Didacna becenensis Andrusov, 1910 † (original description)
Didacna carditoides Andrusov, 1910 † (original description)
Didacna catillus var. subcatillus Andrusov, 1910 † accepted as Didacna subcatillus Andrusov, 1910 † (original description)
Didacna catillus var. surachanica Andrusov, 1910 † accepted as Didacna surachanica Andrusov, 1910 † (original description)
Didacna catillus var. vulgaris Andrusov, 1910 † accepted as Didacna vulgaris Andrusov, 1910 † (original description)
Didacna crassatellata var. trigona Andrusov, 1910 † accepted as Pontalmyra crassatellata trigona (Andrusov, 1910) † (original description)
Didacna incerta (Deshayes, 1838) † accepted as Pontalmyra incerta (Deshayes, 1838) † (basis of record)
Didacna incerta var. fragilis Andrusov, 1910 † accepted as Pontalmyra incerta fragilis (Andrusov, 1910) † (original description)
Didacna karpinskyi Andrusov, 1910 † accepted as Pontalmyra karpinskyi (Andrusov, 1910) † (original description)
Didacna planicostata var. kiptschakensis Andrusov, 1910 † accepted as Pontalmyra kiptschakensis (Andrusov, 1910) † (original description)
Didacna planicostata var. latecarinata Andrusov, 1910 † accepted as Pontalmyra planicostata (Deshayes, 1838) † (original description)
Didacna planicostata var. pluricostata Andrusov, 1910 † accepted as Pontalmyra planicostata (Deshayes, 1838) † (original description)
Didacna planicostata var. tenuicostata Andrusov, 1910 † accepted as Pontalmyra planicostata (Deshayes, 1838) † (original description)
Didacna protracta var. grimmi Andrusov, 1910 accepted as Didacna protracta (Eichwald, 1841) (original description)
Didacna protracta var. media Andrusov, 1910 accepted as Didacna protracta (Eichwald, 1841) (original description)
Didacna protracta var. submedia Andrusov, 1910 accepted as Didacna protracta (Eichwald, 1841) (original description)
Didacna subcrassatellata Andrusov, 1910 † accepted as Pontalmyra subcrassatellata (Andrusov, 1910) † (original description)
Didacna subcrenulata Andrusov, 1910 † accepted as Pontalmyra subcrenulata (Andrusov, 1910) † (original description)
Didacna subdepressa Andrusov, 1910 † accepted as Pontalmyra subdepressa (Andrusov, 1910) † (original description)
Didacna subincerta Andrusov, 1910 † accepted as Pontalmyra subincerta (Andrusov, 1910) † (original description)
Didacna subpaucicostata (R. Hoernes, 1874) † accepted as Pontalmyra planicostata (Deshayes, 1838) † (basis of record)
Didacna subsulcatina Andrusov, 1910 † accepted as Pontalmyra sulcatina subsulcatina (Andrusov, 1910) † (original description)
Didacna voskobojnikovi Andrusov, 1910 † accepted as Pontalmyra voskobojnikovi (Andrusov, 1910) † (original description)

Dagestan for Didacna catillus var. surachanica Andrusov, 1910 † 
Dagestan for Didacna catillus var. vulgaris Andrusov, 1910 † 
Kazakhstan for Didacna catillus var. subcatillus Andrusov, 1910 † 
Krasnodar for Didacna voskobojnikovi Andrusov, 1910 † 
Krym for Didacna crassatellata var. trigona Andrusov, 1910 † 
Krym for Didacna incerta var. fragilis Andrusov, 1910 † 
Krym for Didacna karpinskyi Andrusov, 1910 † 
Krym for Didacna planicostata var. kiptschakensis Andrusov, 1910 † 
Krym for Didacna planicostata var. latecarinata Andrusov, 1910 † 
Krym for Didacna planicostata var. pluricostata Andrusov, 1910 † 
Krym for Didacna planicostata var. tenuicostata Andrusov, 1910 † 
Krym for Didacna subcrassatellata Andrusov, 1910 † 
Krym for Didacna subcrenulata Andrusov, 1910 † 
Krym for Didacna subdepressa Andrusov, 1910 † 
Krym for Didacna subincerta Andrusov, 1910 † 
Krym for Didacna subsulcatina Andrusov, 1910 † 
Romania for Didacna becenensis Andrusov, 1910 † 
Turkmenistan for Didacna carditoides Andrusov, 1910 † 

Neotype PIN 4899/385, identified as Didacna catillus var. surachanica Andrusov, 1910
Neotype PIN 4899/393, identified as Didacna catillus var. vulgaris Andrusov, 1910
Neotype PIN 4899/485, identified as Didacna catillus var. subcatillus Andrusov, 1910
Neotype PIN 694/195, identified as Didacna carditoides Andrusov, 1910

 Type locality

 for Didacna carditoides Andrusov, 1910 †

Cheleken [Peninsula], Turkemistan; Upper Bakunian [details]

 Type locality

 for Didacna catillus var. subcatillus Andrusov, 1910 †

Ashchisai, Mangyshlak Peninsula, Kazakhstan; Khvalynian [details]

 Type locality

 for Didacna catillus var. surachanica Andrusov, 1910 †

Dagestan; Upper Khazarian [details]

 Type locality

 for Didacna catillus var. vulgaris Andrusov, 1910 †

Village of Manas, Dagestan, Russia; Lower Khazarian [details]

 Type locality

 for Didacna incerta var. fragilis Andrusov, 1910 †

"Kamyschburun" [Komysh-Burun, Kerch peninsula, Crimea]; late Pontian, late Miocene [details]

 Type locality

 for Didacna planicostata var. kiptschakensis Andrusov, 1910 †

"Kiptschak" [Kipchak, Kerch peninsula], Ukraine; early Kimmerian, early Pliocene [details]

 Type locality

 for Didacna subcrassatellata Andrusov, 1910 †

"Kamyschburun [...], Nasyr" [Komysh-Burun and Nasyr, Kerch peninsula, Crimea]; late Pontian, late Miocene [details]

 Type locality

 for Didacna subcrenulata Andrusov, 1910 †

"Kamyschburun" [Komysh-Burun, Kerch peninsula, Crimea]; late Pontian, late Miocene [details]

 Type locality

 for Didacna subdepressa Andrusov, 1910 †

"Kamyschburun" [Komysh-Burun, Kerch peninsula, Crimea]; late Pontian, late Miocene [details]

 Type locality

 for Didacna subsulcatina Andrusov, 1910 †

"Kipschak und Nasyr" [Kipchak and Nasyr, Kerch peninsula], Ukraine; late Pontian, late Miocene [details]

 Type locality

 for Didacna voskobojnikovi Andrusov, 1910 †

"Chutor Tolstopjatova, Halbinsel Taman" [Tolstopyatova farm, Taman peninsula], Russia; late Kimmerian, Pliocene [details]