Cochliopodium kieliense Kudryavtsev, 2006

Diagnosis: Length in locomotion 9-22 µm (average 13 µm), breadth, 11-30 µm (average, 18 µm), length : breadth ratio 0.44-1.07 (average, 0.72). Oval, triangular, or fan shaped, often with uneven frontal and lateral margins of the hyaloplasm, but usually without subpseudopodia. Trailing filaments often present at the posterior margin. Spherical vesicular nucleus, 3-5 µm in diameter (average 3.5 µm), with central nucleolus, 1-2 µm in diameter (average 1.4 µm). Occasionally up to 5 nuclei. Scales consist of a grid-like base plate 0.65-0.75 µm in diameter, with a loose mesh, 5 stalks attached to the periphery of the base plate and fusing in the center to form a central core ca. 0.065 µm in length, and an apical part in the form of a basket of 5 branching radial spokes attached to the peripheral ring 0.55-0.65 µm in diameter. Height of the scale, 0.42-0.45 µm.

Observed habitats: bottom sediments of the freshwater pond near Biozentrum building at the University of Kiel (Kiel, Northern Germany).

Remarks: In the general pattern of the scale structure C. kieliense is similar to C. spiniferum Kudryavtsev, 2004, Cochliopodium sp. 3 (Bark 1973), and C. maeoticum described here. To the last species, it is also similar in size and in the light-microscopical features of the locomotive form. Differs from all these species in the structure of the apical part of the scale and lack of the apical spine. Similar to C. minutoidum in the size and shape of the locomotive form, but differs from this species in the scale structure and the absence of subpseudopodia in locomotion.

Recent posts

Difflugia australis

D. australis after Playfair, 1917 Difflugia australis (Playfair, 1917) Gauthier-Lièvre et Thomas, 1958 Syn.: Difflugia bacillariarum var. australis Playfair 1917 Diagnosis: Test broadly ovate, with

Read More »

Difflugia baradlana

D. baradlana after Varga, 1963 Difflugia baradlana Varga, 1963 Diagnosis: Test ovoid with a very small neck which is about 1/4 of the test length.

Read More »

Difflugia angelica

D. angelica after Gauthier-Lièvre et Thomas, 1960 Difflugia angelica Gauthier-Lièvre et Thomas, 1960 Diagnosis: Test spherical, slightly mammillated. Pseudostome regularly lobed like a star with

Read More »

Difflugia algaephila

D. algaephila after Decloitre, 1977 (l) and Chardez (1980) Difflugia algaephila Decloitre, 1977 Diagnosis: Test ovoid, neatly pointed, with oblique round pseudostome. Dimensions: Length 73-75

Read More »

Difflugia key spherical

Spherical tests Tests that are more or less spherical, some with a collar, but all without spines or other outgrowths. The aperture or pseudostome is

Read More »

Difflugia key compressed

Compressed tests Compressed tests are more or less oval or elliptical in cross-section. The aperture is round or oval or even lobed. This group has no

Read More »