Microworld

world of amoeboid organisms

Menu
Deuteramoeba-algonquinensis
D. algonquinensis, the Netherlands

Genus Deuteramoeba Page, 1987

Diagnosis: Smaller polypodial Amoebidae with the nucleolar material in fewer pieces than in Amoeba, with fibrous inner nuclear lamina not organised in the honeycomb pattern and with a glycocalyx differing morphologically from that of the larger Amoebidae.
Moving cells generally 70 to 180 µm in length with one dominant pseudopodium and pseudopodia without ridges. Anterior hyaline caps frequently fill with advancing granuloplasm. Posterior morulate uroid. Cytoplasm with crystals, most as paired inclusions or as bipyramidal crystals. Nucleus spherical with nucleolar material in a few granular pieces or as a central endosome. At least one species forms cysts.
At the ultrastructural level the cell coat has filaments.

Type species: Deuteramoeba algonquinensis (Baldock, Rogerson & Berger, 1983)

Ecology: Freshwater and terrestrial.

Remarks: Two named species, one unusual (D. mycophaga) in that it feeds on fungi.

Recent posts

Amoeba proteus var.

Amoeba proteus var. Amoeba proteus var.  Diagnosis: This variety differs from the type by its oval nucleus. Dimensions: 250-400 µm (n=2); nucleus 34 x 29

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

Velamentofex tyrolensis (photomicrograph Steffen Clauß) Family Velamentofexidae Völcker and Clauß, 2020 Diagnosis: Multinucleate organic-walled monothalamous foraminifera. Test spherical to pyriform, usually surrounded by a broad

Read More »

Claparedellus lachmannii

Claparedellus lachmannii, common shape (Riedensee) Claparedellus lachmannii  Khanipour Roshan and Clauß, 2020 Diagnosis: Multinucleate organic-walled monothalamous foraminifera. Test spherical to elongated pyriform or irregularly shaped, with a

Read More »

Claparedellus

Claparedellus lachmannii Genus Claparedellus Khanipour Roshan and Clauß, 2020 Diagnosis: Multinucleate organic-walled monothalamous foraminifera. Test spherical to elongated pyriform or irregularly shaped, with a hyaline, flexible,

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 »