world of amoeboid organisms

Menu
Leptophrys elegans
Arboramoeba reticulata, photomicrograph Eckhard Voelcker

Genus Arboramoeba Geisen, Bass & Berney, 2015

Diagnosis: Multinucleate, highly branching and reticulate naked amoebae. Cell body not really distinct; nuclei and other cell contents are distributed across the whole network. The network is significantly more complex at the anterior front, forming a wide, very densely reticulate, non-permeable frontier where prey phagocytosis occurs, leaving behind a nearly sterile zone as the cell moves forward. The posterior part of the cells is much less reticulate and branching, with one or few non-branching, non-filose posterior endings. Branching, filose-like, pseudopodia are mostly present at the anterior front of the cell, but can also be found in other parts of the network, regularly fusing with other parts of the cell. Very strong vacuolar activity across the whole network. Movement of entire cells too slow to be directly observable. No distinct floating form was observed; cells retain their complex shape when carefully detached from the substratum. Cysts with two clearly separate walls varying both in size and shape (never perfectly round, often ovoid).
Type species: Arboramoeba reticulata

Leptophrys elegans
Photomicrograph Eckhard Voelcker – from Sphagnum, Germany
Recent posts

Quadrulella scutellata

Quadrulella scutellata, after Wailes, 1912 Quadrulella scutellata  Wailes, 1912 Diagnosis: Test moderately large, hyaline, pyriform, compressed; composed of small siliceous, rectangular plates arranged in irregular

Read More »

Mrabella plicata

M. plicata, after Hoogenraad and De Groot, 1940 Mrabella plicata (Hoogenraad and De Groot, 1940) Diagnosis: Test made of small square plates, between which some

Read More »

Quadrulella alata

Q. alata, after Gauthier-Lièvre, 1957 Quadrulella alata  Gauthier-Lièvre, 1957 Diagnosis: In frontal view, the test is lageniform, with a broadly rounded fundus (subcircular or ovoid)

Read More »

Quadrulella acuminata

Quadrulella acuminata, after Van Oye, 1958 Quadrulella acuminata  Van Oye, 1958 Diagnosis: Test rather pyriform with a stretched base with converging sides, very slightly concave

Read More »