Rhizaspis transformis  Dumack, Öztoprak, Rüger and Bonkowski, 2017

Diagnosis: Similar to Rhizaspis rugosa, with following differences: Highly metabolic and therefore varying in shape and size, usually bulky and deformed; never resembled the thin and disc-like shape of Rhizaspis rugosa; no clear separation in zones; cysts present, vary in form: theca builds an envelope around the spherical cyst, compressed with notches and protuberances; filopodia with numerous non-contractile vacuoles.

Type locality. Pond in urban park, in Cologne near Mülheim, Germany (50.958675, 7.005476).