More »