world of amoeboid organisms


Vannella mira (Schaeffer, 1926) emend. Smirnov, 2002

Diagnosis: In locomotion fan-shaped, semicircular or (rarely) spatulate. Prominent folds or lobes on the frontal hyaloplasm. Single vesicular nucleus, about 6 µm diameter with central spherical endosome about 3 µm diameter. Floating form non-symmetrical, with up to 11 straight or coiled pseudopodia, often with distinct conical thickening of the basement. Pseudopodia of the floating form have rounded, not pointed ends and are relatively thick.

Dimensions: Length and breadth of the locomotive form 15-35 µm; (average length 28.5 µm; average breadth 26.5 µm) l/b ratio 0.5-1.8 (average 1.08).

Ecology: bacteriovorous. Marine, brackish water. Ecotopes: cyanobacterial mats, known from shallow coastal waters, bays, tide pools, coral reefs. Distribution: Atlantic and Pacific US coats, Florida, Madagascar, Camarque (France, Mediterranean coast).

Remarks: diagnosis: similar in size with V. septentrionalis, V. arabica, V. caledonica and V. anglica. Differs from all these species in the organization of the floating from. In addition, V. arabica has distinct simple filaments among glycostyles, that were not found in V. mira (this feature may be not very reliable). V. anglica has a characteristic uneven frontal edge, that is not a feature of V. mira (see Page, 1979).

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 »