world of amoeboid organisms

Menu
Dermamoeba
Dermamoeba algensis – courtesy A. Smirnov

Genus Dermamoeba Page & Blakey, 1979

Diagnosis: Locomotive form oval or elongate, up to 85 µm in length, with frequent narrowing of the anterior end. Extensive hyaline zone, often extending posteriorly along the margins. Surface of cell smooth, but, when present, morulate uroid gives rise to surface folds at the posterior. Nucleus frequently with a pair of central bodies. Cytoplasm can have yellow/brown inclusions; feeds on fungi and other microbes in the soil. Cysts in at least one of the 2 described species.
Type species: Dermamoeba granifera (Greeff, 1966)

Three known species:
D. granifera
D. minor
D. algensis

Dermamoeba algensis  Smirnov, Bedjagina and Goodkov, 2011

Diagnosis: Amoeba of lingulate morphotype; length in locomotion 50–100 µm (average 75 µm); breadth 30–50 µm (average 37 µm); length/breadth ratio 1.4–2.8 (average 2.0). Single vesicular nucleus 2.9–5.7 µm in diameter (average 4.7 µm) with the single central nucleolus 1.4–4.6 µm in diameter (average 3.2 µm). The nucleolus contains a number of lacunae. Cell coat ca. 500 nm in thickness. Cysts rounded, single-walled, 47–70 µm diameter (average 58 µm); cyst wall is smooth, no cyst pores.

Ecology: small freshwater pond close to Kirovsk village
(North-Western Russia).

Recent posts

Sphenoderia compressa

Sphenoderia compressa, after Badewitz, 2002 Sphenoderia compressa Badewitz, 2002 Diagnosis: Test ovoid, oval in cross section, hyaline, covered with relatively small, oval, rather irregularly arranged

Read More »

Tracheleuglypha elongata

T. elongata, A-C after Thomas and Gauthier-Lièvre, 1959; D after Van Oye, 1959 Tracheleuglypha elongata Van Oye, 1959 Diagnosis: Test similar to T. dentata, but

Read More »

Tracheleuglypha acolla

T. acolla, after Bonnet and Thomas, 1960 Tracheleuglypha acolla Bonnet and Thomas, 1955 Diagnosis: Test ovoid, non compressed, round in cross-section, with large oval overlapping

Read More »

Cyclopyxis kahli oblonga

C. kahli f. oblonga , after Tarnogradskii, 1959 Cyclopyxis kahli f. oblonga  (Tarnogradskii, 1959) Centropyxis kahli f. oblonga Tarnogradskii, 1959 Diagnosis:  Test with all the

Read More »

Cyclopyxis leclercqi

Cyclopyxis leclercqi – from Beyens and Chardez, 1986 Cyclopyxis leclercqi Beyens and Chardez, 1986 Diagnosis: Shell circular in apertural view, dorso-ventrally compressed with a swollen

Read More »

Haplomyxa saranae

Haplomyxa saranae Dellinger, 2014 Diagnosis: cell body from small rounded (0.1 mm) to large elongated shape (up to 3.5 x 0.3 mm), usually flat but

Read More »