world of amoeboid organisms

Yogsothothidae Yogsothoth carteri
Yogsothoth carteri, after Shishkin and Zlatogursky, 2018

Yogsothoth carteri Shishkin and Zlatogursky, 2018

Diagnosis: Individual cells in a colony have a diameter of 9.7-15.2 µm; covered by flattened plate-scales (2.9-3.8 x 1.3-1.8 µm) with an axial rib (2.0-2.8 µm) and inflected margin. The colony is surrounded by a thick layer of pot-like outer scales (1.7-4.0 x 1.4-3.2 x 1.4-3.1 µm) with an axial rib (0.9-2.0 µm) and numerous conical papillae on its outer surface, forming concentric irregular rings. On the reverse side of the scale is a large opening (0.9-2.7 x 0.8-2.3 µm). L/W, L/Hand W/H ratio of scale is respectively 1.08; 1.30; 1.2. L x W of the opening/L x W of the scale ratio is 0.37.

Ecology: Marine. Gulf of Aqaba shore, Israel (N29.50; E34.92).

Remarks: Y. knorrus is very similar to Y. carteri in general features, but has smaller, more elongated and lower volume outer scales with a broader opening. Inner scales of Y. knorrus are smaller and less elongated (L/W ratio 2 in comparison to 3 in Y. carteri).

Yogsothothidae Yogsothoth carteri
Yogsothoth carteri, scales, after Shishkin and Zlatogursky, 2018
Recent posts


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 »