Pinaciophora
Rabdiophrys
Pompholyxophrys
Pompholyxophrys

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
Recent posts

Ditrema spec.

Ditrema spec. Ditrema spec. Diagnosis: Shell as with D. longicollis, but much smaller, surrounded by V-shaped structures that gave it the impression of a star.

Read More »

Rotosphaerida

Pompholyxophrys Pompholyxophrys Pompholyxophrys Rabdiophrys Rotosphaerida Rainer, 1968 Diagnosis: Aciliate predominantly spherical or flattened amoebae from which elongated actin-based filopodia extend; with flat discoid mitochondrial cristae;

Read More »

Centropyxis tabel

Key to Centropyxis species 1 Test in dorsal view circular or almost circular 2 – Test in dorsal view irregular due to various outgrows and

Read More »