Microworld

world of amoeboid organisms

Menu
Capsellina bryorum

Conosphaera plexiformis*
Temporary name till it is published. This could also be a Luffisphaera species

This small cercozoan came up in wet mounts kept in moist chambers for some days. I’ve found it at several locations in oligotrophic and mesotrophic fresh waters, like Crailoo and ‘t Loo, both in the Netherlands, and in a small stream in Bretagne, France. It  This cercozoan has filopodia, like Pseudodifflugia, and a bowl shaped test with a large aperture. The test is composed of particles which look like birds heads: a sphere with a pointed spine (see arrowheads), which in SEM show a triangular sheet with a network shaped structure (see below).

Some spines – SEM-photomicrograph Eckhard Voelcker
Spine – SEM-photomicrograph Eckhard Voelcker
Detail of a spine – SEM-photomicrograph Eckhard Voelcker
Capsellina bryorum
Capsellina bryorum
Arrowheads point to spines.
Specimen from Crailoo, the Netherlands and (r) from Bretagne, France
Small stream, Bretagne, France
Dorsal view, small stream, Bretagne, France; arrow points to spined element
Arrow points to a sphere (‘t Loo, the Netherlands)and a sharp point
Filopodia doesn’t seem to come from a kind of pseudostome. Nucleus visible (‘t Loo, the Netherlands)
Specimen from France
Recent posts

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

Zivkovicia 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 »

Bullinularia macroporum

Bullinularia macroporum – from Bobrov and Mazei, 2020 Bullinularia macroporum Bobrov et Mazei, 2020 Diagnosis: Shell yellow-brownish, transparent, circular in ventral view; ventral surface is

Read More »

Nebela golemanskyi

N. golemanskyi, after Todorov, 2010 Nebela golemanskyi Todorov, 2010 Diagnosis: Shell large, colourless and pyriform, with a distinct short neck about one fourth of the

Read More »

Nebela nebeloides

N. nebeloides, after Gauthier-Lièvre and Thomas, 1958 Nebela nebeloides (Gauthier-Lièvre and Thomas, 1958) Todorov et al., 2010 Basionym: Difflugia nebeloides Gauthier-Lièvre and Thomas, 1958 Diagnosis:

Read More »