world of amoeboid organisms

Menu

 

Difflugia claviformis
Difflugia claviformis, front and side view, 424 µm

Difflugia claviformis (Penard, 1902)

Diagnosis: test pyriform, compressed, with a distinct aboral protuberance, colorless, composed of small to large pieces of quartz; pseudostome surrounded by small particles.

Dimensions: Penard (1902) 380-450 µm; my measurements: 380-434 µm.

Ecology: In sediments of ditches.

Remarks: Shells of Difflugia claviformis seem to be rare. I found this species only in the sediment of a ditch in the nature reserve Naardermeer in the Netherlands. I am not convinced that this is a separate species. I always found it together with specimens of Difflugia nodosa. Probably both species are identical. Further records are necessary.

Difflugia claviformis
Tests 412 and 403 µm high; Naardemeer, Netherlands.

I’m not convinced that the species below belong to D. claviformis.

Difflugia claviformis
Shells 461-448 µm, stacked image. I found this large en remarkable shells in sediment of a small mountain lake near Lolo Pass, Montana USA. It differs from every shell I’ve seen before. One shell was symmetrical and the other asymmetrical.
Difflugia claviformis
Difflugia claviformis
Pseudostome and neck
Difflugia claviformis
Difflugia claviformis
The same Difflugia compared with some other species in the same sample from Lolo Pass, 98-461 µm.
Difflugia claviformis
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 »