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

Read More »

Haplomyxa spec

Fig. 1: Main cell body of specimen A, partly hidden by debris Haplomyxa sp. Three specimens were observed in a Petri dish, along with two

Read More »

Lachmannia spec.

“Lachmannia” spec., body length 127 µm “Lachmannia” spec. I found two cells, size about 125 µm when ovoid, with an organic-walled membranous test and a

Read More »

Diplophrys spec. 7

Diplophrys spec., with three tufts of filopodia Diplophrys spec. These cells are granular, never seen before. I found them in a sample from the Bert

Read More »

Psammonobiotus spec.

I found this specimen in a sample from the Oppad, near Hilversum, 2020. It is similar to Psammonobiotus linearis, but lacks a clear spine at

Read More »

Sphenoderia compressa

Sphenoderia compressa, after Badewitz, 2002 Sphenoderia compressa Badewitz, 2002 Diagnosis: Test ovoid, oval in cross section, hyaline, covered with relatively small, oval, rather irregularly arranged

Read More »