Microworld

world of amoeboid organisms

Menu
Centropyxis discoides
Centropyxis discoides – stacked

Centropyxis discoides  Penard, 1902

Diagnosis: Shell usually more or less circular in outline, sometimes irregular, strongly flattened, dish shaped; usually with some hollow spines in the fundus region; shell composed of a granular organic material, embedded with some xenosomes, but never fully covered; aperture sometimes nearly centrally, irregular or lobed; some small pillars connect the invaginated aperture border with the dorsal surface. One single granular nucleus.

Dimensions: 135-320 µm

Centropyxis discoides
Centropyxis discoides
C. discoides, both from the same sample – on submerged plants, the Netherlands
Centropyxis discoides
Centropyxis discoides
Nucleus and detail of edge
Centropyxis discoides
Centropyxis discoides
Specimen (235 µm) from Crailoo
Centropyxis discoides
Centropyxis discoides
C. discoides, 286 and 260 µm, both from the same sample
Centropyxis discoides
Centropyxis discoides
C. discoides, 225 and 245 µm in diameter, the Netherlands
Centropyxis discoides
C. discoides, side view, 253 µm in diameter
Centropyxis discoides
C. discoides, without spines, feeding on an algae
Centropyxis discoides
C. discoides, 226 µm, with many spines – Laegieskamp
Centropyxis discoides
Centropyxis discoides, 196 µm – Naardermeer
Centropyxis discoides
C. discoides, 235 µm
Centropyxis discoides
C. discoides, 224 µm – Crailoo
Centropyxis discoides
C. discoides, 248 µm – Crailoo
Centropyxis discoides
C. discoides, 245 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 »

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 »