world of amoeboid organisms

Menu
Microcometes paludosa

Genus Microcometes Cienkowsky, 1876

Diagnosis: Shell hyaline, usually dark brown, small, with one side fastened to the substrate; outline polygonal, irregular; shell with three to five apertures, with or without short necks. Pseudopodia very thin, granular, branching. Usually with two short cilia. Nucleus globular with a central nucleolus. Three to six contractile vacuoles.

Type species: Microcometes paludosa Cienkowski, 1876

Dimensions: De Saedeleer (1934): shell 6.8-17 µm. My measurements: 9.0-11.2 µm.

Ecology: freshwater; bacterivorous.

Remarks: The two cilia are easily overlooked and even the filopodia are hard to detect. Because of these cilia, this genus has been moved to the heterotrophic ciliates.

De Saedeleer (1934) describes two species, Microcometes paludosa and M. aculeata, with short spines. The latter has originally been described by Lauterborn (1908) as M. paludosa var. aculeata.

Microcometes paludosa is not rare, but usually not easy to discover in fresh preparations. Best is to keep preparations in moist chambers and to scan them regularly. Specimens mostly attach to the cover glass and are easily visible because of the dark brown color.

Click here for the original description of Cienkowski.

Microcometes paludosa - Ferry Siemensma
Microcometes paludosa
Microcometes paludosa - Ferry Siemensma
Microcometes paludosa with three apertures
bar = 10 µm
Microcometes paludosa
Microcometes paludosa – Photomicrograph: Yana Egli
Recent posts

Chlamydophrys-schaudinn

Fritz Schaudinn (1871 – 1906) was a German zoologist. He was the co-discoverer of the causative agent of syphilis and did research on amoebas, particularly

Read More »

Alabasta longicollis

Alabasta longicollis, after Penard, 1890 Alabasta longicollis  (Penard, 1890) Diagnosis: Test pyriform, very elongated (3 times as long as wide), transparent, very little compressed, embedded

Read More »

Alabasta kivuense

Alabasta kivuense, after Gauthier-Lièvre and Thomas, 1961 Alabasta kivuense  Gauthier-Lièvre and Thomas, 1961 Diagnosis: In frontal view, the test is finger-shaped with subparallel sides, the

Read More »

Paulinella micropora

Paulinella micropora, – from Lhee et al., 2017 Paulinella micropora Lhee, Yang, Kim, Andersen & Yoon, 2017 Diagnosis: Test elongate, with five columns of scales,

Read More »

Quadrulella tubulata

Quadrulella tubulata, after Gauthier-Lièvre, 1953 Quadrulella tubulata  Gauthier-Lièvre, 1953 Diagnosis: Shell almost lageniform, compressed, with rounded fundus and more or less irregularly arranged, commonly small,

Read More »

Quadrulella elongata

Quadrulella elongata, after Van Oye, 1952 Quadrulella elongata  Van Oye, 1952 Diagnosis: Test elongated with long neck and square plates, without any pores. Pseudosome slightly

Read More »