world of amoeboid organisms

Menu
Polychaos spec
Polychaos spec.

Polychaos spec.

Diagnosis: Large amoeba with an irregular more or less polypodial shape during slow locomotion; uroid finely papillated, usually very large fasciculate uroid; crystals small, paired like in Mayorella species; broad monopodial form during rapid locomotion; nucleus spherical, with large eccentrically placed nucleolus which has a rough or irregular surface. One large contractile vacuole.

Dimensions:  About 300 µm long, nucleus 40 µm; nucleolus 28 µm; crystals < 2 µm (n=1).

Ecology: Freshwater. In an old peat bog, in sediment of the Ganzenpoel, the Netherlands, 2019.

Remarks: I have only seen one specimen. It is not possible to tell from that single observation whether this is an undescribed species or just an aberrant form with regard to the shape and structure of the nucleus.

Polychaos
Polychaos spec., nucleus
Polychaos spec
Polychaos spec.
Polychaos spec
Nucleus
Polychaos spec
Polychaos spec.
Polychaos spec
Polychaos spec.
Polychaos spec
Polychaos spec., nucleus
Recent posts

Alabasta longicollis

Alabasta longicollis, after Penard, 1890 Alabasta longicollis  (Penard, 1890) Diagnosis: Test pyriform, very elongated (3 times as long as wide), transparent, very little compressed, embedded

Read More »

Alabasta kivuense

Alabasta kivuense, after Gauthier-Lièvre and Thomas, 1961 Alabasta kivuense  Gauthier-Lièvre and Thomas, 1961 Diagnosis: In frontal view, the test is finger-shaped with subparallel sides, the

Read More »

Paulinella micropora

Paulinella micropora, – from Lhee et al., 2017 Paulinella micropora Lhee, Yang, Kim, Andersen & Yoon, 2017 Diagnosis: Test elongate, with five columns of scales,

Read More »

Quadrulella tubulata

Quadrulella tubulata, after Gauthier-Lièvre, 1953 Quadrulella tubulata  Gauthier-Lièvre, 1953 Diagnosis: Shell almost lageniform, compressed, with rounded fundus and more or less irregularly arranged, commonly small,

Read More »

Quadrulella elongata

Quadrulella elongata, after Van Oye, 1952 Quadrulella elongata  Van Oye, 1952 Diagnosis: Test elongated with long neck and square plates, without any pores. Pseudosome slightly

Read More »

Quadrulella scutellata

Quadrulella scutellata, after Wailes, 1912 Quadrulella scutellata  Wailes, 1912 Diagnosis: Test moderately large, hyaline, pyriform, compressed; composed of small siliceous, rectangular plates arranged in irregular

Read More »