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Didacna agalarovae Bogachev & Gadzhiev, 1967 † (basis of record)
Didacna agolarovae [sic] † accepted as Didacna agalarovae Bogachev & Gadzhiev, 1967 † (basis of record)
Didacna akschaena G. I. Popov, 1983 † (basis of record)
Didacna alata Bogachev & Gadzhiev, 1967 † accepted as Didacna eulachia Fedorov, 1948 † (source of synonymy)
Didacna alibajramliensis Gadzhiev, 1966 † accepted as Didacna baeri (Grimm, 1877) (source of synonymy)
Didacna alibajramlinica Vekilov, 1969 † accepted as Didacna carditoides Andrusov, 1910 † (source of synonymy)
Didacna aligulica Nevesskaja, 2007 † (original description)
Didacna anomala Nevesskaja, 2007 † (original description)
Didacna apscheronica Geivandova, 1956 † accepted as Didacna delenda Bogachev, 1932 † (source of synonymy)
Didacna artemiana Bogachev, 1932 † (basis of record)
Didacna baeri var. transmittens Pravoslavlev, 1939 † accepted as Didacna subpyramidata Pravoslavlev, 1939 † (additional source)
Didacna baericrassa (Pavlov, 1925) † (basis of record)
Didacna bergi Fedorov, 1948 † (basis of record)
Didacna bogatschevi Pravoslavlev, 1939 † accepted as Didacna subcrassa subcrassa Pravoslavlev, 1939 † (source of synonymy)
Didacna bogatschevi var. opima Pravoslavlev, 1939 † (additional source)
Didacna borisphenica Nevesskaja, 1963 † (basis of record)
Didacna carditoides Andrusov, 1910 † (basis of record)
Didacna carinata Nevesskaja, 2007 (original description)
Didacna catilloides Pravoslavlev, 1939 † accepted as Didacna grimmi Pravoslavlev, 1939 † (source of synonymy)
Didacna catillus (Eichwald, 1841) † (basis of record)
Didacna catillus devexa G. I. Popov, 1983 † accepted as Didacna miussica G. I. Popov, 1983 † (source of synonymy)
Didacna catillus grimmi Pravoslavlev, 1939 † accepted as Didacna grimmi Pravoslavlev, 1939 † (source of synonymy)
Didacna catillus transcaspica Nevesskaja, 1958 † (basis of record)
Didacna celekenica Fedorov, 1948 † (basis of record)
Didacna charamica Fedorov, 1953 † (basis of record)
Didacna colossea Asadullaev, 1965 † accepted as Didacna pravoslavlevi pravoslavlevi Fedorov, 1948 † (source of synonymy)
Didacna colossea var. miranda Asadullaev, 1965 † accepted as Didacna pravoslavlevi pravoslavlevi Fedorov, 1948 † (source of synonymy)
Didacna convexa Geivandova, 1956 † accepted as Didacna umbonata Ebersin, 1958 † (source of synonymy)
Didacna corpulenta Zhukov, 1933 † (basis of record)
Didacna cristata Bogachev, 1932 † (source of synonymy)
Didacna curta G. I. Popov, 1983 † (basis of record)
Didacna delenda Bogachev, 1932 † (basis of record)
Didacna dilatata Pravoslavlev, 1939 † (basis of record)
Didacna ebersini Fedorov, 1953 † (basis of record)
Didacna elongatoovata Pravoslavlev, 1939 † accepted as Didacna obliquetrigona Pravoslavlev, 1939 † (source of synonymy)
Didacna elongatoovata var. bogatschevi Pravoslavlev, 1939 † accepted as Didacna grimmi Pravoslavlev, 1939 † (additional source)
Didacna emendata G. I. Popov, 1983 † (basis of record)
Didacna eulachia Fedorov, 1948 † (basis of record)
Didacna eulachia var. charamina Gadzhiev, 1966 † accepted as Didacna eulachia Fedorov, 1948 † (source of synonymy)
Didacna fedorovi Nevesskaja, 2007 † (original description)
Didacna frequens Pravoslavlev, 1939 † accepted as Didacna subrudis Pravoslavlev, 1939 † accepted as Didacna grimmi Pravoslavlev, 1939 † (source of synonymy)
Didacna gibba Pravoslavlev, 1939 † accepted as Didacna subrudis Pravoslavlev, 1939 † accepted as Didacna grimmi Pravoslavlev, 1939 † (source of synonymy)
Didacna gilgilica Nevesskaja, 2007 † (original description)
Didacna gmelini Pravoslavlev, 1939 † accepted as Didacna subcrassa subcrassa Pravoslavlev, 1939 † (source of synonymy)
Didacna grimmi Pravoslavlev, 1939 † (additional source)
Didacna gurganica Vekilov, 1969 † (basis of record)
Didacna guriensis Nevesskaja, 1963 † (basis of record)
Didacna hebes Pravoslavlev, 1939 † accepted as Didacna subcrassa subcrassa Pravoslavlev, 1939 † (source of synonymy)
Didacna hebes var. romboidea Pravoslavlev, 1939 † (additional source)
Didacna hians Pravoslavlev, 1939 † accepted as Didacna obliquetrigona Pravoslavlev, 1939 † (source of synonymy)
Didacna hospes Vekilov, 1969 † (basis of record)
Didacna hyrcana G. I. Popov, 1983 † (basis of record)
Didacna incrassa Pravoslavlev, 1939 † accepted as Didacna subcrassa subcrassa Pravoslavlev, 1939 † (source of synonymy)
Didacna incrassata Bogachev, 1932 † accepted as Didacna nalivkini Vassoevich, 1930 † (source of synonymy)
Didacna itilica G. I. Popov, 1983 † (basis of record)
Didacna janischevckii Geivandova, 1956 † accepted as Didacna artemiana Bogachev, 1932 † (source of synonymy)
Didacna karpevitschae Bogachev & Gadzhiev, 1967 † accepted as Didacna porsugelica Nevesskaja, 1958 † (source of synonymy)
Didacna knipovitshi Bogachev & Gadzhiev, 1967 † accepted as Didacna eulachia Fedorov, 1948 † (source of synonymy)
Didacna kolesnikovi Fedorov, 1953 † (basis of record)
Didacna kovalevskii Bogachev, 1932 † (basis of record)
Didacna kurovdagica Vekilov, 1969 † accepted as Didacna charamica Fedorov, 1953 † (source of synonymy)
Didacna latens Bogachev, 1932 † (source of synonymy)
Didacna lindeyi [sic] † accepted as Didacna lindleyi Fedorov, 1948 † (basis of record)
Didacna lindleyi Fedorov, 1948 † (basis of record)
Didacna lindleyi derupta G. I. Popov, 1983 † (source of synonymy)
Didacna lintriculus Pravoslavlev, 1939 † accepted as Didacna subrudis Pravoslavlev, 1939 † accepted as Didacna grimmi Pravoslavlev, 1939 † (source of synonymy)
Didacna lissitzyni G. I. Popov, 1983 † (basis of record)
Didacna mingetschaurica Vekilov, 1969 † (basis of record)
Didacna mischovdagica Vekilov, 1969 † (basis of record)
Didacna miussica G. I. Popov, 1983 † (basis of record)
Didacna monodacnoides G. I. Popov, 1983 † (basis of record)
Didacna nalivkini Vassoevich, 1930 † (basis of record)
Didacna naviculata Pravoslavlev, 1939 † accepted as Didacna grimmi Pravoslavlev, 1939 † (source of synonymy)
Didacna obliquetrigona Pravoslavlev, 1939 † (basis of record)
Didacna obunca G. I. Popov, 1983 † (basis of record)
Didacna olla Nevesskaja, 1963 † (basis of record)
Didacna ostroumovi Pravoslavlev, 1939 † accepted as Didacna subrudis Pravoslavlev, 1939 † accepted as Didacna grimmi Pravoslavlev, 1939 † (source of synonymy)
Didacna ovatocrassa Pravoslavlev, 1939 † (basis of record)
Didacna ovatocrassa apscheronica Nevesskaja, 2007 † (original description)
Didacna ovatula Pravoslavlev, 1939 † accepted as Didacna obliquetrigona Pravoslavlev, 1939 † (source of synonymy)
Didacna pallasi Pravoslavlev, 1939 † accepted as Didacna subpyramidata Pravoslavlev, 1939 † (source of synonymy)
Didacna paracrassa Pravoslavlev, 1939 † accepted as Didacna subcrassa subcrassa Pravoslavlev, 1939 † (source of synonymy)
Didacna parallella Bogachev, 1932 (basis of record)
Didacna parallella var. borealis Fedorov, 1953 † accepted as Didacna parallella Bogachev, 1932 (source of synonymy)
Didacna parvula Nalivkin, 1915 † (basis of record)
Didacna plana Nevesskaja, 1958 † (basis of record)
Didacna pontocaspia (Pavlov, 1925) † (basis of record)
Didacna porsugelica Nevesskaja, 1958 † (basis of record)
Didacna postcarditoides Nalivkin & Anisimov, 1914 † accepted as Didacna nalivkini Vassoevich, 1930 † (source of synonymy)
Didacna praepallasi Fedorov, 1999 † accepted as Didacna pseudocrassa pseudocrassa (Pavlov, 1925) † (source of synonymy)
Didacna praeprotracta Pravoslavlev, 1939 † accepted as Didacna obliquetrigona Pravoslavlev, 1939 † (source of synonymy)
Didacna praeprotracta var. dubia Pravoslavlev, 1939 † (additional source)
Didacna praetrigonoides Nalivkin & Anisimov, 1914 † (basis of record)
Didacna praetrigonoides abescunica G. I. Popov, 1983 † accepted as Didacna praetrigonoides praetrigonoides Nalivkin & Anisimov, 1914 † (source of synonymy)
Didacna praetrigonoides inderana Svitoch, 1967 † accepted as Didacna praetrigonoides praetrigonoides Nalivkin & Anisimov, 1914 † (source of synonymy)
Didacna praetrigonoides paleotrigonoides Fedorov, 1953 † (basis of record)
Didacna praetrigonoides praetrigonoides Nalivkin & Anisimov, 1914 † (basis of record)
Didacna pravoslavlevi Fedorov, 1948 † (basis of record)
Didacna pravoslavlevi karelini Fedorov, 1953 † (basis of record)
Azerbaijan for Didacna fedorovi Nevesskaja, 2007 †
Azerbaijan for Didacna gilgilica Nevesskaja, 2007 †
Azerbaijan for Didacna incrassata Bogachev, 1932 †
Azerbaijan for Didacna ovatocrassa apscheronica Nevesskaja, 2007 †
Kazakhstan for Didacna protracta mangyschlakensis Nevesskaja, 2007 †
Kazakhstan for Didacna protracta raricostata Nevesskaja, 2007 †
Kazakhstan for Didacna subcrassa mangyschlakensis Nevesskaja, 2007 †
Kazakhstan for Didacna subquadrata Nevesskaja, 2007 †
Krym for Didacna symmetrica kerchensis Nevesskaja, 2007 †
North Caucasus for Didacna ebersini Fedorov, 1953 †
Turkmenistan for Didacna aligulica Nevesskaja, 2007 †
Turkmenistan for Didacna anomala Nevesskaja, 2007 †
Turkmenistan for Didacna carinata Nevesskaja, 2007
Turkmenistan for Didacna subtrigonula Nevesskaja, 2007 †
Turkmenistan for Didacna turkmenica Nevesskaja, 2007 †
Holotype PIN 4899/1623, identified as Didacna protracta mangyschlakensis Nevesskaja, 2007
Holotype PIN 4899/387, identified as Didacna fedorovi Nevesskaja, 2007
Holotype PIN 4899/450, identified as Didacna subquadrata Nevesskaja, 2007
Holotype PIN 4899/455, identified as Didacna gilgilica Nevesskaja, 2007
Holotype PIN 694/1474, identified as Didacna ovatocrassa apscheronica Nevesskaja, 2007
Holotype PIN 694/1505, identified as Didacna anomala Nevesskaja, 2007
Holotype PIN 694/1516b, identified as Didacna turkmenica Nevesskaja, 2007
Holotype PIN 694/1519, identified as Didacna subtrigonula Nevesskaja, 2007
Holotype PIN 694/1526, identified as Didacna aligulica Nevesskaja, 2007
Holotype PIN 694/1618, identified as Didacna protracta raricostata Nevesskaja, 2007
Holotype PIN 694/1622, identified as Didacna subcrassa mangyschlakensis Nevesskaja, 2007
Holotype PIN 694/840, identified as Didacna carinata Nevesskaja, 2007
The record of that species in the synonymy list of Didacna nalivkini Vassoevich, 1930 by Nevesskaja (2007, p. 900) ... [details]
Not mentioned in the revision of the genus by Nevesskaja (2007) [details]
Not mentioned in the revision of the genus by Nevesskaja (2007) [details]
Prikaspiiskaya Lowland, Lower Khvalynian Subhorizon. Recent Caspian Sea, mostly its middle and southern regions [details]
Invalid: junior homonym of Didacna convexa Geivandova, 1956 [details]
PIN 694/1550; Elton Lake surroundings in the northern Caspian plains, Russia (early Khvalynian, Late Pleistocene) [details]
Not mentioned by later revisions of the genus (e.g. Yanina 2005, Nevesskaja 2007). Nevesskaja (2007) listed ... [details]
Not mentioned by later revisions of the genus (e.g. Svitoch 1967, Yanina 2005, Nevesskaja 2007). However, ... [details]
Nevesskaja (2007) listed the parent species as tentative synonym of Didacna obliquetrigona Pravoslavlev, 1939. She ... [details]
Nevesskaja (2007) listed the parent species as tentative synonym of Didacna subcrassa subcrassa Pravoslavlev, 1939. ... [details]
Nevesskaja (2007) listed the parent species as tentative synonym of Didacna obliquetrigona Pravoslavlev, 1939. She ... [details]
Nevesskaja (2007) included in the synonymy list for the parent species also the illustrations referring to the ... [details]
Not mentioned by later revisions of the genus (e.g. Yanina 2005, Nevesskaja 2007). However, Nevesskaja (2007) ... [details]
Nevesskaja (2007) listed the species as tentative synonym of Didacna vulgaris Andrusov, 1910. She included the ... [details]
Nevesskaja (2007) listed the parent species as tentative synonym of Didacna vulgaris Andrusov, 1910. She included ... [details]
Nevesskaja (2007) listed the species as tentative synonym of Didacna vulgaris Andrusov, 1910. She included the ... [details]
Nevesskaja (2007) listed the species as tentative synonym of Didacna vulgaris Andrusov, 1910. She included the ... [details]
Considered a synonym of Didacna praetrigonoides praetrigonoides Nalivkin & Anisimov, 1914 [details]
Listed as tentative synonym of Didacna umbonata Ebersin, in Nevesskaja, 1958 by Nevesskaja (2007). If that synonymy ... [details]
Nevesskaja (2007) indicated the subspecies to be partly and tentatively a synonym of Didacna lindleyi Fedorov, 1948 ... [details]
Svitoch (1967) considered Didacna pallasi Pravoslavlev, 1939 and D. pallasi var. angulata as synonyms of Didacna ... [details]
A part of the material of the variety was later described as Didacna corpulenta Zhukov, 1933. The rest is ... [details]
Not mentioned by later revisions of the genus (e.g. Yanina 2005, Nevesskaja 2007). However, Nevesskaja (2007) ... [details]
Considered a synonym of Didacna ebersini Fedorov, 1953 by Yanina (2005). Nevesskaja (2007) listed it as a tentative ... [details]
Village of Khudaidag, Turkmenistan; Lower Khazarian [details]
Cheleken Peninsula, western Turkmenistan; Urundzhikian [details]
Caspian Sea, northern Karabugaz Spit, Turkmenistan; Neocaspian Horizon [= Holocene] [details]
Type series lost, neotype locality: Mishovdag Mountain Range, Prikurinskaya Lowland, Azerbaijan [details]
Type series lost, neotype locality: northern Caspian Region (no precise locality) [details]
Mishovdag, Azerbaijan; Lower Bakunian [details]
Gil’gil’chai River, northern Azerbaijan; Lower Khazarian [details]
Village of Razin, Apsheron Peninsula, Azerbaijan; Lower Khazarian [details]
Type series lost, neotype locality: Mishovdag Mountain Range, Prikurinskaya Lowland, Azerbaijan [details]
northern Caspian Region; Lower Khvalynian Subhorizon [the neotype locality] [details]
Ashche-sai gully, Mangyshlak Peninsula, Kazakhstan; Lower Khvalynian [details]
Beach north of the Sagandyk Cape, eastern coast of the Caspian Sea, Kazakhstan; Neocaspian [details]
Mangyshlak Peninsula, between the Ada Spit and the Porsu Cape, Kazakhstan; Upper Khazarian [details]
Buzachi Peninsula, northwestern Caspian Region, Kazakhstan; Urundzhikian or Khazarian [details]
Cheleken Peninsula, western Turkmenistan; Lower Khazarian [details]
Kerch Peninsula; Eoeuxinian [details]
Village of Khudaidag, Turkmenistan; Lower Khazarian [details]
The type series is lost (Nevesskaja, 2007) [details]
