Microworld

world of amoeboid organisms

Menu

Genus Micropyxidiella  Tarnawski and Lara, 2015

Diagnosis: Genus of testate amoebae with filamentous pseudopodia, entirely organic test (without self-secreted scales or mineral particles). Large round nucleus (about 20% of shell length).
Type species: Micropyxidiella edaphonis (Monotypic)

Micropyxidiella
P. edaphonis, TEM, from Tarnawski and Lara, 2015

Micropyxidiella edaphonis   Tarnawski and Lara, 2015

Diagnosis: Very small testate amoebae (length: 8-10 µm; width: 5-6 µm), with an ovoid transparent test, comparable to the related species Ovulina parva. These organisms were most often associated to organic particles, presumably feeding on bacteria. Shell with a pointed end, reminding of certain members of genus Difflugia such as D. acuminata, clearly visible under scanning electron microscopy, but not under light microscopy. Nucleus of about 2 µm.

Ecology: Soil. Type locality: Organisms were collected from a forest litter sample taken near Les Ponts de Martel, 47◦00’N 6◦44’E, Switzerland.

Micropyxidiella
Micropyxidiella

I found this very small shell in mosses on a tree near Saarburg, Germany, 2015. Though the shell is very small and hard to resolve in LM, it might be a Micropyxidiella shell.

Recent posts

Foraminifer drome

Unknown species, collected from the river Drôme, France, 2021 Unknown species September 2021, I found three specimens of an agglutinated foraminifer in a sample collected

Read More »

Cyclopyxis spec

Cyclopyxis spec., 168 µm Cyclopyxis spec. Diagnosis: Shell circular in ventral and dorsal view, more or less hemispherical in lateral view (height/diameter ≈ 0.5); lateral

Read More »

Difflugia fallax

Difflugia fallax, from Penard, 1902 Difflugia fallax Penard, 1890 Diagnosis: Shell hyaline or yellowish-greenish, black at low magnification, round in cross section, formed of a

Read More »

Zivkovicia compressoidea

Z. compressoidea, a-b after Chardez, 1958; c after Jung, 1942 Zivkovicia compressoidea  (Jung, 1942) new.comb. Basionym: Pontigulasia compressoidea Jung, 1942 Diagnosis: Shell ovoid and compressed,

Read More »

Zivkovicia flexa

Z. flexa, from Cash and Hopkinson, 1909 Zivkovicia flexa  (Cash and Hopkinson, 1909) Ogden, 1983 Basionym: Pontigulasia compressa var. flexa  Cash and Hopkinson, 1909 Diagnosis:

Read More »

Lagenodifflugia epiouxi

L. epiouxi, after Chardez, 1984 3 Lagenodifflugia epiouxi (Chardez, 1983) new comb. Basionym: Pontigulasia epiouxi Chardez, 1983 Diagnosis: Shell elongate, circular in cross-section or very

Read More »

Centropyxis lapponica

Centropyxis lapponica, after Grospietsch, 1954 Centropyxis lapponica  Grospietsch, 1954 Diagnosis: Shell nearly circular in circumference, without spines. Aperture clear square with rounded corners. Shell viewed

Read More »

Chaos spec. 6

Chaos spec., Crailoo, 2021 Chaos spec. This specimen was found in a samples from Crailoo, Netherlands. It was remarkable because of the absence of crystals.

Read More »

Bullinularia maxima

Bullinularia maxima – from Bobrov and Mazei, 2020 Bullinularia maxima Bobrov et Mazei, 2020 Diagnosis: Shell brown, opaque, elliptical in ventral view; ventral surface is

Read More »