Gyraulus (Gyraulus) trochiformis rotundatus (Klein, 1846) † accepted as Gyraulus trochiformis (Stahl, 1824) † (additional source)
Planorbis multiformis var. aequeumbilicatus Hilgendorf, 1867 † (original description)
Planorbis multiformis var. crescens Hilgendorf, 1867 † accepted as Gyraulus crescens (Hilgendorf, 1867) † (original description)
Planorbis multiformis var. denudatus Hilgendorf, 1867 † accepted as Gyraulus denudatus (Hilgendorf, 1867) † (original description)
Planorbis multiformis var. discoideus Hilgendorf, 1867 † accepted as Gyraulus planorbiformis (Zieten, 1832) † (original description)
Planorbis multiformis var. elegans Hilgendorf, 1867 † accepted as Gyraulus trochiformis (Stahl, 1824) † (original description)
Planorbis multiformis var. minutus Hilgendorf, 1867 † accepted as Gyraulus subhemistoma (A. d'Orbigny, 1852) † (original description)
Planorbis multiformis var. parvus Hilgendorf, 1867 † accepted as Gyraulus steinheimensis (Hilgendorf, 1867) † (original description)
Planorbis multiformis var. pseudotenuis Hilgendorf, 1867 † accepted as Gyraulus pseudotenuis (Hilgendorf, 1867) † (original description)
Planorbis multiformis var. revertens Hilgendorf, 1867 † accepted as Gyraulus revertens (Hilgendorf, 1867) † (original description)
Planorbis multiformis var. steinheimensis Hilgendorf, 1867 † accepted as Gyraulus steinheimensis (Hilgendorf, 1867) † (original description)
Planorbis multiformis var. sulcatus Hilgendorf, 1867 † accepted as Gyraulus planorbiformis (Zieten, 1832) † (original description)
Planorbis multiformis var. supremus Hilgendorf, 1867 † accepted as Gyraulus supremus (Hilgendorf, 1867) † (original description)
Planorbis multiformis var. tenuis Hilgendorf, 1867 † accepted as Gyraulus steinheimensis (Hilgendorf, 1867) † (original description)
Planorbis multiformis var. triquetrus Hilgendorf, 1867 † accepted as Gyraulus triquetrus (Hilgendorf, 1867) † (original description)

 Validity

 for Gyraulus platystomus Nützel & Bandel, 1993 †

Nützel & Bandel (1993) referred the authority to Hilgendorf (1867), who described the taxon at infrasubspecific ... [details]