world of amoeboid organisms


Lecythium jennyae Mausbach, Dumack et Bonkowski, 2016

Diagnosis: Lecythium as above. Test: round or spherical in shape, 24-42 µm (length), 29-48 µm (width), length/width ratio 0.7-1, often deformed due to folds. Nucleus: ellipsoid or spherical, marbled structure, about 12.8-19.5 µm, located at the apical end of the cell; nucleolus not detectable. Granules: about 0.96-2.9 µm, round, dispersed all over the cell. Vacuoles: contractile vacuoles dispersed all over the cell, food vacuoles restricted to the basal end. Aperture: roundish, filopodia arise directly from the aperture and not from a vacuolated cytoplasm, like in L. hyalinum. Locomotion: actively creeping, filopodia rarely extend longer than 60 µm. Cell division: longitudinal, binary.

Ecology: Prey: unicellular algae, no ingestion of bacteria observed. Type locality: urban pond in a park at Cologne-Mühlheim, Germany.

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  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 »