Microworld

world of amoeboid organisms

Menu
Difflugia ovalisina
Difflugia ovalisina, from Chardez & Beyens 1994

Difflugia ovalisina  Chardez & Beyens 1994

Diagnosis: Shell oval, with a circular cross-section. The aperture is truncated at a right angle; the border shows a slight swelling (rim), sometimes slightly re-curved to the interior. The organic cement is transparent with a yellowish tint, encrusted with small flattish pieces, and with a few siliceous elements and diatoms added. Cytoplasm limpid, lobose pseudopodia, spherical nucleus.

Dimensions: Length 25-29 µm, width 18-28 µm; diameter of pseudostome: 9-15 µm; height of rim 1.5-2.2 µm, diameter of nucleus 15 µm (n = 8).

Ecology: Freshwater, Devon Island.

Remarks: This small species resembles Difflugia saxicola Penard, but differs mainly from the latter by aperture which is truncated at a right angle and provided with a slight, mostly re-curved rim.

Reference:

Recent posts

Penardochlamys arcelloides

P. arcelloides – from 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 »