Microworld

world of amoeboid organisms

Menu

Centropyxis cordobensis

C. cordobensis, after Vucetich, 1976

Centropyxis cordobensis  Vucetich, 1976

Diagnosis: Test very large and robust, with broad oval outline in ventral view; side view is high, curved strongly toward the ventral region. In dorsal view the aperture is visible as a semi-circular line. Pseudostome eccentric, oval with an internal chitinous flange. Test composed of exogenous siliceous particles of different size and detritus, all adhering to a dark chitinous cement.

Dimensions: Length: 2б0-285 µm; height: 190-210 µm; At = 200-210 µm; S = 100-110 x 120-135; At / L = 0.75 to 0.76.

Ecology: Described from Suquía, Согdоbа, without additional information. I have found similar specimens in sediment of ditches near the Naardermeer, the Netherlands, but I think that these belong to C. ecornis.

Remarks: According to Vucetich the most similar species is Centropyxis gibba Deflandre, from which it differs by the inclination of the dorsal curvature, the shape and structure of its pseudostome and its much larger dimensions. Limnobios, Vol. 1. FASC. 2 (1976). Holotype: 182 Nr prepared deposited in the collection of the Institute of Limnology Tecamebianos.

Recent posts

Kibisidytes

K. marinus, after Jepps, 1934 Kibisidytes marinus Jepps, 1934 Diagnosis: Small amoeboid organism occurring in the sea, attached to the surface film or to some

Read More »

Phaeobola

P. aeris from Dumack et al., 2000 Phaeobola Dumack et al., 2000 Diagnosis: Cells roundish to oval shaped. Shell colorless to amber-colored, rough surface, few

Read More »

Rhizaspis armata

R. armata, 68 µm long, excl. spines – Laegieskamp Rhizaspis armata (Lauterborn, 1901) Dumack et al., 2021 Basionym: Pamphagus armatum Lauterborn, 1890 Diagnosis: Theca membranous,

Read More »

Rhizaspis spinosa

The original description with original drawings, Penard, 1890. Rhizaspis spinosa (Penard, 1890) Dumack et al., 2021 Basionym: Trinema spinosum Penard, 1890 Diagnosis: Theca membranous, ovoid

Read More »

Difflugia “pseudoclaviformis”

Difflugia “pseudoclaviformis”, front and side view, 424 µm Difflugia “pseudoclaviformis” Diagnosis: Shell pyriform, compressed, with a more or less pronounced aboral protuberance; shell composed of

Read More »

Difflugia from Lolo Pass

Shells 461-448 µm, stacked image. I found this large en remarkable shells in sediment of a small mountain lake near Lolo Pass, Montana USA. It differs

Read More »

Foraminifer drome

Unknown species, collected from the river Drôme, France, 2021 Unknown species September 2021, I found about ten specimens of an agglutinated foraminifer in a sample

Read More »

Cyclopyxis spec

Cyclopyxis spec., 168 µm Cyclopyxis spec. Diagnosis: Shell circular in ventral and dorsal view, more or less hemispherical in lateral view (height/diameter ≈ 0.5); lateral

Read More »

Difflugia fallax

Difflugia fallax, from Penard, 1902 Difflugia fallax Penard, 1890 Diagnosis: Shell hyaline or yellowish-greenish, black at low magnification, round in cross section, formed of a

Read More »