Microworld

world of amoeboid organisms

Menu
Centropyxis ecornis
Centropyxis ecornis, 258 and 326 µm in diameter – Laegieskamp

Centropyxis ecornis  (Ehrenberg, 1841)

Diagnosis: shell of large size, usually more than 200 µm, usually circular or largely elliptical, mostly irregular in outline; in lateral view the dorsal region is spherical and tapers from the mid-body position to the apertural lip; shell rough, covered with quartz sand grains, embedded in an organic cement; color usually grey, sometimes brownish, depending upon the density of the xenosomes; aperture invaginated, oval or circular, irregularly lobed, not very much eccentric, with a thick apertural rim.

Dimensions: literature 199-316 µm , mean 211 µm; my measurements 167-356 µm.

Ecology: freshwater; in sediments and among water plants and mosses.

Remarks: Probably several species are covered by the name C. ecornis. C. cordobensis might have been confused with this species.

Centropyxis ecornis
Centropyxis ecornis
C. ecornis, left: side view, 277 µm broad; left: dorsal view, 257 µm in diameter – Crailoo
Centropyxis ecornis
Centropyxis ecornis
C. ecornis, sideview; left: 257 µm in diameter and 200 µm high; right: 258 µm in diameter – Crailoo
Centropyxis cordobensis

7

C. cordobenis, after Vucetich, 1976. Compare his drawing (r.) with the specimen above (r.).
Centropyxis ecornis
Centropyxis ecornis
C. ecornis, 289 and 257 µm in diameter – Crailoo
Centropyxis ecornis
Centropyxis ecornis, 244 µm in diameter – stacked image
Centropyxis ecornis
Centropyxis ecornis, 291 µm in diameter – stacked image
Centropyxis ecornis
Centropyxis ecornis, 294 µm in diameter – stacked image
Centropyxis ecornis
Centropyxis ecornis, after Deflandre, 1929
Centropyxis ecornis
Centropyxis ecornis, after Leidy
Centropyxis ecornis
Centropyxis ecornis, after Leidy
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 »