Microworld

world of amoeboid organisms

Menu
Cyclopyxis ambigua
Cyclopyxis ambigua after Bonnet et Thomas, 1960

Cyclopyxis ambigua  Bonnet et Thomas, 1960

Diagnosis: Test chitinoid, light cracked, of general shape reminiscent of that of Geopyxella sylvicola Bonnet and Thomas, with which is may be confused. Pseudostome is very slightly invaginated, rarely circular, very often small and irregular. Circular front view. Test incorporated with irregular siliceous elements and frequently mixed with organic (e.g. fungal) particles as in Trigonopyxis arcula (Leidy).

Dimensions: Diameter 40-55 µm. Height: 42-45 µm. Diameter of the pseudostome: 10-15 µm.

Ecology: Species found in abundance in soil (granitic arena) under Polypodium sp., near the pass of the Descargue (Pyrénées-Orientales).

Remarks: Decloitre (1965) describes C. ambigua var. aplanata, which is characterized by its small size (12-15 µm).

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

 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 »