Actinophrys is a genus of heliozoa, amoeboid unicellular organisms with many axopodial filaments that radiate out of their cell.

[3] Actinophrys species belong to an informal group known as heliozoa, which are unicellular eukaryotes (or protists) that are heterotrophic (also known as protozoa) and present stiff radiating arms known as axopodia.

[3][4] In particular, Actinophrys species are characterized by axonemes consisting of double interlocking spirals of microtubules.

The species originally belonged to a genus named Trichoda, described earlier by Otto Friedrich Müller and later declared obsolete.

[1] In 1824, Bory de St. Vincent transferred that species to a new genus Peritricha but, without any new observations to justify the change, it fell out of use.