world of amoeboid organisms


Vexillifera multispinosa Dykova et al, 2012

Diagnosis: variable in shape, with numerous (up to 15), sharp pointed hyaline subpseudopodia of different length (up to 15 µm). Actively moving trophozoites always longer than broad. Granuloplasm with clearly visible refractile crystalline inclusions, nucleus of variable shape and contractile vacuole surrounded by small vesicles resembling narrow spongiom. Rim of hyaloplasm that gives rise to subpseudopodia relatively narrow. Outer layer of cell surface with regularly arranged T-shaped 20 nm long glycostyles; subpseudopodia with microfilamentous core. Nuclear membrane disappearing during nuclear division.

Dimensions: Length excluding subpseudopodia 10-20 µm.

Ecology: From gills of the banded leporinus Leporinus fasciatus (Bloch, 1784) caught in the Amazon River (Peru, Iquitos)

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 »