world of amoeboid organisms

Menu
Padaungiella nebeloides
Padaungiella nebeloides, in Todorov and Meisterfeld, 2011

 

Padaungiella nebeloides (Gautier-Lièvre et Thomas, 1958) Lara et Todorov, 2011

Difflugia nebeloides Gauthier-Lièvre et Thomas, 1958

Diagnosis: The shell is yellowish or light brown, pyriform, slim and elongate, rounded aborally and tapering evenly from just anterior of the one third body region towards the aperture, forming a distinct neck. It is circular in transverse section, and is composed of a mixture of predated or collected oval, circular (from Euglyphida) and quadrangular shell plates (from Quadrulella symmetrica). These ‘kleptoidiosoms’ are usually arranged haphazardly and overlap. Occasionally, small to medium flattish pieces of quartz are included between siliceous shell plates, but they are so arranged to give a smooth appearance of the shell. Organic cement is seen frequently between shell components, and small single pores with a diameter of about 200-250 nm are often seen in the cement. The aperture is roughly circular or with irregular outline, and is surrounded by a thick collar of organic cement, which is characterized by its uneven and undulating rim. In cysts the test is sealed by a detrital plug at the junction of the fundus and the neck. The cell self is encased in a transparent organic cyst wall.

Dimensions: Gauthier-Lièvre et Thomas (1958): Length 118-140 µm, width 35-45 µm, pseudostome 17-20 µm; Todorov and Meisterfeld (2011): Length 113-140 µm, width 43-54 µm, pseudostome 17-21 µm.

Ecology: Wet Sphagnum mosses. Congo, Bulgaria, Austria, Germany.

Padaungiella nebeloides
Padaungiella nebeloides, from Gauthier-Lièvre et Thomas, 1958

 
 
 

Recent posts

Polychaos spec.

Polychaos spec. Polychaos spec. Diagnosis: Large amoeba with an irregular more or less polypodial shape during slow locomotion; uroid finely papillated, usually very large fasciculate

Read More »

Spiculophrys

Genus Spiculophrys Zlatogursky, 2016 Diagnosis: Centrohelids lacking silica scales but with numerous thin, pointed organic (without any traces of silica) scales tapering towards acute apices. 18S

Read More »

Acanthocystis drakena

From Zlatogursky, 2016 Acanthocystis drakena Zlatogursky, 2016 Diagnosis: Cells are 21.1-30.5 µm (ca. 26.7) in diameter. Cell is covered with oval plate-scales having a margin

Read More »

Choanocystis symna

From Zlatogursky, 2014 Choanocystis symna Zlatogursky, 2014 Diagnosis: Cell body ca. 6.7 µm in diameter. Axopodia three–five times longer than a cell diameter. Plate-scales dumbbell-shaped

Read More »

Acanthocystis costata

From Zlatogursky, 2014 Acanthocystis costata Zlatogursky, 2014 Diagnosis: Cell body ca 9.5 µm in diameter. Axopodia 2–3 times longer than cell diameter. Length of spine-scales

Read More »

Kinetocyst

Left: ultra-structure of a kinetocyst of Raphidiophrys contractilis); right: two kinetocysts in an axopodium. Kinetocysts In centrohelid heliozoa, extrusomes are called kinetocysts, and are present

Read More »