Microworld

world of amoeboid organisms

Menu
Difflugia globulosa
Difflugia globulosa, 70 µm, stacked image

Difflugia globulosa (Dujardin, 1837) Penard, 1902  – Small species

Diagnosis: Shell light to dark brown, spherical, composed of small and large quartz particles but may also include diatom frustules, fungal spores and hyphen and other debris; general appearance rough; aperture broad and circular, surrounded by smaller particles which form a more or less thickened collar. Pseudopodia lobose. Nucleus not observed.

Dimensions: Diameter of the shell 61-70 µm (n=10); height 66-72 µm; aperture 32 µm, half the diameter of the shell.

Ecology: Peatbog, between wet sphagnum; Naardermeer, the Netherlands, 2019.

Remarks: This species thrived well in a wet mount kept in a moist chamber for some weeks. It multiplied relatively fast, but it is a very slow moving species. I’ve never seen it moving, but if I looked at the wet mount from time to time I could see that they had moved.
This species resembles one of the forms described by Penard (1902) who described D. globulosa as having two distinct forms, the typical form and one varying between 135 and 155 µm and two smaller forms 50 to 70 µm in size.

Difflugia globulosa
Difflugia globulosa, stacked image
Difflugia globulosa
Difflugia globulosa, with pseudopodia
Difflugia globulosa
Stacked image showing the thicked border (below) around the aperture.
Difflugia globulosa
Difflugia globulosa, division
Difflugia globulosa
Difflugia globulosa, living specimen
Recent posts

Penardochlamys arcelloides

P. arcelloides – after Penard, 1904 Penardochlamys arcelloides  (Penard, 1904) Deflandre, 1953 Diagnosis: Colorless or very slightly yellowish envelope, bag or cauldron-shaped, very thin, chitinous,

Read More »

Reticulomyxa hannae

R. hannae, plasmodium – photomicrograph Steffen Clauss Reticulomyxa hannae Völcker and Clauß, 2020 Diagnosis: Trophozoites surrounded by a very thin mucous envelope, with slowly moving plasmodia, variable

Read More »

Velamentofex saxonensis

V. saxonensis, feeding (photomicrograph Steffen Clauss) Velamentofex saxonensis Völcker and Clauß, 2020 Diagnosis: Trophozoites ovoid, 30-95 μm, granuloreticulopodia up to 1000 μm long. with a hyaline, thin

Read More »

Velamentofex tyrolensis

V. tyrolensis (photomicrograph Steffen Clauss) Velamentofex tyrolensis Völcker and Clauß, 2020 Diagnosis: Trophozoites ovoid, 98-125 μm, with reticulopodia up to 300 μm long, with a hyaline,

Read More »

Velamentofex berolinensis

V. berolinensis Velamentofex berolinensis Völcker and Clauß, 2020 Diagnosis: Trophozoites ovoid, 50-300 µm, with a hyaline, extremely flexible, membranous test. Nuclei numerous, 11.6-16.2 µm in diameter,

Read More »

Lieberkuehniidae

 Lieberkuehniidae  Siemensma, Holzmann, Apothéloz-Perret-Gentil, Clauß, Voelcker, Bettighofer, Khanipour Roshan, Walden, Dumack and Pawlowski, 2020 Diagnosis: Multinucleate organic-walled monothalamous foraminifera. Test very flexible, elongated to broadly

Read More »