Rotosphaerida

[taxonomy:genus=Nuclearia] Nuclearia is a naked filose amoeba. The filose pseudopodia are involved in feeding and locomotion, and are constantly growing and retracting. This video illustrates the wavy or bent appearance that the filopodia take when they are retracting. Date: 16 Aug 2011 Location: Freshwater fish pond in concrete tank, outside Life Science Lab 7. Walls were covered in filamentous cyanobacteria, and the bottom with fish waste. Water was mostly clear. Microscope: Bright-field with closed condenser aperture. Camera: Nikon D7000

Description: Nuclearia thermophila / from Lake Yuno-ko, Nikko, Tochigi Pref., Japan / Microscope:Leica DMRD (DIC). Date: 22 February 2007. Source: Own work. Author: ja:User:NEON / User:NEON_ja. Permission(Reusing this file): : This file is licensed under the Creative Commons Attribution-Share Alike 2.5 Generic license. :. You are free: to share – to copy, distribute and transmit the work to remix – to adapt the work Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original. https://creativecommons.org/licenses/by-sa/2.5 CC BY-SA 2.5 Creative Commons Attribution-Share Alike 2.5 truetrue. Other versions: This file has an extracted image: File:Nuclearia sp Nikko (cropped).jpg..

Description: Nuclearia thermophila / from Lake Yuno-ko, Nikko, Tochigi Pref., Japan / Microscope:Leica DMRD (DIC). Date: 22 February 2007. Source: Own work. Author: ja:User:NEON / User:NEON_ja. Permission(Reusing this file): : This file is licensed under the Creative Commons Attribution-Share Alike 2.5 Generic license. :. You are free: to share – to copy, distribute and transmit the work to remix – to adapt the work Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original. https://creativecommons.org/licenses/by-sa/2.5 CC BY-SA 2.5 Creative Commons Attribution-Share Alike 2.5 truetrue. Other versions: : This file has been extracted from another file: Nuclearia sp Nikko.jpg : .

Nuclearia (new-clee-air-ee-a), a nucleariid (cristi-discoid) filose amoeba. Exclusively with thin pseudopodia without skeletal supports. More of these project from the front of the cell (to the right), whereas they appear a little more crumpled at the posterior end. Eats bacteria, algae, detritus. Phase contrast.

Nuclearia (new-clee-air-ee-a), a nucleariid (cristi-discoid) filose amoeba. Exclusively with thin pseudopodia without skeletal supports. More of these project from the front of the cell (to the right), whereas they appear a little more crumpled at the posterior end. Eats bacteria, algae, detritus. Phase contrast.

Nuclearia (nuke-lee-air-ee-a) is a naked filose amoeba. It is referred to as naked because there is no lorica and wall, and filose because of the thread-like appearance of the pseudopodia. Normally consume algae and detritus. Phase contrast. Material from Nymph Creek and Nymph Lake, thermal sites within Yellowstone National Park, photograph by Kathy Sheehan and David Patterson.

Nuclearia , nucleariid filose amoebae with thin pseduopodia. This is one of the smaller species, either N. moebiusi or N. simplex. There is a large nucleus with a dark spherical nucleolus and to the right is a contractile vacuole. The fine pseudopodia extend from the front of the cell (upper left) and are withdrawn from the back of the cell. From Lake Donghu, China. Phase contrast micrograph.

Nuclearia , nucleariid filose amoebae with thin pseduopodia. This is one of the smaller species, either N. moebiusi or N. simplex. It has invaded a colony of Microcystis (cyanobacteria) and is eating the bacterial cells and multiplying within the colony. From Lake Donghu, China Phase contrast micrograph.

Nuclearia, one of the naked filose amoebae, producing thin pseudopodia without internal skeletons. This is one of the larger more rounded species, eats detritus and algae. Phase contrast micrograph.

Nuclearia isolated from sandy sediments from Little Sippiwissett salt marsh. Micrograph taken by Jeffrey Cole.

Nuclearia (new-clee-air-ee-a), a nucleariid (cristi-discoid) filose amoeba. Exclusively with thin pseudopodia without skeletal supports. More of these project from the front of the cell (to the left), whereas they appear a little more crumpled at the posterior end. The structure slightly right and below the centre is the nucleus, with a large nucleolus and the nucleolus having a small empty central region. Eats bacteria, algae, detritus. Differential interference contrast.

This cell, like many Nuclearia species, has been consuming algae. The nucleus is the clear area with the dark nucleolus in the center. Nucleariid amoebae have thin non-stiff pseudopodia. Phase contrast image.

Cysts, from a culture. Phase contrast.

Live cell, phase contrast. The fine pseudopodia are typical of nuclearid filose amoebae. The surrounding material is mostly comprised of yeast cell walls (the species is provided with yeast as food).

Pompholyxophrys is a filose amoeba. Its cell surface is covered by a layer of delicate siliceous (glass-like) spheres. It has thin, delicate pseudopodia that it uses for movement. The structure to the right in the cell is its nucleus.

Portrait of Pompholyxophrys, one of the heliozoon-like amoebae previously assigned to the order Rotosphaerida. Pompholyxophrys has a periplast composed of endogenously formed siliceous elements of a single type within a species. These are spherical in the type species P. punicea but may be ovoid (see images of P. ovuligera), discoid or bone-shaped. Radiating spicules are absent. What appear at first glance to be axopodia are, in fact, filopods that lack axonemes and extrusomes. Contracted filopodia may appear granular leading to confusion but close examination of the extended filopodia shows extrusomes are absent. From standing freshwater Typha latifolia marsh near Boise, Idaho. Differential interference contrast

Pompholyxophrys (pom-folly-zoff-riss) punicea. The cytoplasm of the spherical body is colorless or reddish, often interspersed with colored granules and green or brown food particles. The outer periplast is built up from conspicuous minute colourless spherical granules (perles) arranged in concentric layers. The granules are glass like hollow spheres and arranged in concentric layers to form a compact envelope. The large nucleus is located eccentricly. The straight and pointed pseudopodia are tenuous and indistinct. Individuals are found occasionally in ponds and swamps. This specimen was collected in a bog pond near Konstanz, Germany. The outer sphere of colourless spherical perles can be seen to be lying in concentric layers. Differential interference contrast.

Pompholyxophrys (pom-folly-zoff-riss) punicea. The cytoplasm of the spherical body is colorless or reddish, often interspersed with colored granules and green or brown food particles. The outer periplast is built up from conspicuous minute colourless spherical granules (perles) arranged in concentric layers. The granules are glass like hollow spheres and arranged in concentric layers to form a compact envelope. The large nucleus is located eccentricly. The straight and pointed pseudopodia are tenuous and indistinct. Individuals are found occasionally in ponds and swamps. This specimen was collected in a bog pond near Konstanz, Germany. The focal plane on the surface of the sphere of spherical granules. Each perle measures 3-4 microns in diameter. Differential interference contrast.