world of amoeboid organisms

Menu
Microgromia socialis
Microgromia socialis, mother-cell brown, arrowed.

Microgromia socialis Hertwig & Lesser, 1874

Diagnosis: Shell ovoid or nearly spherical, with a short tubular neck. Pseudopodia long, branching and anastomosing, arising from a peduncle at the aperture. Nucleus spherical, with central nucleolus; nucleus relatively large. Contractile vacuole near aperture. Often numerous individuals are grouped into a colony, fusing granulopodia; multiplication by fission and also by swarmers.

Dimensions: Diameter 20-35 µm. My measurements: 11.1 – 15.3 µm (mean 11.6 µm); nucleus c. 5 µm.

Ecology: Fresh water, different water types; in sediments and among vegetation.

Remarks: It is not clear if there is one species or that the species name covers several species. I think that the latter is true.

Microgromia socialis
The brown cell is probably the mother-cell
Microgromia socialis
Network of granulopodia
Microgromia socialis
Network of granulopodia
Microgromia socialis
Network of granulopodia, detail; bidirectional streaming of granules.
Microgromia socialis
Microgromia socialis
Spherical and ovoid shaped shells
Microgromia socialis
Recent posts

Chlamydophrys-schaudinn

Fritz Schaudinn (1871 – 1906) was a German zoologist. He was the co-discoverer of the causative agent of syphilis and did research on amoebas, particularly

Read More »

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 »