world of amoeboid organisms


Cochliopodium minutoidum Kudryavtsev, 2006

Diagnosis: Length in locomotion 8.4-19.5 um (average 14 um), breadth, 9.3-24 um (average 17.3 µm), length : breadth ratio, 0.58-1 (average 0.83). Oval to triangular; wide, uneven hyaloplasmic veil with numerous waves and subpseudopodia; few short trailing filaments. Spherical vesicular nucleus, 2.8-4.7 µm in diameter (average 3.7 µm), with large central nucleolus, 1.4-2.3 µm in diameter (average 1.8 µm). Occasionally 2-3 nuclei. Scales consist of a circular base plate with a square mesh grid pattern, a central column of four stalks, converging towards the top; funnel-shaped apical part consists of 14-17 radial spokes and numerous thin concentric rings. Diameter of the base plate, 0.49-0.63 µm (average 0.56 µm), of the apical part, 0.47-0.6 µm (average 0.54 µm), height of a scale 0.26-0.3 µm.

Ecology: Freshwater; bank of the Saba river, Leningrad Region, North-Western Russia, wet moss Aulocomnium sp. and organic matter from dead spruce trees (Picea sp.).

Remarks: In the general pattern of the scale C. minutoidum is similar to C. barki, C. actinophorum and C. minus. Differs from C. barki in having smaller scales with fewer spokes in the apical part, size of the locomotive form, broader hyaloplasmic veil, fewer trailing filaments and lack of the layer of refractile granules around the nucleus; from C. actinophorum, in the size and proportions of the scales, size of the locomotive form, presence of subpseudopodia in locomotion and lack of the layer of refractile granules around the nucleus; from C. minus, in the apparent presence of hyaloplasm at the posterior margin of the cell, the proportions of the scales and the structure of their central columns.

Recent posts

Nebela golemanskyi

N. golemanskyi, after Todorov, 2010 Nebela golemanskyi Todorov, 2010 Diagnosis: Shell large, colourless and pyriform, with a distinct short neck about one fourth of the

Read More »

Nebela nebeloides

N. nebeloides, after Gauthier-Lièvre and Thomas, 1958 Nebela nebeloides (Gauthier-Lièvre and Thomas, 1958) Todorov et al., 2010 Basionym: Difflugia nebeloides Gauthier-Lièvre and Thomas, 1958 Diagnosis:

Read More »

Difflugia biwae

D. biwae, after Yang and Shen, 2005 Difflugia biwae Kawamura, 1918 Diagnosis: Shell in lateral view fusiform in outline with a straight neck, a conspicuous

Read More »

Difflugia mulanensis

D. mulanensis, after Yang et al., 2015 Difflugia mulanensis Yang, Meisterfeld, Zhang and Shen, 2015 Diagnosis: Shell elongate ovoid like a vase, with a distinct

Read More »

Euglypha bryophila

Euglypha bryophila, after Brown, 1911 (L), from Ecuador (R) Euglypha bryophila  Brown, 1911 Diagnosis: (Original description) The test is very regular in form and subject

Read More »


(A) A Scenedesmus cell (arrow) is engulfed by a trophozoite. (B) Several Scenedesmus cells adhere to the surface of a plasmodium that has numerous vacuoles

Read More »