Didacna baeri var. transmittens Pravoslavlev, 1939 † accepted as Didacna subpyramidata Pravoslavlev, 1939 † (original description)
Didacna bogatschevi Pravoslavlev, 1939 † accepted as Didacna subcrassa subcrassa Pravoslavlev, 1939 † (original description)
Didacna bogatschevi var. opima Pravoslavlev, 1939 † (original description)
Didacna carditoides var. kalickii Pravoslavlev, 1939 † (original description)
Didacna carditoides var. uralica Pravoslavlev, 1939 † accepted as Didacna grimmi Pravoslavlev, 1939 † (original description)
Didacna catilloides Pravoslavlev, 1939 † accepted as Didacna grimmi Pravoslavlev, 1939 † (original description)
Didacna catilloides var. obtusa Pravoslavlev, 1939 † accepted as Didacna grimmi Pravoslavlev, 1939 † (original description)
Didacna catillus var. catillata Pravoslavlev, 1939 † (original description)
Didacna catillus var. dilatata Pravoslavlev, 1939 † accepted as Didacna dilatata Pravoslavlev, 1939 † (original description)
Didacna crassa var. alta Pravoslavlev, 1939 † accepted as Didacna nalivkini Vassoevich, 1930 † (original description)
Didacna elongatoovata Pravoslavlev, 1939 † accepted as Didacna obliquetrigona Pravoslavlev, 1939 † (original description)
Didacna elongatoovata var. bogatschevi Pravoslavlev, 1939 † accepted as Didacna grimmi Pravoslavlev, 1939 † (original description)
Didacna frequens Pravoslavlev, 1939 † accepted as Didacna subrudis Pravoslavlev, 1939 † accepted as Didacna grimmi Pravoslavlev, 1939 † (original description)
Didacna gibba Pravoslavlev, 1939 † accepted as Didacna subrudis Pravoslavlev, 1939 † accepted as Didacna grimmi Pravoslavlev, 1939 † (original description)
Didacna grimmi Pravoslavlev, 1939 † (original description)
Didacna grimmi var. cuneata Pravoslavlev, 1939 † accepted as Didacna grimmi Pravoslavlev, 1939 † (original description)
Didacna grimmi var. subquadrata Pravoslavlev, 1939 † accepted as Didacna grimmi Pravoslavlev, 1939 † (original description)
Didacna hebes Pravoslavlev, 1939 † accepted as Didacna subcrassa subcrassa Pravoslavlev, 1939 † (original description)
Didacna hebes var. romboidea Pravoslavlev, 1939 † (original description)
Didacna hians Pravoslavlev, 1939 † accepted as Didacna obliquetrigona Pravoslavlev, 1939 † (original description)
Didacna incrassa Pravoslavlev, 1939 † accepted as Didacna subcrassa subcrassa Pravoslavlev, 1939 † (original description)
Didacna incrassata var. sublimis Pravoslavlev, 1939 † (original description)
Didacna lintriculus Pravoslavlev, 1939 † accepted as Didacna subrudis Pravoslavlev, 1939 † accepted as Didacna grimmi Pravoslavlev, 1939 † (original description)
Didacna naviculata Pravoslavlev, 1939 † accepted as Didacna grimmi Pravoslavlev, 1939 † (original description)
Didacna obliquetrigona Pravoslavlev, 1939 † (original description)
Didacna obliquetrigona var. triquerta Pravoslavlev, 1939 † (original description)
Didacna ostroumovi Pravoslavlev, 1939 † accepted as Didacna subrudis Pravoslavlev, 1939 † accepted as Didacna grimmi Pravoslavlev, 1939 † (original description)
Didacna ovatocrassa Pravoslavlev, 1939 † (original description)
Didacna ovatula Pravoslavlev, 1939 † accepted as Didacna obliquetrigona Pravoslavlev, 1939 † (original description)
Didacna pallasi Pravoslavlev, 1939 † accepted as Didacna subpyramidata Pravoslavlev, 1939 † (original description)
Didacna paracrassa Pravoslavlev, 1939 † accepted as Didacna subcrassa subcrassa Pravoslavlev, 1939 † (original description)
Didacna praeprotracta Pravoslavlev, 1939 † accepted as Didacna obliquetrigona Pravoslavlev, 1939 † (original description)
Didacna praeprotracta var. dubia Pravoslavlev, 1939 † (original description)
Didacna praetrigonoides var. incerta Pravoslavlev, 1939 † accepted as Didacna grimmi Pravoslavlev, 1939 † (original description)
Didacna praetrigonoides var. obliqua Pravoslavlev, 1939 † (original description)
Didacna praetrigonoides var. paucicostata Pravoslavlev, 1939 † accepted as Didacna grimmi Pravoslavlev, 1939 † (original description)
Didacna prona Pravoslavlev, 1939 † accepted as Didacna grimmi Pravoslavlev, 1939 † (original description)
Didacna roseni Pravoslavlev, 1939 † accepted as Didacna subrudis Pravoslavlev, 1939 † accepted as Didacna grimmi Pravoslavlev, 1939 † (original description)
Didacna roseni var. gibbosa Pravoslavlev, 1939 † accepted as Didacna grimmi Pravoslavlev, 1939 † (original description)
Didacna rudis var. amygdaloides Pravoslavlev, 1939 † (original description)
Didacna rudis var. elongata Pravoslavlev, 1939 † accepted as Didacna grimmi Pravoslavlev, 1939 † (original description)
Didacna rudis var. oblonga Pravoslavlev, 1939 † accepted as Didacna grimmi Pravoslavlev, 1939 † (original description)
Didacna subartemiana Pravoslavlev, 1939 † (original description)
Didacna subartemiana var. aversa Pravoslavlev, 1939 † (original description)
Didacna subcarditoides Pravoslavlev, 1939 † accepted as Didacna subrudis Pravoslavlev, 1939 † accepted as Didacna grimmi Pravoslavlev, 1939 † (original description)
Didacna subcrassa Pravoslavlev, 1939 † (original description)
Didacna subcrassa var. tumulosa Pravoslavlev, 1939 † (original description)
Didacna subimbricata Pravoslavlev, 1939 † (original description)
Didacna sublongipes Pravoslavlev, 1939 † (original description)
Didacna subovalis Pravoslavlev, 1939 † accepted as Didacna vulgaris Andrusov, 1910 † (original description)
Didacna subovalis var. decens Pravoslavlev, 1939 † (original description)
Didacna subovalis var. inflata Pravoslavlev, 1939 † (original description)
Didacna subovalis var. subcompressa Pravoslavlev, 1939 † (original description)
Didacna subpallasi Pravoslavlev, 1939 † accepted as Didacna subcrassa subcrassa Pravoslavlev, 1939 † (original description)
Didacna subpallasi var. parvuloides Pravoslavlev, 1939 † (original description)
Didacna subpyramidata Pravoslavlev, 1939 † (original description)
Didacna subrudis Pravoslavlev, 1939 † accepted as Didacna grimmi Pravoslavlev, 1939 † (original description)
Didacna surachanica var. monodacnoides Pravoslavlev, 1939 † (original description)
Didacna vicina Pravoslavlev, 1939 † accepted as Didacna subimbricata Pravoslavlev, 1939 † (original description)