Microworld

world of amoeboid organisms

Menu
Nadinella tenella, 50 µm

Genus Nadinella Penard, 1900

Diagnosis: shell ovoid or pyriform, in cross section circular, narrowing towards the pseudostome into a distinct neck; aperture broad elliptical, surrounded by a thin hyaline outward bend collar; shell composed of an organic material, embedded with mineral grains of different size, usually not covering the surface completely, with larger grains embedded in the fundus part en smaller grains towards the aperture; the collar is free of grains. Nucleus globular. Filopodia very long and thin, usually one to three. Plasma doesn’t fill the shell completely. One known species.

Ecology: freshwater, clear stagnant and running waters

Nadinella tenella
Nadinella tenella
Shell with distinct neck, 50 µm and shell with less distinct neck, 60 µm
Recent posts

Pelomyxa video

Pelomyxa palustris Pelomyxa palustris, found below decaying leaves in the hollow of a beech Pelomyxa palustris, found below decaying leaves in the hollow of a

Read More »

Hoogenraadia galeata

H. galeata – from Stepanek, 1963 Hoogenraadia galeata  (Stepanek, 1963) n. comb. Gillardella galeata Stepanek, 1963 Diagnosis: Shell somewhat similar to the shell of Corythion dubium

Read More »

Arcella grospietschi

Arcella grospietschi, after Stepanek, 1963 Arcella grospietschi  Stepanek, 1963 Diagnosis: Shell disc-shaped, yellow-brown, in ventral view with a undulated border, with seven large and seven smaller

Read More »

Arcella oyei

Arcella oyei, after Stepanek, 1963 Arcella oyei  Stepanek, 1963 Diagnosis: In dorsal view, the shell is circular, with 10 apparent broken lobes on the surface. In

Read More »

Centropyxis halophila

C. halophila, after Bonnet, 1959 Centropyxis halophila Bonnet, 1959 Diagnosis: Shell with ovoid sole, extended by a rather strongly covering visor and not clearly separated

Read More »

Euglypha cuspidata

Euglypha cuspidata Euglypha cuspidata  Bonnet, 1959 Diagnosis: Shell small, very transparent, ovoid, in lateral view very elliptical, with sharp edges. Pseudostome small, elliptical, surrounded by a

Read More »