world of amoeboid organisms

Subclass Placoperla Cavalier-Smith, 2012 Diagnosis: imbricate cercozoa that secrete a test of mineralized spherical perles or silicified plate scales that are typically double tiered with a perforate upper tier. Includes superorders Perlatia and Placofila. Order Perlofilida Cavalier-Smith, 2012 Diagnosis: near spherical heterotrophic and phagotrophic non-flagellate protists with uniformly extremely thin but stiff, symmetrically radiating, unbranched filopodia (unlike Cristidiscoidea), lacking a microtubule axoneme and lacking extrusomes; unlike in Cristidiscoidea, cell surface covered with one or more layers of spherical siliceous perles bounded by a wall with numerous uniformly sized but irregular-shaped small holes. Centrosomes and interphase microtubules absent, unlike Heliozoa; mitochondrial cristae flat; numerous Golgi dictyosomes closely surround the eccentric nucleus; thin ectoplasm without a dense layer underlying the plasma membrane, unlike Apusozoa; microbodies associated with lipid drops and mitochondria.
Pinaciophora fluviatilis, pores visible – fountain of the Royal Palace het Loo, the Netherlands
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Penardochlamys arcelloides

P. arcelloides – from Penard, 1904 Penardochlamys arcelloides  (Penard, 1904) Deflandre, 1953 Diagnosis: Colorless or very slightly yellowish envelope, bag or cauldron-shaped, very thin, chitinous,

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Reticulomyxa hannae

R. hannae, plasmodium – photomicrograph Steffen Clauss Reticulomyxa hannae Völcker and Clauß, 2020 Diagnosis: Trophozoites surrounded by a very thin mucous envelope, with slowly moving plasmodia, variable

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Velamentofex saxonensis

V. saxonensis, feeding (photomicrograph Steffen Clauss) Velamentofex saxonensis Völcker and Clauß, 2020 Diagnosis: Trophozoites ovoid, 30-95 μm, granuloreticulopodia up to 1000 μm long. with a hyaline, thin

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Velamentofex tyrolensis

V. tyrolensis (photomicrograph Steffen Clauss) Velamentofex tyrolensis Völcker and Clauß, 2020 Diagnosis: Trophozoites ovoid, 98-125 μm, with reticulopodia up to 300 μm long, with a hyaline,

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Velamentofex berolinensis

V. berolinensis Velamentofex berolinensis Völcker and Clauß, 2020 Diagnosis: Trophozoites ovoid, 50-300 µm, with a hyaline, extremely flexible, membranous test. Nuclei numerous, 11.6-16.2 µm in diameter,

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 Lieberkuehniidae  Siemensma, Holzmann, Apothéloz-Perret-Gentil, Clauß, Voelcker, Bettighofer, Khanipour Roshan, Walden, Dumack and Pawlowski, 2020 Diagnosis: Multinucleate organic-walled monothalamous foraminifera. Test very flexible, elongated to broadly

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